When compressed air is admitted to the cylinder, the valve stem is pushed down to change the valve position. Valve is repositioned by spring and pressure return of a double acting cylinder. Because the valve is pushed rather than hammered to its new position, shock and excessive wear are reduced. This results in less vibration for quieter and longer operation. All valve parts are made for a long service life with minimum maintenance.
Valves are standard cast iron bodies and caps, bolted together.
Removal of cap screws allow easy access to valve operating mechanism.