WK 420 140 Pilot operated pressure relief valve type
Contents
1. DBWC B normally opened eal T ae PERFORMANCE CURVES measured at viscosity v 41 mm 7 5 and temperature t 50 C Operating pressure p in relation to the flow Q for valves NS10 Se ee ee kR a e e a 50 100 150 200 Q dm3 min WK 420 140 07 2011 14 Type DB PERFORMANCE CURVES measured at viscosity v 41 mm 2 5 and temperature t 50 C Operating pressure p in relation to te flow Q for valves NS20 40 100 200 300 Q dm 3 min Operating pressure p in relation to te flow Q for valves NS30 40 30 20 10 ee ee ee 0 100 200 300 400 500 600 Q dm 3 min Minimum settable pressure P min IN relation to the flow Q 2 ul Cracking pressure of the main valve standard low U P min MPa 300 500 600 650 Q dm3 min Type DB 15 WK 420 140 07 2011 HOW TO ORDER Version without pressure unloading no designation with pressure unloading W Design version complete valve no designation pilot valve with the main spool Cin state nominal size NS10 or NS30 i2. 30 DBWC10 30 dimensions of the valve cavity 7 0 01 100 a 5 42 0 05 TAX N X MINS M8 depth 13 4 holes 51 0 1 version D1 D3 1 Porting pattern on end face of the valve seat mounting bolts M8 x 40 10 9 4 pcs kit DBC10 DBWC10 10 10 in accordance with PN EN ISO 4762 tightening torque Md 37 Nm DBC30 DBWC30 30 30 2 Jet nominal nominal Type DB 11 WK 420 140 07 2011 SCHEMES Detailed and simplified symbols for complete valves versions DB detailed symbol simplified symbol version DB ss version version DB Y version DB XY WK 420 140 07 2011 12 Type DB SCHEMES Detailed and simplified symbols for complete valves versions DBW version of directional detailed symbol simplified symbol valve version DBW e DBW A normally closed aE l DB
3. depth 22 4 holes 0 01 100 mm 1 Porting pattern on subplate according to eCETOP RP 121H identified by CETOP 4 4 2 2 R06 nominal size CETOP R06 PN ISO 6264 identified by PN ISO 6264 06 09 1 97 mounting bolts M12 x 50 10 9 4 pcs kit in accordance with PN EN ISO 4762 tightening torque Md 120 Nm 2 Subplate surface required versions DB20 DBW20 23 4 max 2 holes P 1 M16 depth 26 4 holes e 33 3 55 6 66 7 134 2s 8 at 0 01 100 mm 1 Porting pattern on subplate according to CETOP RP 121H identified by CETOP 4 4 2 2 R08 nominal size CETOP R08 PN ISO 6264 identified by PN ISO 6264 08 13 1 97 mounting bolts M16 x 50 10 9 4 pcs kit in accordance with PN EN ISO 4762 tightening torque Md 310 Nm 2 Subplate surface requred versions DB30 DBW30 32 max 2 holes eo M18 depth 26 4 holes y AL 0 01 100 mm 1 Porting pattern on subplate according to eCETOP RP 121H identified by CETOP 4 4 2 2 R10 nominal size CETOP R10 PN ISO 6264 identified by PN ISO 6264 10 17 1 97 mounting bolts M18 x 50 10 9 4 pcs kit in accordance with PN EN ISO 4762 tightening torqueMd 430 Nm 2 Subplate surface r
4. In effect pressure acting on the lower side of the spool 4 is greater and the spool moves upwards what allows excess fluid to be drained to a tank and pressure in a system to be limited to the set value 07 2011 WK 420 140 DESCRIPTION OF OPERATION DBW20 A 2 52 100 x A P Pressure relief valve is also available in version with forced electrically pressure unloading Pilot valve 8 in form of a directional valve shuts off drain line before the pilot poppet in its starting position The valve functions as described before After switching directional valve 9 the chamber before the pilot 07 2011 V i poppet is connected to drain line connected to a tank The unloaded spool 4 moves upwards opening connection between P and T The valve is available in two versions depending on the pilot valve 8 closed in de energized position version DBW A or opened in de energized position version DBW B Type DB TECHNICAL DATA Hydraulic fluid mineral oil Required Filtration up to 16 um Recommended filtration up to 10 um Nominal fluid viscosity 37 mm 7s at temperature 55 C Viscosity range 2 8 up to 380 mm Z s recommended 40 C up to 55 C 20 C up to 70 C 20 C up to 70 C 20 C up to 50 C Fluid temperature range in a tank max version DB Ambient temperat
