21800 Series Closed Loop Throttle Valve

Application The 21800 Series Closed-Loop Pneumatic Throttle Gate Valves utilize a standard HVA 21200 Series valve design with the addition of a patented throttle actuating mechanism. The throttle actuating mechanism consists of an MKS 146C Vacuum Gauge Measurement and Control System, an OMRON Analog Fiber-Optic Sensor and Amplifier, a PNEUTRONICS Pressure Control Unit and an over-sized HVA patented differential pressure actuator assembly. Shock and vibration are reduced to a minimum by our unique air cylinder design. Download Specs for more detailed information Product Features • Patented Throttle Actuating Mechanism that is infinitely variable from fully open to fully closed • Stainless steel welded bellows • Standard or custom flange options • 1,000,000 cycles before servicing (application dependent) • Furnace brazed The body and internal components are vacuum furnace brazed at 1100°C ensuring maximum joint integrity