Created on 07/09/2015
c
2015 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 1 of 2
MODEL
RVGT
Anti Shock, ventable, pilot operated, balanced poppet relief valve
SERIES 3 / CAPACITY: 240 L/min. / CAVITY: T-17A
Ventable, pilot-operated, anti shock relief cartridges limit maximum system pressure and also limit the rate of
pressure rise. The valve opens and then ramps closed at a constant speed, independent of settings and flows.
These 3 port valves include a vent port (port 3) that connects between the main piston and the pilot stage to
provide for remote control by other pilot or 2-way valves. The adjust screw determines the maximum (relief) setting
and the minimum (threshold) setting.
TECHNICAL DATA
Factory Pressure Settings Established at 15 L/min.
Maximum Operating Pressure 350 bar
Control Pilot Flow 0,25 - 0,33 L/min.
Response Time - Typical 2 ms
U.S. Patent # 6,039,070
Pressure Ramp Up Time 300 - 500 ms
Adjustment - Number of Clockwise Turns to Increase Setting 4.5
Locknut Hex Size 15 mm
Locknut Torque 9 - 10 Nm
Seal kit - Cartridge Buna: 990-217-007
Seal kit - Cartridge Polyurethane: 990-217-002
Seal kit - Cartridge Viton: 990-217-006
(L)CONTROL
L Standard Screw Adjustment
C Tamper Resistant - Factory Set
(A)ADJUSTMENT RANGE
A 500 - 3000 psi (35 - 210 bar), 1000 psi
(70 bar) Standard Setting
B 500 - 1500 psi (35 - 105 bar), 1000 psi
(70 bar) Standard Setting
C 1000 - 6000 psi (70 - 420 bar), 1000 psi
(70 bar) Standard Setting
W 1000 - 4500 psi (70 - 315 bar), 1000 psi
(70 bar) Standard Setting
(N)SEAL MATERIAL
N Buna-N
V Viton
snhy.com/RVGT
TECHNICAL FEATURES
Because the modulating occurs inside the cartridge, these valves are immune to most of the problems associated with cavitation, namely noise and manifold
erosion.
Will accept maximum pressure at port 2; suitable for use in cross port relief circuits.
A remote pilot relief on port 3 (vent) will control the valve below its own setting.
Patents are pending for this product.
NOTES
Model Code Example: RVGTLANCONFIGURATION OPTIONS
Created on 07/09/2015
c
2015 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 2 of 2
Not suitable for use in load holding applications.
When pressure at the inlet (port 1) exceeds the threshold setting, the valve opens to tank (port 2). The pilot section moves forward at a steady rate, increasing the
setting by compressing the pilot spring. Maximum setting is achieved when the pilot section reaches a mechanical stop.
Valve provides protection for hydrostatic drives by reducing the jerk caused by sudden reversals. The valve is suitable for cross-port applications.
When used with a switching device, the valve can provide the ramp characteristic typically provided by proportional valves.
Small power units can be started against an anti shock relief to provide longer pump life.
The main stage orifice is protected against contamination.
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.
PERFORMANCE CURVES
