Proportional Control Valves

Proportional Control Valves

Hydraulic proportional valves deliver variable control of flow and pressure by responding to electrical input signals, allowing smooth and accurate motion in complex hydraulic circuits. Unlike traditional on/off valves, proportional valves enable fine-tuned performance in applications requiring load-sensitive responses, speed control, and synchronized movements.

At John Henry Foster (JHF), we offer a wide range of hydraulic proportional valves from leading manufacturers such as Bosch Rexroth and Sun Hydraulics—available in direct-operated, pilot-operated, and cartridge-style configurations.

Key Features

  • Electronically modulated control of pressure and flow

  • Compatible with analog or digital command signals (e.g., ±10V, 4–20mA, CANopen)

  • Available with or without integrated electronics (onboard amplifiers)

  • D03–D10 CETOP sizes and cartridge formats

  • High repeatability and response time for dynamic applications

Benefits

  • Smooth acceleration and deceleration of actuators

  • Precise load holding and metering

  • Improved energy efficiency through variable output

  • Ideal for closed-loop control systems

  • Reduces shock and wear in hydraulic components

  • Easily integrated with PLCs, HMIs, and motion controllers

Common Applications

  • Injection molding and die casting machines

  • Hydraulic presses and forming equipment

  • Mobile machinery with load-sensing systems

  • Aerospace ground support systems

  • Test stands and simulation rigs

  • Industrial automation with synchronized motion control