Created on 11/27/2015
c
2015 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 1 of 2
MODEL
RQGB
Kick-down, pilot operated, balanced piston relief valve
SERIES 2 / CAPACITY: 200 L/min. / CAVITY: T-3A
Kick-down relief cartridges act similar to a circuit breaker in an electrical system. The valves will kick completely
open and remain open once the pressure at the inlet (port 1) exceeds the valve settting, creating an unrestricted
flow path from port 1 to tank (port 2). The valve remains open as long as the pressure at port 1 exceeds the
pressure at port 2. To reset the valve, flow from port 1 to port 2 must cease and pressure at port 2 must be equal to
or greater than the pressure at port 1.
TECHNICAL DATA
Factory Pressure Settings Established at Kick down point
Maximum Operating Pressure 350 bar
Response Time - Typical 25 ms
Maximum Valve Leakage at 110 SUS (24 cSt) 50 cc/min.@70 bar
Adjustment - Number of Clockwise Turns to Increase Setting 5
Locknut Hex Size 15 mm
Locknut Torque 9 - 10 Nm
Seal kit - Cartridge Buna: 990-203-007
Seal kit - Cartridge Polyurethane: 990-003-002
Seal kit - Cartridge Viton: 990-203-006
(L)CONTROL
L Standard Screw Adjustment
C Tamper Resistant - Factory Set
K Handknob
O Handknob with Panel Mount
W Hex Wrench Adjustment
(A)ADJUSTMENT RANGE
A 100 - 3000 psi (7 - 210 bar), 1000 psi
(70 bar) Standard Setting
B 50 - 1500 psi (3,5 - 105 bar), 1000 psi
(70 bar) Standard Setting
C 150 - 6000 psi (10,5 - 420 bar), 1000
psi (70 bar) Standard Setting
D 25 - 800 psi (1,7 - 55 bar), 400 psi (28
bar) Standard Setting
E 25 - 400 psi (1,7 - 28 bar), 200 psi (14
bar) Standard Setting
W 150 - 4500 psi (10,5 - 315 bar), 1000
psi (70 bar) Standard Setting
(N)SEAL MATERIAL
N Buna-N
V Viton
MATERIAL/COATING
Standard Material/Coating
/AP Stainless Steel, Passivated
snhy.com/RQGB
NOTES
Do not use in load holding applications.
For Series 1 cartridges configured with an O control (panel mount handknob), a .75 in. (19 mm) diameter hole is required in the panel.
Model Code Example: RQGBLANCONFIGURATION OPTIONS
Created on 11/27/2015
c
2015 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 2 of 2
psi (70 bar) Standard Setting
TECHNICAL FEATURES
All 2-port relief cartridges (except pilot reliefs) are physically and functionally interchangeable (same flow path, same cavity for a given frame size).
To reset valve, flow through the cartridge must cease.
Main stage orifice is protected by a 150 micron stainless steel screen.
Not suitable for use in load holding applications.
Intended for use on the actuator side of the system as flow through the valve must cease for the valve to reset. If used on the pump side of a system, pump flow
must be shut off for the valve to reset.
Back pressure on the tank port (port 2) is directly additive to the valve setting at a 1:1 ratio.
Corrosion resistant cartridge valves are intended for use in corrosive environments and are identified by the model code suffix /AP for external stainless steel
components, or /LH for external zinc-nickel plated components. See the CONFIGURATION section for all options. For further details, please see the Materials of
Construction page located under TECH RESOURCES.
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
