Red Valve”sType A pinch valve features a full-port opening and straight-throughflow path to eliminate turbulence when open. The simple, two-piece bodyacts as a built-in pneumatic actuator.  Fabricated elastomersleeves offer maximum wear resistance and sealing on entrappeddebris.  Double-wall and cone sleeves are also available forextremely abrasive and high-pressure applications. The Type A is theoriginal air-operated pinch valve, designed by Red Valve in 1953 forthe world’s first coal slurry pipeline.