AP212 Gear Pumps. Standard and Low Noise series. Reference: 200-P EN-03 1/60. Issue:

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1 Gear Pumps Standard and Low Noise series Reference: 2-P EN-3 Issue: /6

2 Contents Page 1 General information External gear pumps components Example of typical sound pressure level recorded in a semi-anechoic testing room Technical data Pressure Suction General precaution Identifying the rotation direction Motor-pump coupling Non-standard symbols used in the text Calculating the specification of a gear pump Diagrams Overview standard types Standard configuration Single pump customised versions Single pump customised versions order example Single pump dimensions Shaft end code Front cover Body Back covers Multiple gear pumps Drive torque Tandem pumps dimensions (standard version without shaft seal between the pumps) Tandem pumps dimensions (special version with shaft seal between the pumps) Triple pumps dimensions (standard version without shaft seal between the pumps) Triple pumps dimensions (special version with shaft seal between the pumps) How to order tandem pumps (with or without shaft seal between the pumps) How to order triple pumps (with or without shaft seal between the pumps) Tandem pumps dimensions + AP1 (with shaft seal between the pumps) How to order tandem pumps + AP1 (with shaft seal between the pumps) Circuits/valves option Load sensing circuits /6

3 6 Rotation changing instructions Pumps seal kit NBR standard type Product identification plate Application form /6

4 1 General information The product range of Bucher Hydraulics SpA includes single pumps HP-25-3 (corresponding with the common group denominations: ) and several combinations of double pumps, triple pumps, and so on, that can be assembled together according to versions of displacement, flanging, and auxiliary valves. External gear pumps are widely used in modern hydraulic systems due to their high performance, long service life and low purchase and maintenance costs. Here following we introduce you the new family range. Product development of the new family has made it possible to achieve high operating pressures, excellent volumetric and mechanical efficiency and on specially developed units (LN Low Noise) even lower noise levels. This has been possible by means of: - new design of gear teeth and balancing areas - use of high-performance materials - carefully controlled heat treatments - increasingly tight coupling tolerances and a high standard of surface finish - continuous development in our semi-anechoic room Bucher Hydraulics has so achieved these results by constantly improving its design, control and manufacturing techniques inline with the latest technological developments, while simultaneously enhancing our Quality Control System which ensures that every single product offers the same high standards. 4/6

5 1.1 External gear pumps components Retaining ring 2. Shaft seal 3. Front cover 4. Balancing seal 5. Back up seal 6. Balancing block 7. Drive gear 8. Driven gear 9. Oil seal 1. Centering pin 11. Pump body 12. Back cover 13. Fixing screw and washer Improvements (New vs AP2) Front covers : In addition to aluminium versions, complete new range of cast iron front covers Balancing blocks : New generation optimised and standardised balancing blocks Gears : New gears profile (12 teeth) with increased transmissible torque Bodies: New design pump bodies Back covers: Wide range of aluminium and cast iron back covers with/ without integrated cartridge valves GEAR PUMPS TARGET HYDRAULIC CIRCUIT Fluid-borne noise Structural-borne noise Flow pulsation reduction Vibration reduction Airborne noise Pump low noise level 5/6

6 AP2 LN Ø 12 = number of new optimised teeth Ø18 Ø2 Ø2 H = H = 21 H = 21 Measurements in mm optimised balancing H area with higher performance materials AP2 Standard gear pump Gear pump Low Noise gear pump Time Pulsation Pulsation reduced Time/2 Pulsation/4-75% 1.2 Example of typical sound pressure level recorded in a semi-anechoic testing room 7 Noise reduction effects LAeq [db(a)] AP2/15 /15 /15LN Pressure [bar] Oil temperature: 4 C - Oil viscosity: 32 mm2/s Distance between pump and sensor: 1 m 6/6

7 1.3 Technical data Operating fluid temperature range (mineral oil): Recommended fluids Viscosity range: Features NBR HNBR Recommended Permitted Permitted for starting -15 / +8 C (peak: -2 / +9 C) -2 / +9 C (peak: -3 / +11 C) hydraulic mineral oil-based 2-12 mm 2 /s (cst) 12-7 mm 2 /s (cst) 2 mm 2 /s (cst) Cleanliness: recommended up to 14 bar (2 PSI) recommended up to 21 bar (3 PSI) recommended up to 275 bar (4 PSI) 2/18/15 ISO /17/14 ISO /15/12 ISO 446 Minimum storage temperature: Standard seals material (valves not included) NBR HNBR -25 C -35 C NBR + HNBR standard ( ISO1629) Type AP/APR212 Displacement cm 3 /rev Cu.In. P.R. AP/APR212LN Displacement cm 3 /rev Cu.In. P.R. P1 (continuous) Max. pressure* P2 (intermittent) P3 (peak) n min. P2 < 1 bar n min. 1<n< 18 bar n min. 18<n< P2 n max. bar P.S.I. bar P.S.I. bar P.S.I. rpm rpm rpm rpm ** ** * Referred to pumps and motors with flanged ports. Utilising threaded ports, please to consider a significantly de-rated performances. The mechanical stress localised on threaded ports cause a reduced pump life performances ** obtained with a specific balancing plate, please contact our Sales Center IMPORTANT!: Please consult Bucher Hydraulics if even one of the operating limits indicated in the table (temperature, pressure, rpm) is exceeded, as well as in the case of two or more maximum values at the same time, or for applications with particularly heavy-duty cycles 1.4 Pressure Pressure levels: P1 = continuous pressure P2 = intermittent pressure P3 = peak pressure The recommended oil speed in the pressure pipes is: v = 2 to 5 m/s p (bar) P3 P2 P1.5 s max. 15 s t (s) 7/6

8 1.5 Suction The absolute suction pressure must be P in.75 bar (11 PSI); therefore, the following conditions must be avoided: - large height differences between pump and tank - long stretches of piping - special features such as: - bends - reductions in diameter - quick couplings - etc. It is also advisable to choose a filter of a suitable size to minimise any pressure drop and to take measures to prevent gradual clogging over time. (Example 1) In certain cases, the suction pressure can exceed 1 bar (14.3 PSI), or atmospheric pressure. Please contact our Sales Department, solution for P in 3.5 bar (5 PSI), are available. If in a particular application the P in pressure is higher than the recommended value, contact our Sales Office. The diameter of the suction pipe should ensure that the oil speed will fall within the range: v = m/s. P out P in (Example 1) M (Example 2) P in P out M (Example 2) 1.6 General precaution In addition to the recommendations regarding fluids, filtration, coupling, etc., we suggest the following: - Always check the rotation direction of the pump's drive shaft; it must be compatible with the rotation direction of the pump itself. - Be particularly careful in cleaning and make sure, when connecting the suction and pressure piping, that no chips, rag threads, teflon tape, etc. get into the pump circulation system. - Check the tightness of the suction and pressure fittings, the correct positioning of the O-Ring, and make sure there is no dirt between the flange and the pump body. - The first pump start-up can be facilitated by manually filling the suction piping and the pump itself with oil. To facilitate air bleeding, start the pump with the circuit not pressurised. - To ensure the best heat distribution inside the tank, make sure the return pipe is not too close to the pump's suction piping. The pipings themselves should be below oil tank level to prevent the formation of foam. - Do not subject the pumps to operating conditions different from those indicated on section 1.3 ; for extreme operations, always contact our Technical Department. - Never use fluids different from those indicated in section 1.3 and do not use fluids incompatible with the pump seals (i.e. HNBR) - In the event of pump painting, do not use solvents or paints that are incompatible with the material of the seals. Do not bake paint with excessively high temperatures. Do not paint over the product identification plate Directives and standards Atex Attention: The equipment and protective systems of these catalogue ARE NOT intended for use in potentially explosive atmospheres that is to say where there is an explosive atmosphere referred to in Article 2 of the Directive 99/92/EC and referred to Article 1.3 of the Directive 94/9/EC Machinery safety Hydraulic pumps are excluded by Directive 26/42/EC - ISO 91:28 / ISO 141:24 Bucher Hydraulics S.p.A. is certified for research, development and production of directional control valves, gear pumps and motors, power units, electro pumps, cartridge valves and integrated manifolds for hydraulic applications. 8/6

