Versa V Series Pneumatic Control Valve, 1/4" NPT, Brass, Normally Closed, VSP-3301-31
Technical overview
Versa VSP-3301-31 is a V Series brass spool valve built for directional control in industrial pneumatic circuits and other low pressure directional control duties. This configuration is a 3-way 2-position normally closed valve that is shifted by pressure pilot and returned by an internal spring, allowing dependable remote actuation without electrical coils. The valve is body ported with 1/4 in NPT threaded connections and a compact sideported external pilot construction so the pilot supply and exhaust can be routed separately to suit panel, manifold and machine installations. In normal condition the valve is normally closed to supply, and when pilot pressure is applied the spool shifts to direct supply to the working port, which is the typical operating pattern for three-way normally closed control of cylinders, actuators and vent or blow-off lines. The brass body and internal parts with Buna sealing are suitable for air, inert gas and natural gas service, with a pressure range from partial vacuum to 200 psi and a pilot pressure range of 40 to 200 psi. The primary flow capacity is 1.8 Cv and the standard temperature range is -23 to 93 C, supporting stable performance in general plant environments. Suffix -31 specifies a U-cup pilot piston seal which helps maintain consistent pilot shifting and durability over repeated cycles.
Key Features
- V Series 3-way 2-position valve with normally closed spool for dependable shutoff in the normal state
- Pressure pilot actuation with spring return for remote control without electrical coils
- 1/4 in NPT body ports in a compact brass body for panel and manifold piping
- Rated from partial vacuum to 200 psi with pilot pressure typically 40 to 200 psi
- Primary flow about 1.8 Cv for general pneumatic directional control
- Suffix -31 includes a U-cup pilot piston seal to support consistent pilot shifting
Applications
- Pneumatic actuator control and air cylinder switching
- Automation panels and machine tools requiring pilot operated directional control
- Air and inert gas distribution with normally closed exhaust or vent functions
- General industrial pneumatics where rugged brass spool valves are preferred