iQ PFCV Proportional Valve

Our premium proportional valves for superior control.

iQ PFCV Proportional Valves

iQ Valve’s new breed of patented, solenoid operated, proportional flow control valves are unparalleled in the valve industry. Our PFCV (Proportional Flow Control Valve) line outperforms the other types of proportional valves through unique design innovations.

iQ Valve’s proportional valves have no rubbing contact surfaces which gives them low hysteresis, high frequency response, quick time response (less than 35 msec.) and long life. Since no sliding friction is encountered, the electrical drive circuit can be as simple as a straight DC electrical signal; however, a pulse-width-modulated signal can also be used. These single-stages, 2-way poppet valves will perform well even at low pressure drops.

Our patented pressure balanced designs allow us to create flow control valves that can operate, even when pressure is fluctuating. The poppet construction eliminates leakage within the working pressure ranges. The working fluid is isolated from the coil and other parts of the solenoid by an isolation diaphragm; thus, the fluid path is limited exclusively to the poppet area and the inletand outlet paths. This feature makes these valves suitable for both gases and liquids. 

Inlet Balanced

These are isolation inlet balanced proportional valves, where the main advantage of these valves is medium isolation. These valves are not outlet pressure balanced; however the diaphragm isolation on the inlet side of the valve offers isolation of the fluid or medium from the solenoid parts and offers a small internal volume. In addition, the isolation diaphragm offers pressure balancing on the inlet of the valve so the variations on the initial take off current of the valve due to inlet pressure variations are minimized. They are useful in applications where the outlet pressure doesn’t exceed 30% of the inlet pressure.

Internally Balanced

These proportional valves are pressure balanced and are insensitive to inlet and outlet pressure. Due to unique design the take-off of the valve remains consistent at different inlet pressures and they can be used with any outlet pressure. These proportional valves do not offer medium isolation.

Isolation Balanced

These proportional valves combine the advantages of both inlet balanced and internally balanced valves. These valves are pressure balanced and are insensitive to the inlet and outlet pressure. The take-off of the valve remains consistent at different inlet pressures and they can be used with any outlet pressures. These proportional valves offer isolation of the fluid medium from the solenoid and offer limited internal volume.

**Click on pictures for more data

Function: 2 Way Normally Closed


Orifice Size Range: .147” to .625”


Hysterisis: < 10%


Time Response: < 35 msec


Pressure Range: 0 - 135 PSI


Seal Material: Nitrile, FKM


Temperature Range: Nitrile: -40 to 250º F FKM: -20 to 400º F


Wetted Material: Al & 300 Series SS Fluid: Gases & Liquids


Voltage Range: 12 to 24 volts


Lead Wires: 22 AWG 12” long


Weight – Al Base: 22 – 27 Oz.