Electric regulating valve are core actuators in industrial automation control systems, precisely assembled from an electric actuator and a valve body. Driven by electrical energy, they continuously adjust the valve opening, accurately controlling key parameters such as flow rate, temperature, and pressure of pipeline media. They are widely used in petrochemical, power, metallurgical, and environmental protection industries.
Compared to traditional pneumatic regulating valves, electric regulating valves offer significant advantages such as energy saving and environmental friendliness (consuming electricity only during operation) and convenient installation (no pneumatic piping required), making them an important choice for modern industrial automation upgrades.
GNEE Group specializes in the production of valves. Please contact us to obtain the drawings.
Technical specifications
Size: 1 "-4", DN25-DN100
Material: 304 / 316L
Pressure: 10bar
Temperature: -30 to 150 ℃
Electric Regulating Valve Structure
An electric regulating valve is constructed by mechanically connecting and assembling an electric actuator and a regulating valve, followed by commissioning and installation.
Main Components of an Electric Regulating Valve
Component Materials: Valve body, valve cover, packing gland, valve stem, valve disc, sealing ring, indicator, valve stem nut, nut sleeve
Materials: Gray cast iron, cast steel, stainless steel, brass
Working Principle of an Electric Regulating Valve
Power Supply: DC24V, AC220V, AC380V, etc.
Input Control Signal: DC4-20mA or DC1-5V
Feedback Control Signal: DC4-20mA (load resistance below 500 ohms)
The valve receives signals (e.g., 4~20mA) from industrial automation control systems to drive the valve, changing the cross-sectional area between the valve core and seat to control process parameters such as flow rate, temperature, and pressure of the pipeline medium. This achieves automated regulation.
The new type of electric regulating valve actuator incorporates a servo function, accepting a standardized 4-20mA or 1-5V DC signal. It converts the current signal into a corresponding linear displacement, automatically controlling the valve opening to achieve continuous regulation of process parameters such as pressure, flow rate, temperature, and level of the fluid in the pipeline.
Electric Regulating Valve Flow Characteristics
The flow characteristic of an electric regulating valve is the relationship between the relative flow rate of the medium passing through the valve and its opening degree, under the condition that the pressure difference across the valve remains constant.
There are three types of flow characteristics for electric regulating valves: linear, equal percentage, and parabolic.
Electric Regulating Valve Application Areas
Industrial automation systems in power, chemical, metallurgical, environmental protection, water treatment, light industry, and building materials industries.
Electric Regulating Valve Installation
The electric regulating valve is best installed with the upper end of the working piston below a horizontal pipeline. The temperature sensor can be installed in any position, but its entire length must be immersed in the controlled medium.
Electric regulating valves generally include an actuator, which receives signals (0-10V or 4-20mA) to control the valve for regulation. They can also be integrated into intelligent network control systems to optimize control and achieve remote monitoring, depending on control needs.
Electrical Principle of Electric Regulating Valve:
Operating Principle: The motor is powered by 220VAC or 380VAC, with a control signal of 4~20mA. The valve contains a controller that converts the current signal into a stepper motor's angular stroke signal. The motor rotates, driving the valve stem via gears, levers, or a combination of gears and levers, achieving linear or angular stroke.
Feedback: The motor's operation, through gear rotation, outputs a valve positioning signal via a three-connector sliding rheostat. Additionally, there are three limit signals (fully open, fully closed, common line).
Classification of Electric Regulating Valves:
ZAZP type electric straight-through single-seat regulating valve
ZAZN type electric straight-through double-seat regulating valve
ZAZM/P type electric sleeve regulating valve
ZAZQX type electric three-way confluence (diversion) regulating valve
ZAZS type electric angle regulating valve
ZAZS type electric angle regulating valve
Electric regulating valve factory
GNEE Group owns hundreds of valve production and testing equipment, and provides customized valve services-send us your drawings, and we'll tailor-make them for you.