Sequence assembly with reverse flow check

Function

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

This assembly consists of a pilot-operated, balanced piston sequence valve that will supply a secondary circuit with flow once the pressure at the inlet (port 1) has exceeded the valve setting. The pressure setting of a sequence valve controls the pressure at port 1 relative to the pressure at the drain (port 3). These valves are insensitive to back pressure at port 2 (sequence), up to the valve setting. They may be used to regulate pressure in place of 2-port relief valves if there is pressure in the return line. Additionally the assembly also provides a reverse flow check valve.

  • Should not be used in load holding applications.
  • Pressure at port 3 is directly additive to the valve setting at a 1:1 ratio and should not exceed 5000 psi (350 bar).
Technical Data [ + ]
Body Type Line mountLine mount
Capacity 30 gpm120 L/min.
Mounting Hole Diameter .42 in.10,7 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 [ + ]