Proportional Valve

What is a Proportional Valve?

A proportional valve is an electro-hydraulic or electro-pneumatic device that provides precise control over fluid flow, pressure, or direction in proportion to an electrical input signal. Unlike on/off valves, proportional valves offer variable control, making them ideal for applications requiring smooth and accurate adjustments in industrial automation, mobile equipment, and manufacturing systems.

Key Features of Our Proportional Valves

• High Precision Control: Delivers accurate flow and pressure regulation with minimal hysteresis.
• Durability: Constructed with robust materials for long service life in harsh environments.
• Energy Efficiency: Optimized design reduces power consumption and heat generation.
• Easy Integration: Compatible with standard industrial communication protocols like CANopen, J1939, and analog/digital inputs.
• Low Maintenance: Self-cleaning mechanisms and corrosion-resistant components.

Technical Specifications

Applications of Proportional Valves

Our proportional valves are used in various industries for precise control:

• Industrial Machinery: Injection molding, press brakes, and CNC systems.
• Mobile Equipment: Excavators, agricultural machinery, and material handling.
• Automation: Robotics, assembly lines, and test stands.
• Energy Sector: Wind turbine control and hydraulic power units.

Proportional Valve FAQ

What is the difference between a proportional valve and a servo valve?
Proportional valves use proportional solenoids and are cost-effective for applications requiring good accuracy but not extreme precision. Servo valves offer higher accuracy and faster response but are more expensive and sensitive to contamination.

How do I select the right proportional valve for my application?
Consider factors like flow rate, pressure range, fluid type, input signal compatibility, environmental conditions, and required accuracy. Our technical team can assist with selection based on your specific needs.

Can proportional valves be used with aggressive fluids?
Yes, but ensure the valve materials are compatible. We offer options with seals and wetted parts made from materials resistant to chemicals and corrosion.

What maintenance is required for proportional valves?
Regular inspection for leaks, contamination checks, and ensuring clean fluid are key. Most valves have long service intervals; refer to the manual for specific guidelines.

Do proportional valves work with PLC systems?
Absolutely. They can interface with PLCs using analog signals (0-10V, 4-20mA) or digital protocols like CANopen, making integration straightforward.

What is hysteresis in proportional valves, and why does it matter?
Hysteresis is the difference in output for the same input signal when approached from different directions. Low hysteresis ensures repeatable and precise control, critical for applications like positioning and pressure regulation.

Are there options for harsh environments?
Yes, our valves with IP67 rating are dust-tight and waterproof, suitable for outdoor or washdown environments. High-temperature variants are also available.