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These valves are available either with or without an integral check valve which allows free reverse flow. Flow rate through the valve is regulated by the movement of the spool, which is operated by a cam. When the spool is depressed, the flow is decreased in Normally Open type valves and increased in Normally Closed type valves. Theirprincipal use is to control the speed of actuators in machine tools and similar applications.
Instructions：
1. Flow Adjustment: Slacken the lock nut and turn the flow adjustment handle anti-clockwise to throttle flow. After achieving satisfactory performance tighten the lock nut.
2. Limit the drain port back pressure to O.lMPa. In addition, connect the drain pipe independently and directly to the tank.
3.Total Leakage at Spool Fully Closed [Viscosity: 20 mm2/s]
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