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Pilot-operated, pressure reducing/relieving valve
Cavity: T-19A | Capacity:
See CAD Files tab below to request images.
Technical specifications
Pilot-operated, pressure reducing/relieving valves reduce a high primary pressure at the inlet (port 2) to a constant reduced pressure at port 1, with a full-flow relief function from port 1 to tank (port 3).
- Pressure at port 3 is directly additive to the valve setting at a 1:1 ratio and should not exceed 3000 psi (210 bar).
- Maximum pressure at port 3 should be limited to 3000 psi (210 bar).
- Recommended maximum inlet pressure is determined by the adjustment range. Ranges D, E, N, and Q are tested with a 2000 psi (140 bar) maximum differential between inlet and reduced pressure. Ranges A, B, and H are tested with a 3000 psi (210 bar) maximum differential between inlet and reduced pressure. Ranges C and W are tested with 5000 psi (350 bar) of inlet pressure.
- Pilot operated valves exhibit exceptionally flat pressure/flow characteristics, are very stable and have low hysteresis.
- Pilot operated reducing, reducing/relieving valves by nature are not fast acting valves. For superior dynamic response, consider direct acting valves.
- All three-port pressure reducing and reducing/relieving cartridges are physically interchangeable (i.e. same flow path, same cavity for a given frame size). When considering mounting configurations, it is sometimes recommended that a full capacity return line (port 3) be used with reducing/relieving cartridges.
- Full reverse flow from reduced pressure (port 1) to inlet (port 2) may cause the main spool to close. If reverse free flow is required in the circuit, consider adding a separate check valve to the circuit.
- If pilot flow consumption is critical, consider using direct acting reducing/relieving valves.
- 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
- Series
- Capacity80 gpm
- Maximum Operating Pressure5000 psi
- Control Pilot Flow15 - 20 in³/min.
- Factory Pressure Settings Established atblocked control port (dead headed)
- Adjustment - No. of CW Turns from Min. to Max. setting5
- Valve Hex Size1 5/8 in.
- Valve Installation Torque350 - 375 lbf ft
- Adjustment Screw Internal Hex Size5/32 in.
- Locknut Hex Size9/16 in.
- Locknut Torque80 - 90 lbf in.
- Model Weight3.10 lb
- Seal kit - Cartridge
- Seal kit - Cartridge
- Seal kit - Cartridge
What parts of the Sun cartridge valve are field serviceable?
What are the tolerances on pressure settings for Sun's pressure control valves?
I need a reducer on B. Can I connect the drain to A?
How big is a drop of hydraulic oil?
What do you mean by maximum differential?
Direct acting or pilot operated - what do I use?
Will your reducing/relieving valve relieve my pump to tank?
Can I back flow through a reducing valve from port 1 to port 2?
- Maximum pressure differentials for spring ranges: A and B are 3000 psi (210 bar) N and Q are 2000 psi (140 bar) W is 5000 psi (350 bar)inlet pressure
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