ACTUATOR FOR PNEUMATIC VALVE

摘要

A pneumatic valve (10) includes a housing (30) having an inlet port (22) and a delivery port (24) and an exhaust port (26) . A valve element (48) is movable in the housing (30) to control air flow between the inlet port and the delivery port and the exhaust port. The valve includes a rolling element actuator (50) for converting a rotary actuation force to linear movement of the valve element .