Dual cushion lock assembly with anti-cavitation checks


Function for YCCE
Port Designators [ + ]
Modifiers Ports
B, B/S Ports C1, C2, V1, V2: 3/8" NPTF; Port T: 1/2" NPTF;
C Ports C1, C2, V1, V2: 1/2" NPTF; Port T: 1/2" NPTF;
J, J/S Ports C1, C2, V1, V2: SAE 8; Port T: SAE 10;
K, K/S All Ports: SAE 10;
U, U/S Ports C1, C2, V1, V2: 3/8" BSPP; Port T: 1/2" BSPP;
V, V/S All Ports: 1/2" BSPP;
Technical Features [ + ]

This valve assembly provides overrunning load-control and load-port relief protection, Connecting the T port is optional and will supply make-up oil and may flush hot dirty oil out of the actuator. Oil coming out of the actuator may return to tank through either port T or the directional valve.

  • The counterbalance valves should be set at 1.3 times the maximum load induced pressure.
  • The term cushion in the name Cushion Lock is a misnomer. Because the counterbalance valves play a dual role as load controls and work port reliefs they must be set too high to provide any real cushion. Deceleration can only be achieved by ramping down the input flow.
  • These packages are also available as 3 letter manifolds. Look under counterbalance.
Technical Data [ + ]
Body Type Line mountLine mount
Capacity 15 gpm60 L/min.
Mounting Hole Diameter .34 in.8.6 mm
Mounting Hole Depth ThroughThrough
Mounting Hole Quantity 22
FAQs [ + ]

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.

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

Notes [ + ]
  • All SAE o-ring porting per ISO 11926. All NPTF porting per ANSI B1.20.1. All BSPP porting parallel thread.
  • 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 [ + ]