Leak-Free Load-Control Valve NS 32, Cartridge Design

Transcription

1 Leak-Free Load-Control Valve NS 32, Cartridge Design Q max = 1 l/min, p max = 42 bar Seat-valve, two-stage hydraulic 32--C... 1 Description Whenever large loads are to be precisely moved, placed and held, when work access platforms must maintain their position, or when lock/barrage gates need to withstand high forces, then CINDY load-control valves from ucher Hydraulics are the right solution. Load-control valves in this series prevent hydraulic actuators from running ahead of the available oil supply. 2 Symbol Two-stage load-control valve and bypass check valve are functionally combined in one coaxial valve assembly Leak-free load holding Pilot ratio 1:113 The control assembly is guaranteed to close it closes even with a broken spring Various pilot-pressure ranges can be chosen Satisfies exacting demands on corrosion protection thanks to zinc-nickel coating Various types of pilot control, matched to your system, can be supplied Low-noise operation thanks to specially shaped control grooves In one valve, they combine the functions of load-holding, safety and pipe-rupture protection. Leak-free load-control valves in this series are ideally suited for use in high pressure applications up to 42 bar with a safety factor of at least 3. With a variety of optional components, the range can be extended and adapted to the requirements of the system. 2.1 Cartridge variants Variant Influenced by return-line pressure (pressure in is additive to opening pilot pressure). Variant L Not influenced by return-line pressure (drain line is required). siehe nsteuerungsvarianten see types of pilot control siehe nsteuerungsvarianten see types of pilot control L Reference: 3-P-9599-EN- Issue: /9

2 3 Technical data General characteristics Designation Design Description, value, unit Leak-free load-control valve, CINDY Cartridge design valve, two-stage hydraulic Size Nominal size 32 ounting method Factory standards (1x Cylinder screw with internal hexagon DIN 912, 1 x 22 strength category 12.9) ctuator / drive ports,, Pilot / drain ports, L Weight ounting attitude 38 mm 4 mm kg unrestricted (factory standards) (factory standards) mbient temperature range Surface Protection -2 C +8 C (others on application) Outside parts: Zinc-nickel coating ounting screws zinc-flake coated (e.g. with Geomet finish) Hydraulic characteristics aximum operating pressure aximum pressure at the flow- or return port aximum pressure at the actuator- / load port aximum pressure at the pilot port aximum flow rate Flow direction Operator type Description, value, unit 42 bar 42 bar 42 bar 42 bar 1 l/min (higher flow rates on application ), free flow through check valve, controlled flow hydraulic proportional Opening pilot ratio 1:113 Hydraulic fluid HL and HLP mineral oil to DIN ; for other fluids, please contact UCHER Hydraulic fluid temperature range Temperature rating of seals Viscosity range inimum fluid cleanliness Cleanliness class to ISO 446 : 1999 NR FK IL - 2 C + 8 C - 2 C + 8 C - 2 C + 2 C - 5 C + 8 C 1 65 mm 2 /s (cst), recommended mm 2 /s (cst) class 2/18/15 2/9

3 4 Construction and function The function of the control assembly is subdivided into the following positions: 4.1 Neutral position The load pressure and the compression spring act on the control spool in the closing direction. The valve is thus closed with no leakage. 4.2 Lifting (flow from ) The pump pressure at port opens the valve against the light compression spring and the load. The pilot spool and control spool move together in the opening direction. Oil flows from and the valve functions as a check valve. 4.3 Lowering (flow from ) The pilot pressure at port acts on the pilot piston and against the control springs. The pilot spool opens. s a result, the load pressure is discharged to port via the metering grooves in the pilot spool. The progressive characteristic of the pre-opening phase ensures that lowering begins smoothly and without jerks. If the pilot pressure at port is increased, the pilot spool opens further. The change in the pressure conditions at the control spool means that it follows the pilot spool in the opening direction. The oil flows from. Neutral position Lifting ( ) Lowering ( ) 3/9

4 4.4 Types of pilot control Cover types / application Cylinder application (external pilot signal) Cylinder application (pilot signal from opposite line) Type G Type D Type K Type H ( ) ( ) ( ) otors / Winches ( ) otors for slewing drives Legend: = recommended = can be done ( ) = conditionally possible = not possible Standard cover, type G Pilot control type G is recommended for external control, or with low-oscillation applications. With this control cover, damping orifices cannot be retrofitted. Stroke-dependent damping is not possible with this cover. Y L () Stroke-dependent damping cover, type D The type D cover is recommended for conditioning pilot signals that come from the opposite actuator line and for applications that are susceptible to oscillations. Thanks to the pilot piston's stroke-dependent damping system, oscillation-prone applications can be started in a very stable manner. The starting pressure peak is reduced because in the starting zone the valve responds quickly to the pilot signal. DD1 DD2 Y L () Stroke-dependent damping cover with metering grooves, type K The stroke-dependent damping cover with metering grooves, type K, is recommended for applications that are susceptible to oscillations, such as hydraulic motors (e.g. winches). Y ( DD1 ) L L () Hydromechanical stroke-limiting cover, type H With the type H pilot control, the stroke is limited in order to achieve a particular flow rate or speed. This reduces the valve resolution. Y General: The series-connection of the orifices allows the opening time, the closing time, the start of opening, and the full extent of opening to be matched to the requirements of the application. L () 4/9

