Relief assembly with reverse flow check


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

This assembly provides 2 functions. It relieves pressure from (port 1) to (port 2) when pressure at port 1 exceeds the setting of the valve and incorporates a check valve that allows reverse flow from port 2 to port 1.

Technical Data [ + ]
Body Type Line mountLine mount
Capacity 50 gpm200 L/min.
Mounting Hole Diameter .28 in.7,1 mm
Mounting Hole Depth ThroughThrough
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 [ + ]
  • 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.
  • For detailed information regarding the cartridges contained in this assembly, click on the models codes shown in the Included Components tab.
Additional Resources [ + ]