Proportional valve D31FHE02C1NB0047 is a pilot-operated proportional directional control valve with an electromagnetic drive structure and a built-in valve core position feedback function. The valve is designed for precise flow and direction control of industrial hydraulic systems and is suitable for high-precision scenarios such as turbine regulation, metallurgical equipment and heavy machinery. Its cast iron material structure has both strength and corrosion resistance, and its media compatibility covers industrial fluids such as mineral oil and synthetic fluids.

Structural design

1. Pilot control module: Receives electrical signals through proportional solenoids, converts them into linear mechanical displacement, and drives the main valve core to achieve flow regulation.

2. Closed-loop feedback mechanism: The integrated displacement sensor monitors the valve core position in real time, corrects the control deviation, and ensures the linear correspondence between the output and the command signal (typical hysteresis <1%).

3. Modular interface: Complies with ISO 4401 installation standards and supports valve plate integration; the electrical connection uses DIN 43563-AM6 sockets and is compatible with standard cables.

Working Principle

The command signal of Proportional valve D31FHE02C1NB0047 is processed by the proportional amplifier to generate a 0-10V or 4-20mA control current, which drives the proportional solenoid to generate thrust. This thrust overcomes the spring preload, pushes the main valve core to move, changes the oil circuit on-off ratio, and realizes stepless adjustment of flow and direction. The valve core position forms a closed-loop control through the feedback circuit, dynamically compensates for load fluctuations, and ensures system stability.

Technical advantages

- High dynamic response: short execution time (<50ms), suitable for fast adjustment scenarios.

- Wide pressure adaptation range: supports up to 315bar system pressure, covering the needs of high-pressure hydraulic circuits.

- Anti-interference design: built-in EMC protection, meeting the EN61000-6 series electromagnetic compatibility standards.

- Maintenance-friendly: standardized seals (such as O-rings, retaining rings) support quick replacement and reduce downtime costs.

Typical applications

- Generator set: actuator drive of steam turbine EH oil system.

- Industrial automation: injection molding machine mold pressure control, rolling mill roll gap adjustment.

- Engineering machinery: excavator hydraulic pump flow distribution and actuator synchronous control.

Maintenance points

1. Regular inspection: Check the valve body surface and valve core mating surface to eliminate the risk of jamming caused by rust or wear.

2. Seal replacement: All sealing components must be replaced during maintenance to avoid leakage caused by material aging.

3. Electrical calibration: Calibrate the corresponding relationship between the control signal and the valve core displacement through a special tester to ensure control accuracy.

The Proportional valve D31FHE02C1NB0047 realizes efficient and precise control of the hydraulic system by integrating mechatronics technology. Its modular design and anti-pollution ability are particularly suitable for harsh industrial environments and are the core control components of complex fluid power systems.

By the way, we have been supplying spare parts for power plants around the world for 20 years, and we have rich experience and hope to be of service to you. Looking forward to hearing from you. My contact information is as follows:

Tel: +86 838 2226655

Mobile/Wechat: +86 13547040088

QQ: 2850186866

Email: sales2@yoyik.com