5. Pilot operated pressure relief valve type DB NS10 20 30 up to 35 MPa DATA SHEET SERVICE MANUAL PONAR wadowice APPLICATION Pressure relief valves type DB serve to limit pressure in a hydraulic system or in its part while in version DBW with pilot valve it is also used to unload pressure in a system Application example DB for setting up maximum pressure in a system DBW for actuation of a pump without pressure The valve is complied with the regulations of directive 2006 95 WE for the following voltages 50 250V for AC 75 250V for DC DESCRIPTION OF OPERATION WK 420 140 07 2011 DB20 2 52 100 Pilot operated pressure relief valve type DB consists of the pilot valve 2 and the main valve 1 Pressure in a system through line P affects the lower side of the spool 4 and via jets 9 10 11 also affects its upper side and the poppet 6 of the pilot valve At standstill the pressure is equal on both sides of the spool A spring 7 holds the spool 4 in the starting position Lines P and T are separated from each other If pressure in a system reaches the value set by the position of the Type DB 1 WK 420 140 adjustment element 5 and tension of the spring 3 of the pilot valve the pilot poppet 6 opens and fluid flows via jets 9 and 10 and opened pilot valve 2 to a tank The flow of control stream causes pressure drop at jets 9 and 10
6. W B normally opened BEEN rey eee version DBW X DBW A X normally closed PL l l ap DBW B X iy normally opened Taso i zl Se pe J version DBW Y DBW A Y normally closed q wT DBW B Y normally opened I version DBW XY DBW A XY normally closed WOH DBW B XY normally opened X I Type DB 13 WK 420 140 07 2011 SCHEMES Graphic symbols for pilot valves versions DBC DBWC version DBC version DBWC version of directional valve DBWC A normally closed ri
7. cs kit in accordance with PN EN ISO 4762 tightening torque Md 310 Nm DB30 DBW30 G410 01 WK 470 473 P T G11 4 X G1 4 G411 01 WK 470 473 P T G11 2 X G1 4 M18 x 50 10 9 4 pcs kit in accordance with PN EN ISO 4762 tightening torque Md 430 Nm EXAMPLE OF APPLICATION IN HYDRAULIC SYSTEM WK 420 140 DBW A 52 100 G24NZ4 07 2011 PONAR Wadowice S A ul Wojska Polskiego 29 34 100 Wadowice tel 48 33 488 21 00 fax 48 33 488 21 03 www ponar wadowice pl 18 PONAR wadowice Type DB
8. equired WK 420 140 07 2011 Type DB OVERALL AND CONNECTION DIMENSIONS versions for threaded connection DB10 G 20 G 30 G DD2 depth 1 2 spotfaces D3 depth T1 2 holes D1 2 holes G1 4 depth 12 a lt S al D ke N oN S 1 Adjustment 7 handknob 2 Adjustment 2 set screw with hexagon socket 3 Adjustment 3 lockable handknob 4 External port Y plug G1 4 does not occur in versions DB G Y DB G XY 5 Space required to remove the key from the lock of the adjustment item 3 version H3 H4 L1 L3 L4 L5 T1 DB10 G 10 62 85 62 31 90 14 DB20 G 10 62 85 62 31 90 18 DB30 G 13 64 72 36 99 22 Type DB WK 420 140 07 2011 OVERALL AND CONNECTION DIMENSIONS versions for threaded connection DBW10 G 20 G 30 G 3 Bee es janat 50 5 G1 4 depth 12 N nA A a c c SiS ol ol o 5 o nm AN ISPS Oo DD2 depth 1 2 spotfaces D3 depth T1 2 holes 5 Space requ adjustment 1 Adjustment 7 handknob 2 Adjustment 2 set screw wit
9. h hexagon socket 3 Adjustment 3 lockable handknob 4 External port Y plug G1 4 does not occur in versions DBW Y DBW XY Dimension for the valve with electrical connection of a directional valve 12V 24V 110V DC plug in connector type DIN 43650 ISO 4400 Dimension for the valve with electrical connection of a directional valve 110V 230V AC plug in connector type DIN 43650 ISO 4400 with rectifier ired to remove the key from the lock of the item 3 Manual override version H5 L1 DBW10 G 217 85 DBW20 G 217 85 DBW30 G 232 WK 420 140 07 2011 Type DB OVERALL AND CONNECTION DIMENSIONS pilot valve without the main spool version DBC pilot valve with the main spool 160 versions DBC10 30 Z8 4 4 holes Type DB Adjustment 7 handknob Adjustment 2 set screw with hexagon socket Adjustment 3 lockable handknob External port Y plug G1 4 does not occur in versions DBC Y DBC XY Sealing ring o ring 27 3 x 2 4 Sealing ring o ring 9 2 x 1 8 szt 2 komplet X Y Space required to remove the key from the lock of the adjustment item 3 8 Dimension for version DBC pilot valve without the main spool 9 10 Dimen
