Products >> Hydraulic Valve >> SUN Hydraulic Valve

SUN Relief valve

Product No.：RVGA-LCN
Brand：SUN
Place of Origin：USA
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Product description：
Ventable, pilot-operated, balanced piston relief cartridges are normally closed pressure regulating valves. When the pressure at the inlet (port 1) reaches the valve setting, the valve starts to open to tank (port 2), throttling flow to regulate the pressure. They provide a vent port (port 3) that connects between the main piston and pilot stage to provide for remote control by other pilot or 2-way valves. These valves are accurate, have low pressure rise vs. flow, they are smooth and quiet, and are moderately fast.
A remote pilot relief on port 3 (vent) will control the valve below its own setting.
Will accept maximum pressure at port 2; suitable for use in cross port relief circuits. If used in cross port relief circuits, consider spool leakage.
Main stage orifice is protected by a 150-micron stainless steel screen.
Not suitable for use in load holding applications due to spool leakage.
Back pressure on the tank port (port 2) is directly additive to the valve setting at a 1:1 ratio.
Cartridges configured with EPDM seals are for use in systems with phosphate ester fluids. Exposure to petroleum based fluids, greases and lubricants will damage the seals.
Incorporates the Sun floating style construction to minimize the possibility of internal parts binding due to excessive installation torque and/or cavity/cartridge machining variations.

Cavity	T-17A
Series	3
Capacity	60 gpm
Maximum Operating Pressure	5000 psi
Factory Pressure Settings Established at	4 gpm
Control Pilot Flow	15 - 20 in³/min.
Maximum Valve Leakage at 110 SUS (24 cSt)	4 in³/min.@1000 psi
Response Time - Typical 10 ms	10 ms
Adjustment - No. of CW Turns from Min. to Max. setting	5
Valve Hex Size	1 1/4 in.
Valve Installation Torque	150 - 160 lbf ft
Adjustment Screw Internal Hex Size	5/32 in.
Locknut Hex Size	9/16 in.
Locknut Torque	80 - 90 lbf in.
Model Weight	1.37 lb.

Product features：

Maximum working pressure = 350 bar
The pressure of the oil port 3 is lower than the set pressure of the valve.
The pressure of the oil port 2(tank) is directly applied to the set pressure of the valve.
Voltage conduction flow = RVBA, RVCA: 0,11 L/min. to 0,16 L/min.; RVEA: 0,16 L/min. to 0,25 L/min.; RVGA, RVIA: 0,25 L/min. to 0,33 L/min.
The factory setting pressure is based on the flow rate of 15L/min.
Response time =10ms.
Maximum internal leakage = RVBA, RVCA: 32,8 cc/min/70 bar, RVEA: 49,2 cc/min/70 bar, RVGA:
65,5 cc/min/70 bar, RVIA: 81,9 cc/min/70 bar.
The minimum set pressure of RVBA is 5 bar.
Oil port 2 can withstand full pressure

Product description：


RV G A-L C N
Flow(G)	Control(L)	Adjustment range(C)	Seal Material(N)
B：30 L/min	L：Screw Adjustment	A：7 - 210 bar	N：Buna-N
C：60 L/min	C：Tamper Resistant-Factory Set	B: 3,5 - 105 bar	V：Viton
E：120 L/min	K： Handknob	C:10 - 420 bar
G: 240 L/min		N: 4 - 55 bar
		Q: 4 - 25 bar
		W:10-315bar