9 1.7 Identifying the rotation direction The rotation direction of a gear pump is identified by looking at the pump from the front and with the drive gear turned upwards (see figures below). Pumps with clockwise rotation (D) have a drive gear which turns clockwise, with the suction port on the left and the pressure port on the right. Pumps with counterclockwise rotation (S) have a drive gear which turns counterclockwise, with the suction port on the right and the pressure port on the left. The figure also shows the pressure flow inside the pumps as the oil is transferred from the suction port to the pressure port. As regards reversible pumps (R), the ports are alternatively for suction and pressure. Pumps with a unidirectional rotation (D or S) have the denomination AP. Pumps with reversible rotation have the denomination APR. Pumps with Low Noise components have the denomination LN. D S R Suction Pressure Pressure Suction Suction Pressure Pressure Suction Right-hand rotation Left-hand rotation Reversible rotation 1.8 Motor-pump coupling Absolutely no radial or axial forces should be transmitted to the drive shaft in the motor-pump coupling. Such forces cause rapid and irregular wear on the balancing surface of the bushings and gear support, with a consequent worsening in pump performance. The coupling joint must be able to absorb any discrepancies in the coaxial alignment of the motor-pump shafts without placing any load on the pump shaft. In the couplings between splined shafts, the connecting sleeve must be free to move along its axis. The length of the sleeve must be sufficient to cover the splined sections of the motor-pump shafts completely in any position. A clearance between shaft ends it is necessary. Make sure that the splined coupling is suitably lubricated to protect it against rapid deterioration. If there are radial and/or axial loads on the drive shaft, such as when it is driven by a V-belt and pulley or pair of gear wheels, it should be fitted with a front cover with supporting bearings. (See examples in section ) Depending on the pump model concerned, these supports can replace the front cover of the pump or can be fitted in addition to and over the front cover. 9/6

10 1.9 Non-standard symbols used in the text Check nut Hexagonal-head screw ( TE screw) O-Ring Lock washer Socket head screw (TCE screw) Woodruff key 4 11 Dynamometric spanners Gear pump standard configuration: materials indication Square key 1.1 Calculating the specification of a gear pump The following parameters are defined: Vc = (cm 3 /rev) pump displacement; n = (rev/min) no. of rpms of the drive shaft; Q = (l/min) flow rate; p = (bar) operating pressure; T = (Nm) drive torque; N = (kw) Absorbed power; p Vc Q T n M N (T, n) v = (%) volumetric efficiency; m = (%) mechanical efficiency; t = (%) total efficiency Q = Vc n 1 η v T = 1.59 N = p Vc η m Q p 6 η t Example /11 Vc= 11.1 cm 3 /r n= 15 r/min p=2 bar η v = 94% η m = 9% η t = 84.6% Q = = l/min. T = = 39.2 Nm N = = 6.56 kw 1/6

11 1.11 Diagrams Oil viscosity: 37 mm 2 /s Oil temperature: 4 C /26 p=2bar /26 p=2bar /22 p=2bar /22 p=2bar /19 p=2bar /19 p=2bar /15 p=2bar /15 p=2bar Q [l/min] 4 3 /11 p=2bar /11 p=2bar /8,5 p=2bar /8,5 p=2bar n [r/min] 14 /8, /11 Δp=27 bar Δp=25 bar Δp=2 bar Δp=25 bar 36 Δp=2 bar Δp=27 bar Δp=25 bar Δp=2 bar 56 P [KW] 8 6 Δp=15 bar Δp=1 bar Δp=15 bar 24 Δp=1 bar M [Nm] P [KW] Δp=25 bar Δp=2 bar Δp=15 bar 48 Δp=15 bar 4 32 Δp=1 bar M [Nm] 4 Δp=5 bar Δp=5 bar Δp=1 bar Δp=5 bar Δp=5 bar n [r/min] n [r/min] 11/6

12 / Δp=27 bar Δp=25 bar Δp=27 bar 72 Δp=25 bar Δp=2 bar /19 Δp=22 bar 8 Δp=22 bar Δp=2 bar 72 Δp=2 bar 64 Δp=15 bar 56 Δp=15 bar 14 Δp=2 bar P [KW] 12 Δp=15 bar 1 8 Δp=1 bar 6 4 Δp=5 bar 2 Δp=15 bar Δp=1 bar Δp=5 bar M [Nm] P [KW] 1 Δp=1 bar 8 6 Δp=5 bar 4 2 Δp=1 bar Δp=5 bar M [Nm] n [r/min] n [r/min] 24 /22 Δp=22 bar /26 Δp=2 bar Δp=2 bar Δp=22 bar 88 Δp=2 bar Δp=2 bar Δp=15 bar 8 P [KW] Δp=15 bar Δp=1 bar Δp=15 bar Δp=1 bar M [Nm] P [KW] Δp=15 bar Δp=1 bar Δp=1 bar M [Nm] 8 6 Δp=5 bar Δp=5 bar Δp=5 bar Δp=5 bar n [r/min] n [r/min] 12/6

13 2 Overview standard types This pumps configuration are considered as standard S B 2S-SAEB Example European 4 bolt 2 European rectangular (Ø 36.5 mm ) Tapered 1 shaft 1:8 1: In the next pages, front, rear cover, and seals materials are listed for each pump series. For ordering purposes, it is enough to outline the complete pump description (for example: /4.5 D 218). In case of a different configuration request (or a combination of different features, such as port threads, front flange materials, etc.), the description configurator shown in section 3.1 can be easily used. 2.1 Standard configuration Port type Aluminium front cover type Drive shaft European 4 bolts flanged 2 European rectangular (Ø 36.5 mm ) 1 Tapered shaft 1:8 1:8 8 German 4 bolts flanged 2 German rectangular (Ø 8 mm inches) 2 Tapered shaft 1:5 1:5 5 BSPP Threaded ports 8 Through 2 bolts (Ø 5 mm ) 3 Tang drive 8 mm -.32 inches 8 9 SAE Threaded ports 8 Through 2 bolts (Ø 5 mm ) 4 9 Teeth external spline B17X14 DIN NPTF Threaded ports 8 Through 2 bolts (Ø 52 mm ) 5 9 teeth external spline SAE J 498-9T 16/32 DP 7S SAE-A 2 bolts (Ø mm inches) 8 Straight keyed Ø 15,85 mm -.62 inches Cast iron front cover type SAE-B 2 bolts (Ø 11,6 mm - 4 inches) 8 13/6

14 Serie page Serie page Serie page S B 29 2S-SAEB 3 For reversible pumps alternative inlet and outlet ports have the same sizes as per inlet unidirectional rotation. 14/6

15 AP APR ED A Serie Gear pump material Front cover: aluminium Body: aluminium Back cover: cast iron Seals: NBR + HNBR ø F Depth Shaft max torque: see section 3.3 Tightening torque: see section d D B h ø M12x1,5 ø DIA Taper 1:8 ø36.5 f DIA Nm Reversible pump ED - External Drain /4 BSP Depth Type Displacement cm 3 /rev Dimensions Suction Pressure A B d D F d D F LN mm inch mm inch mm inch mm inch mm mm inch mm inch mm M6X M8X M6X M8X1.25 Clockwise rotation: D Counter-clockwise rotation: S Reversible pump External Drain Standard Low Noise Standard Low Noise Standard Low Noise /4.5 D 218 /4.5LN D 218 /4.5 S 218 /4.5LN S 218 APR212/4.5 ED 218 APR212/4.5LN ED 218 /6.5 D 218 /6.5LN D 218 /6.5 S 218 /6.5LN S 218 APR212/6.5 ED 218 APR212/6.5LN ED 218 /8.5 D 218 /8.5LN D 218 /8.5 S 218 /8.5LN S 218 APR212/8.5 ED 218 APR212/8.5LN ED 218 /11 D 218 /11LN D 218 /11 S 218 /11LN S 218 APR212/11 ED 218 APR212/11LN ED 218 /15 D 218 /15LN D 218 /15 S 218 /15LN S 218 APR212/15 ED 218 APR212/15LN ED 218 /19 D 218 /19LN D 218 /19 S 218 /19LN S 218 APR212/19 ED 218 APR212/19LN ED 218 /22 D 218 /22LN D 218 /22 S 218 /22LN S 218 APR212/22 ED 218 APR212/22LN ED 218 /26 D 218 /26LN D 218 /26 S 218 /26LN S 218 APR212/26 ED 218 APR212/26LN ED /6

