Pilot operated, balanced piston sequence assembly with reverse flow check
|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;|
Pilot-operated, balanced piston sequence valves 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, these assemblies incorporate an integral check valve to provide reverse free flow from port 2 (sequence) to port 1 (inlet).
- All 3 port sequence cartridges are physically and functionally interchangeable (i.e. same flow path, same cavity for a given frame size).
- Pilot flow continues to increase as the pressure at port 1 (inlet), relative to the pressure at port 3 (drain), rises above the valve setting.
- Pressure at port 3 is directly additive to the valve setting at a 1:1 ratio and should not exceed 5000 psi (350 bar).
- Not suitable for use in load holding applications due to spool leakage.
- 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.
|Body Type||Line mountLine mount|
|Capacity||30 gpm120 L/min.|
|Mounting Hole Diameter||.28 in.7,1 mm|
|Mounting Hole Depth||ThroughThrough|
|Mounting Hole Quantity||22|
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.
- 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.
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