Profile: Onyx Valve Co. designs and manufactures pinch valves. We provide pinch valves from 1/2" through 24", pneumatic actuators up to 30" diameter, pressure isolator rings from 1/2" through 30" diameter, electro-pneumatic positioners, expansion joints from 1" through 24", and electronic controls related to fluid handling applications. Our rubber pinch valve sleeves are made in-house to our exact specifications. We also provide check valves, automated valves, manual valves, pressure sensors, pump controls, replacement sleeves, and expansion joints.