16 AP APR ED Serie 818 A B ø M12x1.5 ø 36.5 f Gear pump material ø G Inlet - Outlet ø DIA Taper 1:8 19 Nm Front cover: aluminium Body: aluminium Back cover: cast iron Seals: NBR + HNBR Shaft max torque: see section 3.3 Tightening torque: see section h Reversible pump ED - External Drain /4 BSP Depth 13 Type Displacement cm 3 /rev Dimensions Suction Pressure A B G G LN mm inch mm inch BSPP BSPP /8 1/2 3/8 3/4 1/2 Clockwise rotation: D Counter-clockwise rotation: S Reversible pump External Drain Standard Low Noise Standard Low Noise Standard Low Noise /4.5 D 818 /4.5LN D 818 /4.5 S 818 /4.5LN S 818 APR212/4.5 ED 818 APR212/4.5LN ED 818 /6.5 D 818 /6.5LN D 818 /6.5 S 818 /6.5LN S 818 APR212/6.5 ED 818 APR212/6.5LN ED 818 /8.5 D 818 /8.5LN D 818 /8.5 S 818 /8.5LN S 818 APR212/8.5 ED 818 APR212/8.5LN ED 818 /11 D 818 /11LN D 818 /11 S 818 /11LN S 818 APR212/11 ED 818 APR212/11LN ED 818 /15 D 818 /15LN D 818 /15 S 818 /15LN S 818 APR212/15 ED 818 APR212/15LN ED 818 /19 D 818 /19LN D 818 /19 S 818 /19LN S 818 APR212/19 ED 818 APR212/19LN ED 818 /22 D 818 /22LN D 818 /22 S 818 /22LN S 818 APR212/22 ED 818 APR212/22LN ED 818 /26 D 818 /26LN D 818 /26 S 818 /26LN S 818 APR212/26 ED 818 APR212/26LN ED /6

17 AP APR ED Serie F Depth A B ø16 DIN DIA.6 M12X1.5 ø 8 e DIA ø9 Gear pump material.354 d D ø DIA Taper 1: Nm 6 - Front cover: aluminium Body: aluminium Back cover: cast iron Seals: NBR + HNBR Shaft max torque: see section 3.3 Tightening torque: see section h Reversible pump ED - External Drain M12X1.5 Depth 13 Type Displacement Dimensions Suction Pressure cm 3 /rev A B d D F d D F LN mm inch mm inch mm inch mm inch mm mm inch mm inch mm M6X M6X1 Clockwise rotation: D Counter-clockwise rotation: S Reversible pump External Drain Standard Low Noise Standard Low Noise Standard Low Noise /4.5 D 225 /4.5LN D 225 /4.5 S 225 /4.5LN S 225 APR212/4.5 ED 225 APR212/4.5LN ED 225 /6.5 D 225 /6.5LN D 225 /6.5 S 225 /6.5LN S 225 APR212/6.5 ED 225 APR212/6.5LN ED 225 /8.5 D 225 /8.5LN D 225 /8.5 S 225 /8.5LN S 225 APR212/8.5 ED 225 APR212/8.5LN ED 225 /11 D 225 /11LN D 225 /11 S 225 /11LN S 225 APR212/11 ED 225 APR212/11LN ED 225 /15 D 225 /15LN D 225 /15 S 225 /15LN S 225 APR212/15 ED 225 APR212/15LN ED 225 /19 D 225 /19LN D 225 /19 S 225 /19LN S 225 APR212/19 ED 225 APR212/19LN ED 225 /22 D 225 /22LN D 225 /22 S 225 /22LN S 225 APR212/22 ED 225 APR212/22LN ED 225 /26 D 225 /26LN D 225 /26 S 225 /26LN S 225 APR212/26 ED 225 APR212/26LN ED /6

18 AP APR ED Serie F Depth A B ø 16.5 h DIA ø 8 e ø DIA Gear pump material d D B 17X14 DIN 5482 Front cover: aluminium Body: aluminium Back cover: cast iron Seals: NBR + HNBR Shaft max torque: see section 3.3 Tightening torque: see section Reversible pump ED - External Drain M12X1.5 Depth 13 Type Displacement cm 3 /rev Dimensions Suction Pressure A B d D F d D F LN mm inch mm inch mm inch mm inch mm mm inch mm inch mm M6X M6X1 Clockwise rotation: D Counter-clockwise rotation: S Reversible pump External Drain Standard Low Noise Standard Low Noise Standard Low Noise /4.5 D 227 /4.5LN D 227 /4.5 S 227 /4.5LN S 227 APR212/4.5 ED 227 APR212/4.5LN ED 227 /6.5 D 227 /6.5LN D 227 /6.5 S 227 /6.5LN S 227 APR212/6.5 ED 227 APR212/6.5LN ED 227 /8.5 D 227 /8.5LN D 227 /8.5 S 227 /8.5LN S 227 APR212/8.5 ED 227 APR212/8.5LN ED 227 /11 D 227 /11LN D 227 /11 S 227 /11LN S 227 APR212/11 ED 227 APR212/11LN ED 227 /15 D 227 /15LN D 227 /15 S 227 /15LN S 227 APR212/15 ED 227 APR212/15LN ED 227 /19 D 227 /19LN D 227 /19 S 227 /19LN S 227 APR212/19 ED 227 APR212/19LN ED 227 /22 D 227 /22LN D 227 /22 S 227 /22LN S 227 APR212/22 ED 227 APR212/22LN ED 227 /26 D 227 /26LN D 227 /26 S 227 /26LN S 227 APR212/26 ED 227 APR212/26LN ED /6

19 AP APR ED A Serie F Depth B ø16 DIN DIA M12X1.5 ø 5 f DIA X Gear pump material ø DIA 8.32" d D X ø17.67 DIA Taper 1: Nm h Reversible pump ED - External Drain Front cover: aluminium Body: aluminium Back cover: cast iron Seals: NBR + HNBR Shaft max torque: see section Nm M1x1.5 DIN931 Tightening torque: see section M12X1.5 Depth 13 Type Displacement cm 3 /rev Dimensions Suction Pressure A B d D F d D F LN mm inch mm inch mm inch mm inch mm mm inch mm inch mm M6X M6X1 Clockwise rotation: D Counter-clockwise rotation: S Reversible pump External Drain Standard Low Noise Standard Low Noise Standard Low Noise /4.5 D 235 /4.5LN D 235 /4.5 S 235 /4.5LN S 235 APR212/4.5 ED 235 APR212/4.5LN ED 235 /6.5 D 235 /6.5LN D 235 /6.5 S 235 /6.5LN S 235 APR212/6.5 ED 235 APR212/4.5LN ED 235 /8.5 D 235 /8.5LN D 235 /8.5 S 235 /8.5LN S 235 APR212/8.5 ED 235 APR212/8.5LN ED 235 /11 D 235 /11LN D 235 /11 S 235 /11LN S 235 APR212/11 ED 235 APR212/11LN ED 235 /15 D 235 /15LN D 235 /15 S 235 /15LN S 235 APR212/15 ED 235 APR212/15LN ED 235 /19 D 235 /19LN D 235 /19 S 235 /19LN S 235 APR212/19 ED 235 APR212/19LN ED 235 /22 D 235 /22LN D 235 /22 S 235 /22LN S 235 APR212/22 ED 235 APR212/22LN ED 235 /26 D 235 /22LN D 235 /26 S 235 /26LN S 235 APR212/26 ED 235 APR212/26LN ED /6

