Pressure Relief Valve

Transcription

1 ressure Relief Valve For mounting on hydraulic pumps and motors Series ASDF and AGDF S short response times S trouble-free operation S with improved pressure-adjustment resolution S high levels of functionality and stability S low pressure increase and minimal pressure peaks S cost-saving, thanks to direct mounting on hydraulic pumps 1 roduct description 1.1 General Series AS(G) pressure relief valves regulate the operating pressure and flow rate in a hydraulic system and protect it. Regardless of the maximum operating pressure that has been set, the valve can be switched to unloaded bypass via an external pilot port. he pressure relief valves are intended for direct mounting on hydraulic pumps with SAE flange ports. he main components of the valves are a body and a pressure relief cartridge. he pressure-relief valve is a cartridge unit with a seated pilot stage and a spool-type main stage. When the pilot stage is active (R function), the pilot oil is internally drained to port, which should preferably be routed to tank with the least possible back-pressure because any pressure at port is additive to the valve setting. he required pressure can be set with an adjusting screw, which is secured by a lock nut. 1.2 Other applicable documentation odel code Fitted in nominal sizes Data sheet ressure-relief cartridge, size10 series DVA-2.. SAE 1 / 2, SAE 3 / 4 andsae echnical data General characteristics Unit Description, value ype bolt-on valve for SAE flanged ports, seated pilot stage, spool-type main stage, with remote-control port ounting method (standard) interface to SAE J518 code 61 and ISO (mounting bolts are not included in the delivery) Installation attitude unrestricted Flow rate Q max l/min 140 (see performance graph) Operating pressure bar max. 3 Opening pressure for the check valve (type R only) Adjustment range for the pressure-relief function (stepless, manually adjustable) bar 0.3 bar 1 = = = aximum permissible pressure at port bar 20 (the pressure at port is additive to the setting at the pressure-relief adjustment) Reference: EN-04 Issue: /8

2 General characteristics Unit Description, value inimum fluid cleanliness NAS 1638, class 9 or ISO 4406, code 20/18/15 Hydraulic fluid ineral oil to DIN and (other fluids on request) Viscosity range mm 2 /s Fluid temperature range C Body material GGG40 3 Symbol Standard Option with integral check valve odel AGDF only Option with external check valve odel ASDF only 4 erformance graphs (easured at 33 mm 2 /s [cst]) 4.1 p -Qpressure range bar 4.3 p -Qpressure range bar [bar] [bar] Einsatzgrenze Q[l/min] Einsatzgrenze Q[l/min] 4.2 p -Qpressure range bar [bar] 4.4 Leakage from A to B easured at pb = 0 bar, pilot stage closed Q[cm 3 /min] Einsatzgrenze 100 Q[l/min] pa [bar] 2/8 ressure Relief Valves ASDF and AGDF

3 5 Dimensions 5.1 With threaded ports (series AGDF) Size 1 / 2 ø 15 8x60 DIN ( not included in delivery, see 8.1) ø8.5 A =24 Nm Option (..-R*-..) 5A/F A =25 Nm (27 A/F) 17 A/F , =G1/2, =G1/ Size 3 / 4 and x 90 DIN ( not included in delivery see 8.1) A =24 Nm X 25 Option (..-R*-..) A/F 5A/F 45 A =25 Nm (27 A/F) + + Dimension X /4 1 1/4 1/4 22,2 26,2 47,6 52,4 ressure Relief Valves ASDF and AGDF 3/8

4 5.2 With ports for SAE pipe flanges (series ASDF) Size SAE 1 / A=24 Nm A/F A =25 Nm (27 A/F) 5A/F Size SAE 3 / 4 and 1 SAE A=48 Nm 3 RVSAE.. DSAE A/F 70 X 5A/F X A =25 Nm (27 A/F) SAE SAE 3/4 1, = G 1/4 X 22,2 26,2 47,6 52,4 1 Version with check valve and SAE pipe flang at port ( see 8.3) 2 Version with SAE pipe flang at port (see 8.2.2) 3 Version with SAE pipe flang at port (see 8.2.1) 4/8 ressure Relief Valves ASDF and AGDF

