Triple relief selector assembly

Port Designators [ + ]
Modifiers Ports
J Ports P & T: SAE 8; Gage Port: SAE 6;
V Ports P & T: 1/2" BSPP; Gage Port: 1/4" BSPP;
Technical Features [ + ]

Pilot-operated, balanced-piston relief cartridges are normally closed pressure regulating valves. When the pressure at the inlet (port P) reaches the valve setting, the valve starts to open to tank (port T), throttling flow to regulate the pressure. These valves are accurate, have low pressure rise vs. flow, they are smooth and quiet, and are moderately fast. This assembly includes 3 relief valves which allows the selection of 3 separate pressure settings plus an all ports blocked position.

  • 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.
  • 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.
Technical Data [ + ]
Body Type Line mountLine mount
Capacity 25 gpm95 L/min.
Mounting Hole Diameter .28 in.7,1 mm
Mounting Hole Depth ThroughThrough
Mounting Hole Quantity 33
FAQs [ + ]

There are exactly 250 Sun drops in a cubic inch or 15 in a cc.

Direct-acting valves are used to prevent over pressure, and pilot-operated valves are used to regulate pressure. If you are unsure, use a direct-acting valve. Sun's direct acting valves are very fast, dirt tolerant, stable, and robust. Sun's pilot-operated valves are moderately fast, they have a low pressure rise vs. flow curve, and they are easy to adjust.

Notes [ + ]
  • Important: Carefully consider the maximum system pressure. The pressure rating of the manifold is dependent on the manifold material, with the port type/size a secondary consideration. Manifolds constructed of aluminum are not rated for pressures higher than 3000 psi (210 bar), regardless of the port type/size specified.
Additional Resources [ + ]