20 AP APR ED F Depth A B ø16 DIN6888 M12X DIA ø 5 f DIA Serie X ø DIA Gear pump material 8.32" d D ø17.67 DIA Taper 1:5 X 19 Nm Reversible pump ED - External Drain 3 h Front cover: aluminium Body: aluminium Back cover: cast iron Seals: NBR + HNBR Shaft max torque: see section Nm M1x1.5 DIN931 Tightening torque: see section M12X1.5 Depth 13 Type Displacement cm 3 /rev Dimensions Suction Pressure A B d D F d D F LN mm inch mm inch mm inch mm inch mm mm inch mm inch mm M6X M6X1 Clockwise rotation: D Counter-clockwise rotation: S Reversible pump External Drain Standard Low Noise Standard Low Noise Standard Low Noise /4.5 D 245 /4.5LN D 245 /4.5 S 245 /4.5LN S 245 APR212/4.5 ED 245 APR212/4.5LN ED 245 /6.5 D 245 /6.5LN D 245 /6.5 S 245 /6.5LN S 245 APR212/6.5 ED 245 APR212/6.5LN ED 245 /8.5 D 245 /8.5LN D 245 /8.5 S 245 /8.5LN S 245 APR212/8.5 ED 245 APR212/8.5LN ED 245 /11 D 245 /11LN D 245 /11 S 245 /11LN S 245 APR212/11 ED 245 APR212/11LN ED 245 /15 D 245 /15LN D 245 /15 S 245 /15LN S 245 APR212/15 ED 245 APR212/15LN ED 245 /19 D 245 /19LN D 245 /19 S 245 /19LN S 245 APR212/19 ED 245 APR212/19LN ED 245 /22 D 245 /22LN D 245 /22 S 245 /22LN S 245 APR212/22 ED 245 APR212/22LN ED 245 /26 D 245 /26LN D 245 /26 S 245 /26LN S 245 APR212/26 ED 245 APR212/26LN ED 245 2/6

21 AP APR ED Serie F Depth 13 A B ø16.5h DIA ø5 f DIA X B 17X14 DIN 5482 Gear pump material ø DIA 8.32" d D X Reversible pump ED - External Drain Front cover: aluminium Body: aluminium Back cover: cast iron Seals: NBR + HNBR Shaft max torque: see section 3.3 Tightening torque: see section M1x1.5 DIN Nm M12X1.5 Depth 13 Type Displacement cm 3 /rev Dimensions Suction Pressure A B d D F d D F LN mm inch mm inch mm inch mm inch mm mm inch mm inch mm M6X M6X1 Clockwise rotation: D Counter-clockwise rotation: S Reversible pump External Drain Standard Low Noise Standard Low Noise Standard Low Noise /4.5 D 237 /4.5LN D 237 /4.5 S 237 /4.5LN S 237 APR212/4.5 ED 237 APR212/4.5LN ED 237 /6.5 D 237 /6.5LN D 237 /6.5 S 237 /6.5LN S 237 APR212/6.5 ED 237 APR212/6.5LN ED 237 /8.5 D 237 /8.5LN D 237 /8.5 S 237 /8.5LN S 237 APR212/8.5 ED 237 APR212/8.5LN ED 237 /11 D 237 /11LN D 237 /11 S 237 /11LN S 237 APR212/11 ED 237 APR212/11LN ED 237 /15 D 237 /15LN D 237 /15 S 237 /15LN S 237 APR212/15 ED 237 APR212/15LN ED 237 /19 D 237 /19LN D 237 /19 S 237 /19LN S 237 APR212/19 ED 237 APR212/19LN ED 237 /22 D 237 /22LN D 237 /22 S 237 /22LN S 237 APR212/22 ED 237 APR212/22LN ED 237 /26 D 237 /26LN D 237 /26 S 237 /26LN S 237 APR212/26 ED 237 APR212/26LN ED /6

22 AP APR ED Serie F Depth 13 A B ø16.5h DIA ø5 f DIA X B 17X14 DIN 5482 ø DIA Gear pump material 8.32" d D X Reversible pump ED - External Drain Nm Front cover: aluminium Body: aluminium Back cover: cast iron Seals: NBR + HNBR Shaft max torque: see section 3.3 Tightening torque: see section M1x1.5 DIN931 M12X1.5 Depth 13 Type Displacement cm 3 /rev Dimensions Suction Pressure A B d D F d D F LN mm inch mm inch mm inch mm inch mm mm inch mm inch mm M6X M6X1 Clockwise rotation: D Counter-clockwise rotation: S Reversible pump External Drain Standard Low Noise Standard Low Noise Standard Low Noise /4.5 D 247 /4.5LN D 247 /4.5 S 247 /4.5LN S 247 APR212/4.5 ED 247 APR212/4.5LN ED 247 /6.5 D 247 /6.5LN D 247 /6.5 S 247 /6.5LN S 247 APR212/6.5 ED 247 APR212/6.5LN ED 247 /8.5 D 247 /8.5LN D 247 /8.5 S 247 /8.5LN S 247 APR212/8.5 ED 247 APR212/8.5LN ED 247 /11 D 247 /11LN D 247 /11 S 247 /11LN S 247 APR212/11 ED 247 APR212/11LN ED 247 /15 D 247 /15LN D 247 /15 S 247 /15LN S 247 APR212/15 ED 247 APR212/15LN ED 247 /19 D 247 /19LN D 247 /19 S 247 /19LN S 247 APR212/19 ED 247 APR212/19LN ED 247 /22 D 247 /22LN D 247 /22 S 247 /22LN S 247 APR212/22 ED 247 APR212/22LN ED 247 /26 D 247 /26LN D 247 /26 S 247 /26LN S 247 APR212/26 ED 247 APR212/26LN ED /6

23 AP APR ED Serie " F Depth " Shaft max torque: see section 3.3 Tightening torque: see section Gear pump material Max pressure (T max= 65 Nm) Pump bar (PSI) P1 P2 P /15 (26)(3)(33) /19 Front cover: aluminium (2)(24)(265) Body: aluminium /22 (17)(25)(235) Back cover: cast iron /26 Seals: NBR + HNBR (145)(175)(2) 2.38 d D A B X 17.6 ø.7 DIA X 38 ø OR31-7Sh ø DIA 1.5 DIA ø ø ø 18 max M M12X Depth 13 M1x1.5 DIN Nm Pump side Joint Coupling side 8 X X-X.315 DIA f7 ø DIA Reversible pump ED - External Drain X Type Displacement cm 3 /rev Dimensions Suction Pressure A B d D F d D F LN mm inch mm inch mm inch mm inch mm mm inch mm inch mm M6X M6X1 Clockwise rotation: D Counter-clockwise rotation: S Reversible pump External Drain Standard Low Noise Standard Low Noise Standard Low Noise /4.5 D 259 /4.5LN D 259 /4.5 S 259 /4.5LN S 259 APR212/4.5 ED 259 APR212/4.5LN ED 259 /6.5 D 259 AP21LN2/6.5 D 259 /6.5 S 259 /6.5LN S 259 APR212/6.5 ED 259 APR212/6.5LN ED 259 /8.5 D 259 /8.5LN D 259 /8.5 S 259 /8.5LN S 259 APR212/8.5 ED 259 APR212/8.5LN ED 259 /11 D 259 /11LN D 259 /11 S 259 /11LN S 259 APR212/11 ED 259 APR212/11LN ED 259 /15 D 259 /15LN D 259 /15 S 259 /15LN S 259 APR212/15 ED 259 APR212/15LN ED 259 /19 D 259 /19LN D 259 /19 S 259 /19LN S 259 APR212/19 ED 259 APR212/19LN ED 259 /22 D 259 /22LN D 259 /22 S 259 /22LN S 259 APR212/22 ED 259 APR212/22LN ED 259 /26 D 259 /26LN D 259 /26 S 259 /26LN S 259 APR212/26 ED 259 APR212/26LN ED /6

