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.

Humphrey ProControl™ proportional valves are available in five sizes and feature:

• Low hysteresis
• Excellent turndown ratios (resolution)
• Cycle repeatability

The advanced ProControl™ Servoid 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