Pilot Operated Unloading Relief Valves

Product Details

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)