Parker PL37 4-way 3-position Hand Throttle Air Valve

Product Description

The PARKER PL37 is a manually operated, mechanically actuated directional control valve designed for pneumatic systems. It uses a hand throttle with manual return actuation to direct compressed air flow across four ports in three switching positions, giving the technician direct mechanical control over actuator movement without electrical components. With a Cv rating of 3.0 and NPT threaded connections, this valve suits light to medium industrial pneumatic circuits. A lever activation method keeps operation straightforward and tactile. Licensed mechanical contractors and industrial service technicians are the typical installers.

The PL37 is suited for compressed air distribution and directional control applications in industrial, manufacturing, and process environments. Its 4-way, 3-position configuration allows control of double-acting cylinders or other actuators requiring extend, retract, and center (exhaust or blocked) states. The lever-actuated, manual-return design is appropriate for applications where the operator must hold a position and the valve returns to center on release. Minimum rated working temperature is 18 degrees F, making it usable in cold-storage and outdoor service conditions.

Key Features

• 4-way, 3-position directional control for double-acting pneumatic actuators
• Hand throttle with manual return actuation — no electrical signal required
• Cv rating of 3.0 supports moderate compressed air flow rates
• NPT threaded ports for standard pipe or fitting connections
• Lever activation method provides direct tactile control
• Rated to a minimum working temperature of 18 degrees F

Compatibility

Designed as an OEM-style replacement or new-installation directional control valve for pneumatic systems requiring a 4-way, 3-position manually operated valve with NPT connections and a Cv rating of 3.0.

Installation Notes

Installation should be performed by a qualified pneumatic systems technician or licensed mechanical contractor. Depressurize and lock out the compressed air supply before removing or installing any valve. Verify that all port connections are made with compatible NPT fittings and that thread sealant is applied appropriately per the system requirements. Do not exceed the rated Cv or working temperature limits for the circuit.