24 AP APR ED Serie 8S A B ø DIA ø DIA SAE J 498-9T /32 DP 5.14 G.25 FLAT ROOT SIDE FIT CLASS 1 FIT Inlet - Outlet Gear pump material Reversible pump ED - External Drain Front cover: aluminium Body: aluminium Back cover: cast iron Seals: NBR + HNBR Shaft max torque: see section 3.3 Tightening torque: see section /16 2UNF Depth 13 Type Displacement cm 3 /rev Dimensions Suction Pressure A B G G LN mm inch mm inch UNF UNF /16 12 (SAE12) 7/8 14 (SAE1) Clockwise rotation: D Counter-clockwise rotation: S Reversible pump External Drain Standard Low Noise Standard Low Noise Standard Low Noise /4.5 D 8S /4.5LN D 8S /4.5 S 8S /4.5LN S 8S APR212/4.5 ED 8S APR212/4.5LN ED 8S /6.5 D 8S /6.5LN D 8S /6.5 S 8S /6.5LN S 8S APR212/6.5 ED 8S APR212/6.5LN ED 8S /8.5 D 8S /8.5LN D 8S /8.5 S 8S /8.5LN S 8S APR212/8.5 ED 8S APR212/8.5LN ED 8S /11 D 8S /11LN D 8S /11 S 8S /11LN S 8S APR212/11 ED 8S APR212/11LN ED 8S /15 D 8S /15LN D 8S /15 S 8S /15LN S 8S APR212/15 ED 8S APR212/15LN ED 8S /19 D 8S /19LN D 8S /19 S 8S /19LN S 8S APR212/19 ED 8S APR212/19LN ED 8S /22 D 8S /22LN D 8S /22 S 8S /22LN S 8S APR212/22 ED 8S APR212/22LN ED 8S /26 D 8S /26LN D 8S /26 S 8S /26LN S 8S APR212/26 ED 8S APR212/26LN ED 8S 24/6

25 AP APR ED Serie A B X18 DIN x.78 ø DIA ø DIA Gear pump material G Inlet - Outlet ø Reversible pump ED - External Drain 1/4-28 UNF Front cover: aluminium Body: aluminium Back cover: cast iron Seals: NBR + HNBR Shaft max torque: see section 3.3 Tightening torque: see section /16 2UNF Depth 13 Type Displacement cm 3 /rev Dimensions Suction Pressure A B G G LN mm inch mm inch UNF UNF /16 12 (SAE12) 7/8 14 (SAE1) Clockwise rotation: D Counter-clockwise rotation: S Reversible pump External Drain Standard Low Noise Standard Low Noise Standard Low Noise /4.5 D 88 /4.5LN D 88 /4.5 S 88 /4.5LN S 88 APR212/4.5 ED 88 APR212/4.5LN ED 88 /6.5 D 88 /6.5LN D 88 /6.5 S 88 /6.5LN S 88 APR212/6.5 ED 88 APR212/6.5LN ED 88 /8.5 D 88 /8.5LN D 88 /8.5 S 88 /8.5LN S 88 APR212/8.5 ED 88 APR212/8.5LN ED 88 /11 D 88 /11LN D 88 /11 S 88 /11LN S 88 APR212/11 ED 88 APR212/11LN ED 88 /15 D 88 /15LN D 88 /15 S 88 /15LN S 88 APR212/15 ED 88 APR212/15LN ED 88 /19 D 88 /19LN D 88 /19 S 88 /19LN S 88 APR212/19 ED 88 APR212/19LN ED 88 /22 D 88 /22LN D 88 /22 S 88 /22LN S 88 APR212/22 ED 88 APR212/22LN ED 88 /26 D 88 /26LN D 88 /26 S 88 /26LN S 88 APR212/26 ED 88 APR212/26LN ED 88 25/6

26 AP APR ED A B Serie ø DIA ø DIA Gear pump material SAE J 498-9T /32 DP 5.14 G.25 FLAT ROOT SIDE FIT CLASS 1 FIT Inlet - Outlet Reversible pump ED - External Drain Front cover: aluminium Body: aluminium Back cover: cast iron Seals: NBR + HNBR Shaft max torque: see section 3.3 Tightening torque: see section /16 2UNF Depth 13 Displacement Dimensions Suction Pressure Type cm 3 /rev A B G G LN mm inch mm inch NPTF NPTF /2 1/ /4 1/ Clockwise rotation: D Counter-clockwise rotation: S Reversible pump External Drain Standard Low Noise Standard Low Noise Standard Low Noise /4.5 D /6.5 D /8.5 D /11 D /15 D /19 D /22 D /26 D /4.5LN D /6.5LN D /8.5LN D /11LN D /15LN D /19LN D /22LN D /26LN D /4.5 S /6.5 S /8.5 S /11 S /15 S /19 S /22 S /26 S /4.5LN S /6.5LN S /8.5LN S /11LN S /15LN S /19LN S /22LN S /26LN S APR212/4.5 ED APR212/6.5 ED APR212/8.5 ED APR212/11 ED APR212/15 ED APR212/19 ED APR212/22 ED APR212/26 ED APR212/4.5LN ED APR212/6.5LN ED APR212/8.5LN ED APR212/11LN ED APR212/15LN ED APR212/19LN ED APR212/22LN ED APR212/26LN ED 26/6

27 AP APR ED A B Serie 4X18 DIN6885 ø x DIA ø DIA Gear pump material Front cover: aluminium Body: aluminium Back cover: cast iron Seals: NBR + HNBR G Inlet - Outlet Shaft max torque: see section 3.3 Tightening torque: see section ø /4-28 UNF Reversible pump ED - External Drain 7/16 2UNF Depth 13 Displacement Dimensions Suction Pressure Type cm 3 /rev A B G G LN mm inch mm inch NPTF NPTF /2 1/ /4 1/ Clockwise rotation: D Counter-clockwise rotation: S Reversible pump External Drain Standard Low Noise Standard Low Noise Standard Low Noise /4.5 D /6.5 D /8.5 D /11 D /15 D /19 D /22 D /26 D /4.5LN D /6.5LN D /8.5LN D /11LN D /15LN D /19LN D /22LN D /26LN D /4.5 S /6.5 S /8.5 S /11 S /15 S /19 S /22 S /26 S /4.5LN S /6.5LN S /8.5LN S /11LN S /15LN S /19LN S /22LN S /26LN S APR212/4.5 ED APR212/6.5 ED APR212/8.5 ED APR212/11 ED APR212/15 ED APR212/19 ED APR212/22 ED APR212/26 ED APR212/4.5LN ED APR212/6.5LN ED APR212/8.5LN ED APR212/11LN ED APR212/15LN ED APR212/19LN ED APR212/22LN ED APR212/26LN ED 27/6

28 AP APR ED F Depth A B ø DIA Serie ø11.43 DIA Gear pump material d D SAE J 498-9T 16/32 DP FLAT ROOT SIDE FIT CLASS 1 FIT Reversible pump ED - External Drain Front cover: aluminium Body: aluminium Back cover: cast iron Seals: NBR + HNBR Shaft max torque: see section 3.3 Tightening torque: see section /16 2UNF Depth 13 Displacement Dimensions Suction Pressure Type cm 3 /rev A B d D F d D F LN mm inch mm inch mm inch mm inch mm mm inch mm inch mm M6X M6X Clockwise rotation: D Counter-clockwise rotation: S Reversible pump External Drain Standard Low Noise Standard Low Noise Standard Low Noise /4.5 D /6.5 D /8.5 D /11 D /15 D /19 D /22 D /26 D /4.5LN D /6.5LN D /8.5LN D /11LN D /15LN D /19LN D /22LN D /26LN D /4.5 S /6.5 S /8.5 S /11 S /15 S /19 S /22 S /26 S /4.5LN S /6.5LN S /8.5LN S /11LN S /15LN S /19LN S /22LN S /26LN S APR212/4.5 ED APR212/6.5 ED APR212/8.5 ED APR212/11 ED APR212/15 ED APR212/19 ED APR212/22 ED APR212/26 ED APR212/4.5LN ED APR212/6.5LN ED APR212/8.5LN ED APR212/11LN ED APR212/15LN ED APR212/19LN ED APR212/22LN ED APR212/26LN ED 28/6