5 6 Installation information S ounting bolts for fitting the valve are not included in the delivery S Sealing ring for the flange side (pump) is included in the delivery S Required surface finish of flange pad for mounting the valve 0,01/100 Rz max 4 S ressure adjustment at the pressure relief valve: - ressure range 1: 1 turn = approx. 65 bar - ressure range 2: 1 turn = approx. 38 bar - ressure range 3: 1 turn = approx. 13 bar IORAN! When fitting the valves, use the specified tightening torque for the mounting bolts. he pressure-relief function is factory-set. he setting must be checked. AENION! Only qualified personnel with mechanical skills may carry out any maintenance work. Generally, the only work that should ever be undertaken is to check, and possibly replace, the seals. When changing seals, oil or grease the new seals thoroughly before fitting them. 7 Ordering code A G D F 2-1 / 2 - R * - 0 = 1) SAE bolt-on valve With ports for SAE J518 code 61 (ISO ) flanges With threaded ports ressure-relief function fixed setting = S = G = DF Adjustment range for the pressure-relief function: bar = bar = bar = 3 Nominal size of SAE flange G or S (SAE) 1/2 = 1/2 or threaded ports and G or S (SAE) 3/4 = 3/4 G or S (SAE) 1 = 1/1 Check valve integrated in threaded-port = R (only in models with threaded ports) Without check valve = * Remote-control port = Without port = * Design stage (to be inserted by the factory) 1) Specify the required pressure setting ( max )inplaintext. IORAN! S ounting bolts for fitting the valve are not included in the delivery, they must be ordered separately (see chapter 8.1) S Sealing ring for the flange side (pump) is included in the delivery S SAE pipe flanges and check valves for SAE flange ports must be ordered separately (see chapter 8). ressure Relief Valves ASDF and AGDF 5/8

6 8 Accessories 8.1 Cap screws for series AGDF Description Ordering code for 1 piece Data sheet Cap screws 8x60 - DIN D Cap screws 10x90 - DIN D SAE pipe flanges - max. working pressure 420 bar - interface to SAE J518 code 61 / ISO ounting bolts and O-ring are included with the delivery. hreaded pipe flanges are spot-faced for DIN 2353 pipe fittings. aterial: S SAE pipe flanges for port Ordering code hread Ordering number O. Ring, 90 Shore A Retaining screws DIN / orque Nm RF01-R08 G1/ ,24x2,62 8x30 24 RF02-R10 G3/ ,65x2,62 10x30 48 RF03-R11 G ,99x2,62 10x SAE pipe flanges for port Ordering code hread Ordering number O. Ring, 90 Shore A Retaining screws DIN / orque Nm RF01-R08 ½ ASD G1/ ,24x2,62 8x30 24 RF02-R10 ¾ ASD G3/ ,65x2,62 10x30 48 RF03-R11 1 ASD G ,99x2,62 10x SAE pipe flanges and RVSAE check valves for port Ordering code hread Ordering number O. Ring, 90 Shore A Retaining screws DIN / orque Nm RF02-R10 ¾ + RVSAE ASD G 3/ ,24x2,62 10x RF03-R RVSAE ASD G ,65x2,62 10x /8 ressure Relief Valves ASDF and AGDF

7 9 ossible ordering variants Functions Connection type ump Bolt-on valve With integral check valve With check valve for SAE port 1) Without check valve With remote-control port Without remote-control port QX2. AGDF_-1/2- x x x x hread QX3. AGDF_-3/4- x x x x QX4. AGDF_-1/1- x x x x QX2./117 ASDF_-1/2- x x x SAE J518 QX3./117 ASDF_-3/4- x x x x QX4. ASDF_-1/1- x x x x 10 Installation example 10.1 ASDF with RVSAE on series QXEH42 internal gear pump Cap screw ipe flang Insert plate Check valve Seal plate 10.2 Ordering information for example 10.1 S ressure relief valve = ASDF2-3/4-** S SAE pipe flang for port = RF02-R10 ¾ ( ) S SAE pipe flang and check valve for port = RF02-R10 ¾ + RVSAE ASD ( ) ressure Relief Valves ASDF and AGDF 7/8

8 11 Fluid he pressure relief valves require fluid with a minimum cleanliness level of NAS 1638, class 9 or ISO 4406 code 20/18/15. We recommend the use of fluids that contain anti-wear additives for mixed-friction operating conditions. Fluids without appropriate additives can reduce the service life of the valves. he user is responsible for maintaining, and regularly checking the fluid quality. 12 Fluid cleanliness class Cleanliness class (RK) onto ISO 4406 and NAS 1638 Code ISO 4406 Number of particles / 100 ml 4 m 6 m 14 m NAS /21/ /20/ /20/ /20/ /19/ /18/ /17/ /16/ /15/ /14/ /14/ /13/ /12/ /11/ info.kl@bucherhydraulics.com E 2016 by Bucher Hydraulics GmbH, D Klettgau All rights reserved. Data is provided for the purpose of product description only, and must not be construed as warranted characteristics in the legal sense. he information does not relieve users from the duty of conducting their own evaluations and tests. Because the products are subject to continual improvement, we reserve the right to amend the product specifications contained in this catalogue. Classification: /8 ressure Relief Valves ASDF and AGDF