Our company is one of the professional Pilot Operated Unloading Relief Valves manufacturers & suppliers in China
Features:
DA series pilot operated unloading valves and DBW series solenoid operated unloading valvesare used to unload the oil pumps’ pressure in a hydraulic system with accumulator. The valve allows high-pressure pump to operate and low-pressure pump to unload pressure.
Specifications:
Techinal data of DA/DAW-30 series
| Operating medium | Mineral oil-suit to NBR or FKM seal | ||||
phosphate-suit to FKM seal | |||||
Temperature range of working medium ℃ | -30~+80(NBR seal) | ||||
-20~+80(FKM seal) | |||||
Viscosity scope mm2/s | 10~800 | ||||
The oil cleanliness | The maximum oil pollution level according to NAS1638 class 9 and ISO4406 20,18,class 15 | ||||
Switching pressure scope(from T to A) | Within 17%(see the character curve) | ||||
Input pressure entrance(P~T unloading) MPa | ~35 | ||||
Mounting site | Optional | ||||
Size | 10 | 25 | 32 | ||
The maximum pressure type 17% l/min | 40 | 100 | 250 | ||
Weight | DA | kg | 3.8 | 7.7 | 13.4 |
DAW | kg | 4.9 | 8.8 | 14.5 | |
Techinal data of DA/DAW- 50 series
| Operating medium | Mineral oil-suit to NBR or FKM seals | ||||
phosphate-suit to FKM seals | |||||
Temperature range of the scope ℃ | -30~+80(NBR seals) | ||||
-20~+80(FKM seals) | |||||
Viscosity scope mm2/s | 10~800 | ||||
The oil cleanliness | The maximum oil pollution level according to NAS1638 class 9 and ISO4406 20,18,class 15 | ||||
Maximum operating pressure Chamber A MPa | 31.5 | ||||
The maximum setting pressure MPa | 5;10;20;31.5 | ||||
Mounting site | Optional | ||||
The maximum flow | 10%type | l/min | 40 | 80 | 120 |
17%type | l/min | 60 | 120 | 240 | |
Size | 10 | 25 | 32 | ||
Weight | DR | kg | 3.8 | 7.9 | 12.3 |
DR...G | kg | 5.3 | 9.4 | 13.8 | |
DRC | kg | 1.2(toward DAWC type adds 1.5kg) | |||
DRC30 | kg | 1.5(toward DAWC30type adds 1.5kg) | |||
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 Unloading Relief Valve Manufacturers |  Unloading Relief Valve Suppliers |  Unloading Relief Valve Factory |