29 AP APR ED Serie 28-B F Depth A B X18 DIN X.78 ø DIA ø11.43 DIA Gear pump material Front cover: aluminium Body: aluminium Back cover: cast iron Seals: NBR + HNBR Shaft max torque: see section 3.3 Tightening torque: see section d D ø /4-28 UNF 7/16 2UNF Depth 13 Reversible pump ED - External Drain Displacement Dimensions Suction Pressure Type cm 3 /rev A B d D F d D F LN mm inch mm inch mm inch mm inch mm mm inch mm inch mm M6X M6X Clockwise rotation: D Counter-clockwise rotation: S Reversible pump External Drain Standard Low Noise Standard Low Noise Standard Low Noise /4.5 D 28-B /4.5LN D 28-B /4.5 S 28-B /4.5LN S 28-B APR212/4.5 ED 28-B APR212/4.5LN ED 28-B /6.5 D 28-B /6.5LN D 28-B /6.5 S 28-B /6.5LN S 28-B APR212/6.5 ED 28-B APR212/6.5LN ED 28-B /8.5 D 28-B /8.5LN D 28-B /8.5 S 28-B /8.5LN S 28-B APR212/8.5 ED 28-B APR212/8.5LN ED 28-B /11 D 28-B /11LN D 28-B /11 S 28-B /11LN S 28-B APR212/11 ED 28-B APR212/11LN ED 28-B /15 D 28-B /15LN D 28-B /15 S 28-B /15LN S 28-B APR212/15 ED 28-B APR212/15LN ED 28-B /19 D 28-B /19LN D 28-B /19 S 28-B /19LN S 28-B APR212/19 ED 28-B APR212/19LN ED 28-B /22 D 28-B /22LN D 28-B /22 S 28-B /22LN S 28-B APR212/22 ED 28-B APR212/22LN ED 28-B /26 D 28-B /26LN D 28-B /26 S 28-B /26LN S 28-B APR212/26 ED 28-B APR212/26LN ED 28-B 29/6

30 AP Serie 2S-SAEB A Nr 2 hole.565 Inlet: M8x mm (.51") depth Outlet: M5x.8 13mm (.51 ) depth B ø DIA Gear pump material d D SAE J T 16/32 DP FLAT ROOT SIDE FIT CLASS 1 FIT. Front cover: cast iron Body: aluminium Back cover: cast iron Seals: NBR + HNBR Shaft max torque: see section 3.3 Tightening torque: see section Attention! It is not possible to change the rotation direction. Please order always with the right code Displacement Dimensions Suction Pressure Type cm 3 /rev A B d D F d D F LN mm inch mm inch mm inch mm inch mm mm inch mm inch mm M8x M5x Clockwise rotation: D Counter-clockwise rotation: S Standard Low Noise Standard Low Noise /19 D 2S-SAEB /19LN D 2S-SAEB /19 S 2S-SAEB /19LN S 2S-SAEB /22 D 2S-SAEB /22LN D 2S-SAEB /22 S 2S-SAEB /22LN S 2S-SAEB /26 D 2S-SAEB /26LN D 2S-SAEB /26 S 2S-SAEB /26LN S 2S-SAEB For availability of other displacements bodies please contact our Sales Center 3/6

31 3 Single pump customised versions Front cover Balancing plate External Balancing gears Body plate Back cover In this section, a single pump can be configured and customized. wide availability of covers, bodies, gears and seals sets provides great flexibility to pump range and allows several different pump configurations. In order to simplify the selection of the desired pump combination, a 'configurator form' is available and, by filling it out, it will guide you in the pump creation process. 31/6

32 3.1 Single pump customised versions order example A P R / 4. 5 L N - - A S - 1 C N - G H 1 - A * Function AP= single gear pump - unidirectional APR = single gear pump - reversible Series 212 Displacement 4.5= 4.4 cm 3 /rev 6.5= 6.4 cm 3 /rev 8.5= 8.4 cm 3 /rev 11= 11.1 cm 3 /rev 15= 15.1 cm 3 /rev 19= 19.2 cm 3 /rev 22= 22.2 cm 3 /rev 26= 26.2 cm 3 /rev Version Omitted if 12 teeth standard LN= 12 teeth Low Noise version Rotation S = left-hand rotation D = Right-hand rotation Omitted if reversible version Shaft end code see section 3.3 Shaft seal material type code see section Front cover series/material with/without bearing code see section and Type of ports code see section 3.5 Inlet/outlet port size code combination see section 3.5 d D Body material + seal material code see section Back cover type see section 3.6 BHRE section : Version - Progressive number (omitted) 32/6

33 3.2 Single pump dimensions C A A X Pump size A C* mm inches mm inches / / / / / / / / C*: dimensions with standard cast iron back cover with tie rod + nut. For other back covers dimension see section Front cover dimensions Front cover type German rectangular x x Front cover type mm inches mm inches European rectangular Bearing support German version Through 2 bolts SAE-A 2 bolts SAE-B 2 bolts /6

34 3.3 Shaft end code A P / S - A S - 1 C N - V E A Shaft end shape Shaft end ordering code Max torque 8 Tang drive 8 mm -.32 inches M T max = 65 Nm Straight keyed Ø 15,85 mm -.62 inches S T max = 65 Nm 1:5 Tapered shaft 1:5 G T max = 135 Nm 1:8 Tapered shaft 1:8 E T max = 135 Nm 9 Teeth external spline B17X14 DIN5482 D T max = 11 Nm 9 teeth external spline SAE J 498-9T 16/32 DP A T max = 9 Nm 11 teeth external spline SAE J T 16/32 DP T T max = 14 Nm 13 teeth external spline SAE J T 16/32 DP B T max = 27 Nm Ø 2 Ø.79 1:5 Bearing application 1:5 See section T max = 1 Nm Bearing application Ø 22 Ø. Straight 22 mm -. inches See section T max = 1 Nm 34/6

35 3.4 Front cover Shaft seal material A P / S - A S - 1 C N - V E A Shaft seal Type/material Ordering code Shaft seal pump NBR (standard) Shaft seal pump HNBR 1 FPM (VITON) 2 Shaft seal front bearing application see section /6

36 3.4.2 Front cover type A P / S - A S - 1 C N - V E A Type Alluminium Cast iron Cast iron + bearing Shape Ordering code Shape Ordering code Shape Ordering code German rectangular (Ø 8 mm inches) A B see section European rectangular (Ø 36.5 mm ) D E * Through 2 bolts (Ø 5 mm ) G H * Through 2 bolts (Ø 5 mm ) L M * Through 2 bolts (Ø 52 mm ) O P SAE-A 2 bolts (Ø mm inches) R S * SAE-B 2 bolts (Ø 11,6 mm - 4 inches) V Aluminium and cast iron front cover dimensions: see standard pumps data sheet * Please contact our Sales Department 36/6

37 3.4.3 Front bearing application X A P / S - P 1-1 C N - V E A + Ø 2 Ø.79 1:5 T max = 1 Nm X = 45 mm (1.77 inches) + Shaft seal material: HNBR = P1 + Ø 22 Ø. T max = 1 Nm Straight 22 mm -. inches X = 48.5 mm (1.91 inches) + Shaft seal material: HNBR = C1 Front bearing should be utilized in presence of radial and/or axial load. If there are radial and/or axial loads on the drive shaft, such as when it is driven by a V-belt and pulley or pair of gear wheels, it should be fitted with a front cover with supporting bearings. (See example 1 and 2 ) Depending on the pump model concerned, these supports can replace the front cover of the pump or can be fitted in addition to and over the front cover. (Example 1) (Example 2) T1 Fr Fr (N) 255, 24, 235, 21, 195, 18, 165, 15, 135, 12, 15, 9, 75, 6, Fr a Maximum radial force admitted 1h a (mm) T2 Fr (N) 16, 145, 13, 115, 1, 85, 7, 55, 4, 25, a Fr Maximum radial force admitted 5h a (mm) 37/6

