Pneumatic solenoid valves can be categorized into two basic types, Direct Acting and Pilot Operated, each with characteristics and advantages, depending on your requirements.
Direct Acting Pneumatic Solenoid Valve advantages:Â
Â Â Â Â *Â Â Capable of operation under a full pressure range, including low pressure and vacuum.
Â Â Â Â *Â Â Simple, reliable construction with few parts. Low cost.
Â Â Â Â *Â Â More tolerant in poor or unstable media conditions.
Â Â Â Â *Â Â Versatile, and valves can be tailored to specific applications.
Pilot Operated Solenoid Valves use a Direct Acting Solenoid Valve as a pilot operator. The pilot operator functions to shiftÂ a larger directional control valve of piston poppet or spool design. Pilot Operated Pneumatic Solenoid Valves advantages:
Â Â Â Â *Â Â Designed primarily for efficient control of air cylinders & air actuators.
Â Â Â Â *Â Â Achieves high flow capacity relative to physical size.
Â Â Â Â *Â Â Consumes less current (amperage) relative to flow capacity.
Â Â Â Â *Â Â Many configurations to select from, particularly in four way functions.