Parker Model 001, 002 And 003A Mass Flow Control Valve

The Porter Instrument Models 001, 002, and 003A Mass Flow Control Valves are normally closed, proportional solenoid control valves. When coupled with a Porter Instrument Mass Flowmeter, a closed-loop control system is achieved which permits separate component (flowmeter and control valve) configuration.

Models 001 and 002 consist of a valve body, valve sleeve, D.C. coil, internal valve assembly complete with an elastomeric valve seat and an orifice. Flow is regulatedby varying the valve drive voltage to the D.C. coil, which creates a magnetic field lifting the internal valve assembly from the orifice to allow gas flow control.

While similar to Models 001 and 002, additionally the Model 003A Mass Flow Control Valve, designed for high flows, incorporates a pilot-operated valve design. The pilot valve, consisting of a spring-loaded diaphragm assembly and orifice system, controls the pressure differential across the diaphragm assembly, which lifts the main plunger off the orifice permitting gas flow.