38 3.5 Body For reversible pumps alternative inlet and outlet ports have the same sizes as per inlet unidirectional rotation. A P / S - A S - 1 C N - V E A Port type Ordering code Displacement Suction Dimension (mm - inch) Pressure Ordering code without All 19**-22**-26** D Port type Ordering code Displacement Suction Dimension (mm - inch) Pressure Ordering code A metric B On demand C BSPP threaded ports 4 19**-22**-26** D /8 3/8 A /2 3/8 B /4 1/2 C 19**-22**-26** 3/4 1/2 D At pressure P2 > 21 bar limited service life Nm Nm 7+5 Nm 8+5 Nm ø /8 -BSPP ø /2 -BSPP ø /4 - BSPP ø BSPP 3/8 BSPP 1/2 BSPP 3/4 BSPP 1 BSPP 38/6

39 Port type Ordering code Displacement Suction Dimension (mm - inch) Pressure Ordering code SAE threaded ports 8 all 1-1/16 12UNF (SAE12) 7/8 14UNF (SAE1) A /4 16UNF (SAE8) 3/4 16UNF (SAE8) B 19**-22**-26** 1-1/16 12UNF (SAE12) 7/8 14UNF (SAE1) D At pressure P2 > 21 bar limited service life Nm Nm Nm ø ø /4-16-UNF-2B 7/8 14 UNF-2B ø ø ø ø /4 16-UNF-2B SAE8 7/8 14-UNF-2B SAE1 1-1/16 12-UNF-2B SAE12 1 1/16-12 UNF NPTF threaded ports /2 1/2 A /4 1/2 B 19**-22**-26** 3/4 1/2 D At pressure P2 > 21 bar limited service life Nm Nm 1/2 -NPTF ø18.2 3/4 -NPTF ø23.5 1/2 NPTF 3/4 NPTF (d) (D) M6 (F) (d) (D) M6 (F) A European 4 bolt (d) (D) M8 (F) (d) (D) M6 (F) B (d) (D) M8 (F) (d) (D) M8 (F) C F d D F 8+4 Nm M6x1-6H 2+5 Nm M8x1.25-6H 39/6

40 Type Ordering code Displacement Suction Dimension (mm - inch) Pressure Ordering code (d) (D) M6 (F) A German 4 bolt flanged (2-S SAEB) (d) (D) M6 (F) (d) (D) M8 (F) (2-S SAEB) (d) (D) M6 (F) 2-S SAEB: M5 (F) B C 19**-22**-26** (d) (D) M6 (F) D M6x1-6H M8x1.25-6H Nm 2+5 Nm d D F F Other ports 9 If the requested port type is not included in the previous versions, please indicate number 9 and specify the details in the request note Body and seal materials A P / S - A S - 1 C N - V E A Body material Seal material Ordering code Aluminium alloy NBR (standard) N Aluminium alloy HNBR H 4/6

41 3.6 Back covers Nm Cast iron back cover - Standard version for unidirectional pump A P / S - A S - 1 C N - G H A Type Back cover, standard version, cast iron material Ordering code GH Cast iron back cover with drain port - Standard version for bidirectional pump " (14) (.55 ) Thread A P / A S - 1 C N - G A Type Thread Tightening torque Ordering code -6 1/4 BSP 3 +7 Nm G1 (Standard) Back cover with external drain line, cast iron material for reversible pump -5 SAE Nm G2-6 M12x Nm G3 41/6

42 3.6.3 Cast iron back cover with relief valve VI Nm P " Nm 13 T A P / S - A 1 S - 1 C A - V I * * - A Type Cast iron back cover with relief valve. Return to internal pump suction Ordering code VI** ** pressure set value (bar) - in example: VI15 = 15 bar Attention: Please take care that when the relief valve open, oil temperature increase quickly. These conditions have effect in the pump performances and life Cast iron back cover with relief valve VE Nm 24 P T Nm M18x Nm A P / S - A 1 S - 1 C A - V E * * - A Type Ordering code Cast iron back cover with relief valve. Return to external pump tank VE** ** pressure set value (bar) - in example: VE6 = 6 bar 42/6

43 3.6.5 Pressure relief valve : **VM1C VI** and VE** pressure setting range Direct acting Balanced piston Adjustable setting Four setting ranges " " 1.39" " P Max. Pressure bar *** Max flow rate... 6 l/min. Temperature range... -2/+1 C Weight: T... T.155 Kg. P 13 4 Nm (**) 24 Nm T P (**)WASHER M2X1.5 Ø " DIA (**) Assembly instruction: Check the correct position of the front copper washer and tighten with a torque wrench at the indicated value The valve can be sealed against tampering " 2.79" Option: plastic tamper proof cap code bar Pressure viscosity characteristic 46 cst at 4 C (*) (*) see performances trace/minimum pressure setting ( ) l/min The purpose of a relief valve is to keep the maximum system pressure at a safe level. When the external gear pump is supplied with pressure relief valves, the correct calibration is provided by Bucher Hydraulics S.p.A. and there are no reasons to change this value. When ordering, state in full the sheath part number, and, if the valve is to be supplied with sheath already fitted, the relief pressure setting required. *** Maximum admitted pressure value: referred to valve only. For max admitted values see pump limits. Performances Max. flow Pressure setting flow Max internal leakage Oil viscosity 6 l/min. 5 l/min 2 cm/min at 8% of nominal pressure setting 12 to 4 cst Oil temperature -2 to 1 C Recomanded filtration 21/19/16 (1 NAS 1638) Marking info: Printed code and date Spring Spring code Setting range Standard setting Q max (l/min) Type Relief valve only code - Plugged Without valve - VC bar 2 bar 3 (*) 2VM1C bar 5 bar 6 5VM1C bar 12 bar 6 12VM1C bar 15 bar 6 15VM1C bar 23 bar 6 23VM1C Pressure setting valve referred to 5 l/min 43/6

44 3.6.6 Aluminium back cover with priority valve VP M18x1.5 Q1 Q Nm 2 9 M18x A P / S - A S - 1 C N - V P * * - A ** flow set value (l/min) - in example: VP2= 2.5 l/min Type (Pmax= 21 bar) Ordering code Standard setting value +15% / -1% (l/min) Aluminium back cover with with priority valve VP** Aluminium back cover with flow regulator valve QI M18x1.5 Q Nm T A P / S - A S - 1 C N - Q I * * - A ** flow set value (l/min) - in example: QI2= 2 l/min Type (Pmax= 21 bar) Ordering code Standard setting value -1% (l/min) Aluminium back cover with flow regulator valve, internal drain QI** Aluminium back cover with flow regulator valve QE M18x1.5 Q1 T M18x Nm A P / S - A S - 1 C N - Q E * * - A 27 ** flow set value (l/min) - in example: QE6= 6 l/min Type (Pmax= 21 bar) Ordering code Standard setting value +15% (l/min) Aluminium back cover with flow regulator valve, external drain QE** /6

45 4 Multiple gear pumps The multiple external gear pumps standard version includes an intermediate cover without shaft seal between the pumps. If needed, it is possible to order a customised version with intermediate seal, see section Drive torque T max = T1 + T2 <see section 3.3> Drive gear 1st pump T imax = 1 Nm Intermediate coupling Drive gear 2nd pump p 1 V c1 T1= 1.59 T2= 1.59 η m1 p 2 V c2 η m2 p 1 V c1 T max = 1.59 η m p 2 V c2 η m2 Example: /19 + /15 p1= 2 bar p2= 1 bar M Drive gear 1st pump Intermediate coupling T max = = = 94.7 Nm 9 9 T max = Nm (taper 1:8) T 2 = 26.7 T imax 1 Nm 45/6