5 5 Performance graphs measured with oil viscosity 33 mm 2 /s (cst) Δp = f (Q) Pressure drop - Flow rate characteristic Lifting ( ) Δp = f (Q) Pressure drop - Flow rate characteristic Lowering (, valve fully opened) Δp [bar] 16 P26.ai V4 V5 V63 V8 V1 Δp [bar] 4 P25.ai V4 V5 V63 V8 V Q [l/min] Q [l/min] 6 vailable modules IPORTNT!: Other control versions available on application: - Hydraulic pressure reduction, type R - Electro-proportional pressure reduction, type E 5/9

6 6.1 ody and control versions Deckel Typ / cover type G 8 (31) 23 5 t = L Deckel Typ / cover type D + K (*) = werkseitige Einstellung (*) = factory setting max Deckel Cover 7 (22 *) t = 67 - Deckel Typ / cover type H (*) = werkseitige Einstellung (*) = factory setting max (16.5 *) t = 67 6/9

7 6.2 Cavity type SCHNITT - CUT ± ±.1 17 ± ±.1 bis min. 18 to min ± (2.5) (2.5) Ra 1.6 Ra 1.6 Ra ±.1 ufnahmebohrung Variante 1 Cavity variant no Ra Detail Y L (2.5) (2.5) 49.5 ±.1 52 ±.1 92 ±.1 SCHNITT - CUT ± ± ±.3 SCHNITT - CUT () min ufnahmebohrung Variante 2 (übrige asse wie Variante 1) Cavity variant no. 2 (all other dimensions see variant no. 1) Die ohrung 7 /-2 muss mit einer ohrung 4 (radial oder axial) drucklos mit thmosphäre verbunden werden! The hole 7 /-2 must be connected to atmosphere by a hole of 4, either in axial or radial direction! (L) min. 19 ( ) min. 25 Detail Y ( 71.82) ( 71.82) Ra Ra ±.1 Einstich für -nschluss (Variante interne Verbindung) Puncture for -Port (Variant internal connection) Ra ±.1 31±.1 Einstich für L-nschluss (Variante interne Verbindung) Puncture for L-Port (Variant internal connection) 4±.1 7/9

8 7 Safety instructions 7.1 ssembly / disassembly IPORTNT!: The valve may only be used for its intended purpose within its nominal rating. If you plan to use it outside the nominal rating, you must contact the valve manufacturer. The ultimate responsibility for safety in the installation and use rests with the end machine manufacturer of the mobile application. IPORTNT!: Seal kit with the external seals is available on application. 8 pplication examples 8.1 Cylinder application CINDY 32--C with the control version type G IPORTNT!: The port threads conform to DIN 3852 T1. Use screws to DIN 912, grade 12.9, to mount the valve. Tightening torques as per the manufacturer's instructions. IPORTNT!: Protect seals and flange faces from damage. The mating flange face must be of the quality specified in the catalogue sheet! Pay attention to the port designations. 8.2 otor application CINDY 32--C with the control version type K m extern external (DD1) L Y extern external P T P T 8/9

9 9 Ordering code e.g. CINDY 32 C N O V4 G CINDY = series 32 = nominal size 32 = model / version C = cartridge design N = NR (Nitrile) seals (standard) V = FK (Viton) seals T = IL (low temperature) seals O = without mounting screws (standard) D = incl. Geomet (zinc flake) mtg. screws 1x DIN912 incl. V4 = Progressive-spool, lowering flow rate 4 l/min *) V5 = Progressive-spool, lowering flow rate 5 l/min *) V63 = Progressive-spool, lowering flow rate 63 l/min *) V8 = Progressive-spool, lowering flow rate 8 l/min *) V1 = Progressive-spool, lowering flow rate 1 l/min *) = influenced by return-line pressure in L = not influenced by return-line pressure G = standard cover D = stroke-dependent damping cover K = stroke-dependent damping cover with metering grooves H = hydromechanical stroke-limiting cover... = orifice combination (is factory-defined) *) at 33 bar Δp from. other lowering flow rates on application. IPORTNT!: Secondary pressure rerlief valve (SV) on application IPORTNT!: Other control / cover versions on application. IPORTNT!: dditional documentation and 3D models (.stp or.igs format) can be downloaded from (LOGintern area; registration is necessary) Teittinen Hydraulics Oy Hatanpään valtatie 34, FI-331 Tampere Puh: info@teittinen.fi Web: info.ch@bucherhydraulics.com by ucher Hydraulics G, CH-6345 Neuheim ll rights reserved. Data is provided for the purpose of product description only, and must not be construed as warranted characteristics in the legal sense. The information does not relieve users from the duty of conducting their own evaluations and tests. ecause the products are subject to continual improvement, we reserve the right to amend the product specifications contained in this catalogue. Classification: /9