Electric Actuated Valve Manufacturer in India

An electric actuated valve has both process valves and electric actuators to enable automation of isolation, throttling, or flow control. Actuators use electrical energy to produce a precise amount of torque or force to either close or open the valves depending on the operation requirement. Speciality Valve manufactures electric actuated valve assemblies with engineered valve bodies, electric actuators, mounting systems and accessories for demanding process applications. Selection of an Electric Actuated Valve Manufacturer in India should account for valve type, actuator torque, pressure class, temperature, material and operating duty.

How Does an Electric Actuated Valve Operate?

The valve stem is actuated by an electrical actuator using quarter-turn and multi-turn action, based on the design of the valve. Quarter-turn actuation is used mainly for ball valves and butterfly valves, whereas multi-turn actuation is used for gate valves and globe valves.

The actuator can provide:

• Automatic open-close operation

• Modulating valve positioning

• Remote or local operation

• Defined limit positions

• Torque protection

• Position indication

• Manual override

• Controlled opening and closing speed

Proper actuator sizing requires consideration of breakaway torque, running torque, seating torque, stem thrust, differential pressure and operating frequency.

Electric Actuated Valve Types:

Speciality Valve manufactures electric actuated configurations for several process valve designs:

• Electric Actuated Ball Valve: Quarter-turn operation for rapid isolation and tight shut-off.

• Electric Actuated Butterfly Valve: Compact disc-operated design for isolation and flow control, particularly in larger pipelines.

• Electric Actuated Gate Valve: Multi-turn operation for full-open or full-closed pipeline isolation.

• Electric Actuated Globe Valve: Linear stem movement for throttling and controlled flow regulation.

Technical Specifications and Construction:

Final dimensions, pressure-temperature ratings and actuator requirements depend on the selected valve construction and process conditions.

Body and Trim Material Selection:

The choice of material is very important for pressure resistance, corrosion resistance, and high temperatures. Carbon Steel WCB is ideal for general process and oil and gas services, while LCB is for low temperatures. A105 forged carbon steel would be used in case of high pressures.

For corrosive services, CF8 and CF8M stainless steels offer increased corrosion resistance. F51 Duplex Stainless Steel is a strong steel that resists chlorides, whereas F55 Super Duplex is appropriate for severe corrosion and high pressures. An option for acid process media would be Alloy 20.

Design Standards:

Electric actuated valve assemblies can be engineered with reference to applicable standards, including:

• ASME B16.34 for valve construction and pressure-temperature requirements

• ISA 75 for control valve performance where applicable

• IEC 60534 for control valve requirements where applicable

• API 6D for applicable pipeline valve designs

• ISO 5211 for actuator mounting interfaces where applicable

Inspection and Testing Standards:

Depending on valve type and project specification, testing may reference API 598, ANSI FCI 70-2, IEC 60534-4 and ISO 5208. Inspection can include shell pressure testing, seat leakage testing, actuator functional testing, travel verification, torque checks and dimensional inspection.

Applications of Electric Actuated Valve:

Electric actuated valves are used for automated isolation and regulation in oil and gas, power generation, chemical processing, petrochemical plants, water systems, desalination, LNG facilities, marine installations and industrial process pipelines.

What Should You Consider When Choosing an Electric Actuated Valve? 

Valve selection should be based on the valve style, size, pressure class, PN rating, process fluid, operating temperature, torque or thrust needed, actuator duty cycle, end connection, body and trim materials, control method and testing standards. Specialty Valve can design the whole valve and actuator package based on the application pressure, temperature, flow and automation needs.