Pressure reducing/relieving assembly, with reverse flow check

Function

Function for YPEJ
Port Designators [ + ]
Modifiers Ports
A, A/S Ports 1 & 2: 1/4" NPTF; Port 3: 1/4" NPTF;
B, B/S Ports 1 & 2: 3/8" NPTF; Port 3: 1/4" NPTF;
C, C/S Ports 1 & 2: 1/2" NPTF; Port 3: 1/4" NPTF;
D, D/S Ports 1 & 2: 3/4" NPTF; Port 3: 1/4" NPTF;
I, I/S Ports 1 & 2: SAE 6; Port 3: SAE 6;
J, J/S Ports 1 & 2: SAE 8; Port 3: SAE 6;
K, K/S Ports 1 & 2: SAE 10; Port 3: SAE 6;
U, U/S Ports 1 & 2: 3/8" BSPP; Port 3: 1/4" BSPP;
V, V/S Ports 1 & 2: 1/2" BSPP; Port 3: 1/4" BSPP;
W, W/S Ports 1 & 2: 3/4" BSPP; Port 3: 1/4" BSPP;
Technical Features [ + ]

This assembly consists of a pilot-operated pressure reducing/relieving valve which reduces 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). A reverse flow check allows free flow from port 1 to port 2.

The air signal is supplied through a port in the hex-end of the cartridge and the hydraulic setting is directly proportional to the air setting at a ratio of 20:1 (hydraulic:air).

  • Pilot operated valves exhibit exceptionally flat pressure/flow characteristics, are very stable and have low hysteresis.
Technical Data [ + ]
Body Type Line mountLine mount
Capacity 20 gpm80 L/min.
Mounting Hole Diameter .28 in.7,1 mm
Mounting Hole Quantity 22
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 [ + ]
  • The external 1/4 NPTF pilot port is part of the pressure reducing / relieving cartridge.
  • For detailed information regarding the cartridges contained in this assembly, click on the models codes shown in the Included Components tab.
  • 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 [ + ]