Rack & Pinion Pneumatic Actuator by Good Supplier Inc. Rack and Pinion Actuators are for automation and operation of quarter-turn valves like Butterfly, Ball, and Plug valves as used in process industries like chemical, pharmaceutical, water processing, oil & gas, etc. The Actuators are available in two constructions: Spring Return and Double Acting. Mechanical Spring Return is for fail-safe applications and can be assembled for the “Fail-Close” or “Fail-Open” safety function. Visit our website goodsupplierglobal.com and contact us with your order at sales@goodsupplier-global.com