Humphrey | Proportional Control Valves

Proportional Control Valves

Proportional Control Solenoid Valves deliver variable output flow control from corresponding input current to its solenoid. The compact design of Humphrey’s ProControl™ Series is an excellent addition to any device or equipment and offers flexibility, precise control of flow, and economic advantages not available from on/off solenoid valves.

Low hysteresis
Excellent turndown ratios (resolution)
Cycle repeatability

Product Lineup

Proportional Solenoid Valves – ProControl™ Valve Series

The advanced ProControl™ Solenoid Series delivers extremely precise control and high output flow settings, and has become a standard in critical care patient ventilation equipment.

Use ProControl™ Valves to control flow:

Dynamically: for continuous high-frequency adjustments (closed-loop responses)
Incrementally: with pre-determined low-frequency adjustments within each cycle
Selectable: cycle-to-cycle selected output flow, as prescribed

Miniature Proportional Solenoid Valves

Humphrey’s PV3 and PV10 series of miniature solenoid valves deliver variable flow control of compressed air or inert gas. The 10-32 UNF ported PV3 and PV10 are available as inline or subbase mounts with low hysteresis, excellent resolution and cycle repeatability.

Small 2-Port Proportional Solenoid Valves

The 1/4 NPSF PC30 ProControl™ proportional solenoid valves deliver variable flow control of compressed air or inert gas from an input current. The rugged, compact PC30 series is flexible and may be customized with unique requirements for specific applications.

Large 2-Port Proportional Solenoid Valves

Balanced Servoid Series proportional valves provide superior pressure and flow control performance of inert gases. ProControl™ Servoid utilizes a frictionless, flat-spring armature cartridge to achieve excellent characteristics and long life with a compact construction. With this superior design, we recommend our factory assistance to calibrate Servoid Series valves to your precise requirements.

Proportional Solenoid Valve Driver

Consider the convenient Humphrey PCD Proportional Valve Driver for valve testing or workbench use. ProControl™ PCD produces appropriate current control and power supply hook up to drive any proportional valve of 1 amp or less either manually or from a signal from any data acquisition source. Additionally, drive proportional valves through PWM or constant current signals with PCD.

Inert Proportional Solenoid Valves – MiDP Series

The MiDP Series features Humphrey’s new stepper motor operator that allows for precise positioning and flow control, with outstanding repeatability and low hysteresis. The flexing diaphragm poppet design safely isolates the stepper motor from media penetration, while the inert Radel™ body material ensures long life and sustained performance.

The wetted flow path is Humphrey’s 350 Series diaphragm separated design, which has more than 20 years of proven reliability in medical industry applications such as kidney dialysis equipment and endoscope reprocessing.

The iDP Series of aggressive media solenoid valves has expanded. The diaphragm isolated 390 series 2-port proportional valve delivers a variable output flow of aggressive chemicals and cleaning fluids from a corresponding variable input current to its solenoid.

Similar to the 350 series ON/OFF direct solenoid valve in flow, size and shape, the 390 is the first of its kind in proportional control. For example, users of the 390 Series may now control liquid chemical flow “rate” under variable pressure conditions, or may vary the chemical dilution when mixing with water.