10. n the next step pilot valve without the main spool C do not state nominal size in the next step Nominal size NS Type of unloading only for versions DBW DBW G DBWC in de energized position directional valve closed A in de energized position directional valve opened B Mounting method subplate mounting no designation threaded connection Type of adjustment element handknob set screw with hexagon socket lockable handknob Series number 50 59 connection and installation dimensions unchanged 5X series 52 52 Settable pressure range upto 5 MPa up to 10 MPa upto 20 MPa up to 31 5 MPa up to35 MPa WK 420 140 07 2011 16 Type DB HOW TO ORDER Rae Further requirements in clear text to be agreed with the manufacturer Sealing NBR for fluids on mineral oil base no designation FKM for fluids on phosphate ester base V Electrical connection only for versions DBW DBW G DBWC Plug in connector DIN 43650 A ISO4400 without LED Z4 Plug in connector DIN 43650 A ISO4400 with LED ZAL Manual override for solenoid only for versions DBW DBW G DBWC solenoid without manual override no designation solenoid with manual override N Supply voltage for solenoid only for versions DBW DBW G DBWC 12V DC G12 24V DC G24 110V DC G110 110V AC 50Hz plug in connector with rectifier W110R 230V AC 50Hz plug in connector with rectifier W230R Pil
11. ot oil supply and pilot oil drain only for versions DB DBW internal pilot oil supply internal pilot oil drain no designation external pilot oil supply internal pilot oil drain X internal pilot oil supply external pilot oil drain Y external pilot oil supply external pilot oil drain XY Cracking pressure of the main valve not applicable for wersions DBC DBWC without the main spool no designation U standard low NOTES The valve should be ordered according to the above coding The symbols in bold are preferred versions in short delivery time Coding example DB10 G2 52 100 U Type DB 17 WK 420 140 07 2011 SUBPLATES AND MOUNTING BOLTS Subplates for particular versions of valve should be ordered according to subplate type taking into the account the size of thread connections given in the table below Subplates and mounting bolts must be ordered separately NOTE Subplate symbols in bold are preferred versions in short delivery time Valve type Subplate type Data sheet Thread connections of the subplate Mounting bolts DB10 DBW10 G406 01 WK 470 013 P T G 3 8 X G1 4 G407 01 WK 470 013 P T G1 2 X G1 4 M12 x 50 10 9 4 pcs kit in accordance with PN EN ISO 4762 tightening torque Md 120 Nm DB20 DBW20 G408 01 WK 450 797 P T G3 4 X G1 4 G409 01 WK 450 797 P T G1 x G1 4 M16 x 50 10 9 4 p
12. pe DB OVERALL AND CONNECTION DIMENSIONS versions for subplate mounting DBW10 20 30 3 oa 50 5 G1 4 depth 12 Adjustment 7 handknob Adjustment 2 set screw with hexagon socket Adjustment 3 lockable handknob Additional extemal port Y plug G1 4 does not occur in versions DBW Y DBW XY Sealing ring o ring 2 pcs kit P T according to table Sealing ring o ring 1 pcs kit X according to tabla Dimension for the valve with electrical connection of a directional valve 12V 24V 110V DC plug in connector type DIN 43650 ISO 4400 Dimension for the valve with electrical connection of a directional valve 110V 230V AC plug in connector type DIN 43650 ISO 4400 with rectifier 9 Space required to remove the key from the lock of the adjustment item 3 10 Manual override version o ring item 5 o ring item 6 B1 B2 oD1 D2 DBW10 17 1 x 2 6 78 54 20 14 DBW20 28 2 x 3 5 8 3 x 2 4 70 26 18 DBW30 34 5x3 5 29 20 Type DB 5 2 WK 420 140 07 2011 OVERALL AND CONNECTION DIMENSIONS versions for subplate mounting DB DBW10 20 porting pattern on subplate 30 versions DB10 DBW10 14 7 max 2 holes P T 7 depth s M12
