Product Overview

Electric Proportional Control Valve is an industrial-grade flow control device designed for precise regulation of flow, pressure, and temperature in automated process systems. It combines an electric actuator with a control valve body and operates based on analog or digital signals such as 4–20mA, 0–10V, or Modbus RTU.
It is designed for continuous modulation in closed-loop systems (PLC / DCS / BMS), ensuring stable process control under variable operating conditions.

Working Principle (Closed-loop Control System)

The valve operates in a closed-loop control system. A PLC / DCS / BMS controller calculates output using a PID algorithm and sends a proportional signal to the actuator. The actuator adjusts valve position accordingly, while a real-time position feedback system ensures accurate control.
This structure ensures stable performance even under fluctuating pressure, flow, or load conditions.

Engineering Application Cases (Verified Use Scenarios)

This valve is used in real industrial systems requiring stable modulation control:

HVAC chilled water systems in commercial buildings and district cooling plants
Chemical dosing and blending control systems in process industries
Boiler steam and condensate control loops in energy systems
Water treatment and wastewater flow regulation systems
Industrial automation systems requiring temperature and pressure stability

In HVAC applications, it helps maintain stable chilled water flow under variable load conditions, improving energy efficiency and system stability.

Key Features

High-precision proportional control (±1%–±3%)
Fully compatible with PID control systems
Real-time position feedback system
Supports 4–20mA / 0–10V / Modbus RTU
Low hysteresis electric actuator
Suitable for continuous modulation duty
IP65 / IP67 protection optional
Manual override for emergency operation
Service life ≥100,000 cycles (tested)

Engineering Design Data (Selection & System Matching)

Kv / Cv flow coefficient available for system design and sizing
Valve sizing based on flow stability and control authority
Actuator torque matched to pressure class and valve size
Optimized control response for low dead-band operation
Optional fail-safe actuator (spring return type available)
Compatible with BMS / SCADA / PLC systems

Quality Assurance (Factory Tested Reliability)

Each valve is 100% tested before shipment, including:

Pressure strength test (API 598 / EN 12266 standard)
Leakage test under rated pressure conditions
Actuator functional and stroke test
Signal response calibration test (4–20mA / Modbus)

Certifications & Compliance

ISO 9001 Quality Management System
CE compliance available (project-dependent)
API 598 / EN 12266 pressure testing standard
ISO 5211 mounting compatibility standard
Third-party inspection available (SGS / BV / TUV)

Ordering Information

Please provide the following for quotation:

Valve size (DN)
Pressure rating (PN)
Medium type
Control signal type
Power supply
Material selection
Control mode (proportional / modulating)

FAQ

Q: Is this valve suitable for PID control systems?

A: Yes, it is designed for PID-based closed-loop control systems.

Q: Can it integrate with SCADA systems?

A: Yes, Modbus RTU version supports SCADA integration.

Q: What is the service life?

A: ≥100,000 cycles under standard operating conditions.

Q: What industries use this valve?

A: HVAC, water treatment, chemical processing, and industrial automation.

Q: Do you provide technical support for selection?

A: Yes, we provide valve sizing and selection support based on flow and pressure conditions.

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