This range of bolt on valves offers very sensitive speed and directional control. One frictionless matched spool and sleeve assembly is offered with two alternative means of actuation.
Configuration
As standard these valves can be supplied with either EQUAL POWER or BIASED POWER spools, the latter is suitable for hoisting applications (normal power for lifting - reduced power for lowering).
The direction of reduced power must be stated when ordering CW or CCW, when viewed on the output shaft of the motor or geared motor.
1. Remotely Controlled (RCV) - This option is usually controlled from he remote position by one of the PC series or LC2 units. A variable air pilot signal is applied to either end of the valve spool, depending on the required direction of the motor rotation. The pilot pressure range is between 1.4bar/20psi and 4.8bar/70psi, increased pilot pressure gives increased speed. The valve spring is centred to neutral.
2. Hand Controlled (HCV) - The control valve spool is operated directly by a lever mechanism. Speed increase is obtained as the lever is moved in either direction from the centre (neutral) position.
Pressure Drop - Minimal pressure drop will be experienced through the valves, having the effect of maintaining the output torque while reducing the motor output speed by approximately 10-15% at 6 bar/90 psi at maximum power. The starting torque remains unaffected.