46 4.2 Tandem pumps dimensions (standard version without shaft seal between the pumps) C A A B A X Pump size A B C* mm inches mm inches mm inches / / / / / / / / C*: dimensions with standard cast iron back cover with tie rod + nut. For other back covers dimension see section Standard versions, dimensions example ø DIA M12x1.5 Ø DIA Example Total length: 189 mm = (X + A + B + A + A + C) Port position: mm = (X + A + B + A) 55.3 mm = (X + A) ø DIA Taper 1:5 46/6

47 4.3 Tandem pumps dimensions (special version with shaft seal between the pumps) C A A B A X Pump size A B C* mm inches mm inches mm inches / / / / / / / / C*: dimensions with standard cast iron back cover with tie rod + nut.. For other back covers dimension see section Special version, dimensions example ROTATION PRESSURE SUCTION ø Example Total length: 1.5 mm = (X + A + B + A + A + C) Port position: mm = (X + A + B + A) 5.3 mm = (X + A) 47/6

48 4.4 Triple pumps dimensions (standard version without shaft seal between the pumps) C A A B A B A X Pump size A B C* mm inches mm inches mm inches / / / / / / / / C*: dimensions with standard cast iron back cover with tie rod + nut. For other back covers dimension see section Standard versions, dimensions example ø DIA Ø DIA 6.2 ø DIA 7.2 Taper 1:5.28 Example Total length: mm = (X + A + B + A + B +A + A + C) Port position: mm = (X + A + B + A + B +A) mm = (X + A + B +A) 55.3 mm = (X + A) 48/6

49 4.5 Triple pumps dimensions (special version with shaft seal between the pumps) C A A B A B A X Pump size A B C* mm inches mm inches mm inches / / / / / / / / C*: dimensions with standard cast iron back cover with tie rod + nut. For other back covers dimension see section Special version, dimensions example Example Total length: mm = (X + A + B + A + B + A + A + C) Port position: 26.1 mm = (X + A + B + A + B + A) mm = (X + A + B + A) 5.3 mm = (X + A) 49/6

50 4.6 How to order tandem pumps (with or without shaft seal between the pumps) 1st PUMP 2nd PUMP 1st BODY 2nd BODY A P / 1 1 L N / 8. 5 L N - S - A S - 1 C N - 1 C N - V E 1 6 P 4.7 How to order triple pumps (with or without shaft seal between the pumps) 1st PUMP 2nd PUMP 3rd PUMP 1st BODY 2nd BODY 3rd BODY A P / 1 9 L N / 1 5 L N / 1 1 L N - S - A S - 1 C N - 1 C N - 1 C N - V E Function 7 Shaft seal material type code AP= single gear pump - unidirectional APR = single gear pump - reversible see section Series Front cover series/material with/without bearing code 3 Displacement see section and = 4.4 cm 3 /rev 6.5= 6.4 cm 3 /rev 8.5= 8.4 cm 3 /rev 11= 11.1 cm 3 /rev 15= 15.1 cm 3 /rev 19= 19.2 cm 3 /rev 22= 22.2 cm 3 /rev 26= 26.2 cm 3 /rev 9 Type of ports code see section Version 1 Inlet/outlet port size code combination Omitted if 12 teeth standard LN= 12 teeth Low Noise version see section 3.5 d D 5 Rotation 11 Body material + seal material code S = left-hand rotation D = Right-hand rotation Omitted if reversible version see section Shaft end code 12 Back cover type / Valve setting value see section 3.3 see section For Tandem or multiple pumps with or without shaft seal between the pumps Omitted if without shaft seal between the pumps (standard versions) P= with shaft seal between the pumps (special versions) 5/6

51 4.8 Tandem pumps dimensions + AP1 (with shaft seal between the pumps) 23 C C B A X.91" AP1 Aluminum pump, NBR standard seals T imax = 3 Nm Intermediate coupling M AP1 Pump size A mm inches mm inches B / / / / / / / / Displacement Max. Pressure (*) AP1 Pump C size cm 3 Cu. In. P1 P2 P3 /rev P. R. mm inches bar P.S.I. bar P.S.I. bar P.S.I. AP1/ AP1/ AP1/ AP1/ AP1/ AP1/ AP1/ AP1/ AP1/ IMPORTANT!: Common suction not available Attention: ( * ) The max pressure is function of max admitted intermediate torque 51/6

52 4.8.1 AP1 port types available Port type Ordering code Ø Diameter Dimension (mm - inch) Suction Pressure M6 Depth d German 4 bolt flanged 2 d D D BSPP Threaded ports 4 3/8 (Depth ) 3/8 (Depth ) Nm Nm SAE Threaded ports 8 3 /4-16 UNF-2B (SAE8) 9/16-18 UNF-2B (SAE6) Nm Nm 4.9 How to order tandem pumps + AP1 (with shaft seal between the pumps) 1st PUMP 2nd PUMP 1st BODY 2nd BODY A P / 1 1 L N - 1 / S - A S - 4 B N Function AP= single gear pump - unidirectional APR = single gear pump - reversible Series 212 and 1 Displacement 4.5= 4.4 cm 3 /rev 6.5= 6.4 cm 3 /rev 8.5= 8.4 cm 3 /rev 11= 11.1 cm 3 /rev 15= 15.1 cm 3 /rev 19= 19.2 cm 3 /rev 22= 22.2 cm 3 /rev 26= 26.2 cm 3 /rev AP1 1.2= 1.2 cm 3 /rev 1.7= 1.7 cm 3 /rev 2.5= 2.5 cm 3 /rev 3.5= 3.5 cm 3 /rev 4.3= 4.3 cm 3 /rev 5 = 5. cm 3 /rev 6.5= 6.5 cm 3 /rev 8 = 7.8 cm 3 /rev 1= 1. cm 3 /rev shaft seal material type code see section front cover series/material with/without bearing code see section and type of ports code see section 3.5 inlet/outlet port size code combination 4 version see section Omitted if 12 teeth standard LN= 12 teeth Low Noise version Rotation 11 body material + seal material code see section d D 6 S = left-hand rotation D = Right-hand rotation Omitted if reversible version shaft end code 12 AP1 type of ports code see section 3.3 see section /6

53 5 Circuits/valves option For Technical features and availability please contact our Sales Department 5.1 Load sensing circuits Load sensing valve rear cover assembly position Hydraulic scheme Family Description Code EF CF STATIC Static LS signal LSB1 LS EF CF DYNAMIC Dynamic LS signal LDB1 LS EF CF STATIC Static LS signal + check valve on CF line LSB2 LS EF CF DYNAMIC Dynamic LS signal + check valve on CF line LDB2 LS EF CF STATIC Static LS signal + relief valve on LS signal LSB3 LS EF CF DYNAMIC Dynamic LS signal + relief valve on LS signal LDB3 LS EF CF STATIC Static LS signal + check valve on CF line and relief valve on LS signal LSB4 LS EF CF DYNAMIC Dynamic LS signal + check valve on CF line and relief valve on LS signal LDB4 LS 53/6

54 5.1.2 Load sensing valve lateral assembly position Hydraulic scheme Family Description Code EF CF LS STATIC Static LS signal LSS1 EF CF LS DYNAMIC Dynamic LS signal LDS1 EF CF LS STATIC Static LS signal + check valve on CF line LSS2 EF CF LS DYNAMIC Dynamic LS signal + check valve on CF line LDB2 54/6

55 6 Rotation changing instructions For the pumps with unidirectional left (S) or right (D) rotation (not for 2S-SAEB pump) it is possible to change the rotation direction of the entire range without having to replace any component. To ensure a good technical result, we recommended in any case that such inversion should be carried out at our factory. Following we represented a procedure for the pump rotation inversion, here in example a counter-clockwise rotation pump (S). To obtain an clockwise-rotation (D) see the following pictures/instructions. Initial configuration Left (S) Pressure Suction Picture -1- Picture -2- Picture -3- Pressure Final configuration Right (D) Suction To be protected Tight with appropriate torque (see 3.6) and tighten with torque wrench Suction Pressure 55/6

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