13. sions only for versions DBC10 DBC30 pilot valve with the main spool WK 420 140 07 2011 OVERALL AND CONNECTION DIMENSIONS pilot valve without the main spool version DBWC pilot valve with the main spool versions DBWC10 30 50 5 G1 4 depth 12 stroke WK 420 140 07 2011 Adjustment 7 handknob Adjustment 2 set screw with hexagon socket Adjustment 3 lockable handknob Additional external port Y plug G1 4 does not occur in versions DBWC Y DBWC XY Sealing ring o ring 27 3 x 2 4 Sealing ring o ring 9 2 x 1 8 2 pcs kit X Y Dimension for the valve in version DBWC pilot valve without the main spool with electrical connection of a directional valve 12V 24V 110V DC plug in connector type DIN 43650 1SO 4400 Dimension for the valve in version DBWC pilot valve without the main spool with electrical connection of a directional valve 110V 230V AC plug in connector type DIN 43650 ISO 4400 with rectifier 9 10 Dimension for the valve in version DBWC10 DBWC30 pilot valve with the main spool 11 Space required to remove the key from the lock of the adjustment item 3 12 _ Manual override 10 Type DB OVERALL AND CONNECTION DIMENSIONS pilot valve with the main spool versions DBC10
14. ug in connector is not properly tightened It is forbidden to apply the valve if the plug in connector is not properly tightened to the solenoid socket and is not secured by screwing bolt tightly 5 Due to heating solenoid coil the valves should be placed in order to eliminate the possibility of incidental touch while using or they should be equipped with the coil covers in accordance with the European standards PN EN ISO 13732 1 and PN EN 982 WK 420 140 07 2011 OVERALL AND CONNECTION DIMENSIONS versions for subplate mounting DB10 20 30 1 Adjustment 7 handknob 2 Adjustment 2 set screw with hexagon socket 3 Adjustment 3 lockable handknob 4 Additional external portY plug G1 4 does not occur in versions DB Y DB XY 5 Sealing ring o ring 2 pcs kit P T according to table according to table 6 Sealing ring o ring 1 pcs kit X 7 Space required to remove the key from the lock of the adjustment item 3 version o ring item 5 o ring item 6 B1 B2 D1 D2 L1 L2 L3 L4 DB10 17 1 x 2 6 DB20 28 2 x 3 5 DB30 34 5x 3 5 8 3x2 4 78 54 20 14 90 54 70 26 18 67 34 29 20 148 89 WK 420 140 07 2011 Ty
15. ure range version DBW 35 MPa version DB Maximum operating pressure 31 5 MPa 21 MPa Maximum pressure in lines Y T version DBW 0 5 MPa 35 MPa Minimum setting pressure Maximum setting pressure 250 dm3 min 500 dm 3 min 650 dm 3 min version DBW nominal Maximum flow rate size nominal size DB DBG DBWG DBC DBWC NS10 NS20 NS30 3 1kg 4 0 kg 4 9 kg 4 9 kg 4 7 kg 5 4 kg 4 7 kg 5 6 kg 6 5 kg 6 5 kg 6 3 kg 7 0 kg 1 5 kg 1 5kg 1 5 kg 3 1kg 3 1kg 3 1kg Type of a directional valve only for versions DBW 2 DBW G DBWC WES according to data sheet WK 432 502 DC AC plug in connector with rectifier 12V 24V 110V 230V 50Hz 110V 50Hz 10 30 W IP 65 max 150 C Nominal supply voltage for solenoid Supply voltage tolerance Power requirement DC Insulation Temperature of solenoid coil ASSEMBLY AND APPLICATION REQUIREMENTS Type DB 1 Only valve working properly and suitably installed may 4 be connected to an electric system Only skilled workers are allowed to connect and disconnect electric system 2 Ground connection must be connected with protective earth wire PE in supply system according to appropriate instructions 3 It is Forbidden to apply the valve if the supply cable in the gland of pl
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