RQIBCDV/AP - Kick-down, pilot operated, balanced piston relief valve

Part Number: RQIBCDV/AP

Manufacturer: Sun Hydraulics

DESCRIPTION:

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.

  • 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.

CavityT-16A
Series3
Capacity100 gpm380 L/min.
Factory Pressure Settings Established atKick down pointKick down point
Maximum Operating Pressure5000 psi350 bar
Response Time - Typical25 ms25 ms
Maximum Valve Leakage at 110 SUS (24 cSt)4 in³/min.@1000 psi65 cc/min.@70 bar
Adjustment - Number of Clockwise Turns to Increase Setting55
Valve Hex Size1 1/4 in.31,8 mm
Valve Installation Torque150 - 160 lbf ft203 - 217 Nm
Adjustment Screw Internal Hex Size5/32 in.4 mm
Locknut Hex Size9/16 in.15 mm
Locknut Torque80 - 90 lbf in.9 - 10 Nm
Model Weight1.20 lb0,55 kg
Seal kit - CartridgeViton: 990-016-006

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Additional Resources



Notes:
  • Do not use in load holding applications.

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