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Electric Butterfly Valve

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Electric Rotary Actuator 4-20mA

What is an Electric Butterfly Valve?

An electric butterfly valve is a valve that uses an electric motor to open, close, and control the flow of liquids and gases in pipelines. It's made up of a valve and an electric actuator that rotates 90 degrees. The valve is activated and closed based on the actuator's rotation.

How Does an Electric Butterfly Valve Work?

 

A butterfly valve is a valve used for flow regulation in large pipe diameters in which the disc takes the form of a disk. The operation is similar to that of a ball valve. A plate or disc is positioned in the center of the pipe. The disc has a rod passing through it that is connected to an actuator on the outside of the valve. Rotating the actuator turns the disc either parallel or perpendicular to the flow. Unlike a ball valve, the disc is always present within the flow, therefore a pressure drop is always induced in the flow, regardless of valve position.
A butterfly valve actuator controls the flow of gas or liquid by means of a disk, which turns on a diametrical axis inside a pipe or by two semicircular plates hinged on a common spindle, which permits flow in only one direction. These actuated butterfly valves offer a rotary stem movement of 90 degrees or less, in a compact design. Unlike ball valves, butterfly valves do not have any pockets in which fluids may become trapped when the valve is closed.

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Electric Rotary Actuator 90 Degrees

 

Pneumatic Wafer Butterfly Valve

Different Types of Electric Butterfly Valve

 

 

Metal bellows direct-acting electric butterfly valve

It is suitable for bottom pressure, medium and small diameter steam medium.

Plastic film direct-acting electric butterfly valve

It is suitable for midsole pressure, medium caliber gas and water medium.

The pilot-operated electric butterfly valve

It is suitable for steam, gas and water media of various pressures, specifications and temperatures. If it is made of acid-resistant stainless steel, it can be used in various corrosive media.

Pilot metal bellows electric butterfly valve

It is suitable for bottom pressure, medium and small diameter steam, gas and other media.

Pilot diaphragm electric butterfly valve

It is suitable for bottom pressure, high pressure, medium and small diameter steam or water medium.

 
How to Maintain an Electric Butterfly Valve?
1

Check the Spring: Each spring of the electric butterfly valve is only suitable for a certain range of outlet pressure, and the spring beyond this range should be replaced.

2

Working Temperature: When the working temperature of the medium is high, the pilot piston type electric butterfly valve or the pilot metal bellows type electric butterfly valve is generally used.

3

The Medium is Gas or Waters: When the medium is gas or water, the quick-acting diaphragm type electric butterfly valve or the pilot diaphragm type electric butterfly valve is generally selected.

4

The Medium is Steam: When the medium is steam, pilot piston type or pilot metal bellows type electric butterfly valve should be used.

5

Installation Guide: In order to facilitate the actual operation, adjustment and maintenance, the electric butterfly valve should generally be installed on the horizontal pipe.

 

Storage Method of Electric Butterfly Valve

 

 

Electric Three Piece Ball Valve

Keep Dry

This product should be stored in a dry and well-ventilated room. It should not be stored outdoors. The sealing ring should not be in contact with oily substances so that aging can be avoided

Electric Stainless Steel Ball Valve

Cleaning

Lids are used at both ends of the diameter to prevent dust and rust and to keep the channels clean. At both ends of the processing surface, dirt should be removed and rust inhibitors should be coated.

Electric Rotary Actuator High Torque

Preparation for Reuse

For an electric butterfly valve whose storage period is over 18 months, before installation and use, we should re-test it to ensure the integrity of the structure and function.

90 Degree Pneumatic Cylinder

Regular Checks During Storage

When placing an electric butterfly valve, make sure the electric device doesn't get crushed and the terminals don't get damaged, and avoid contact with corrosive substances. Be careful when handling to avoid damage to electrical and mechanical parts.

 

 

Tips for Installing Electric Butterfly Valve

 

Electric Stainless Steel Ball Valve

Check the Valve Disc

During installation, the valve disc should stop in the closed position.

Electric Stainless Steel Ball Valve

Check the Rotation Angle

The opening position should be determined according to the rotation angle of the butterfly plate.

Electric 3 Way Ball Valve

Check the Bypass Valves

For butterfly valves with bypass valves, the bypass valve should be opened before opening.

Electric Three Piece Ball Valve

Read the Manual

It should be installed according to the manufacturer's installation instructions. For butterfly valves with heavy weight, a firm foundation should be set up. 

 

Our Certificate
201903131647139906681CE EX for valve actuator
201904150943378510703ISO9001:2015
201903131647398225081ODL OHQ CE
201903131650059492132SIL-3 for valve actuator 01
 
Our Factory
20230913160246b8e3bf8d70564e319a890378eb55a5c2
2023091317424213d4eb8020e6402082f123c265716487
20230913160302115959621de240e5a2378f1ea9e0f347
202309131743179651752a3dcd41669ce47c229ad69e08

 

Ultimate Guide for Electric Butterfly Valve

Q: What is the control voltage of the electric valves？

A: The control voltage of the electric actuated butterfly valve typically varies depending on the type and size of the butterfly valve. Generally, most valves are designed to be operated at AC DC220V/50-60Hz, AC DC 24V, AC380V, AC480V, AC440V, or other special voltage. It is important to check the ratings of your particular model to make sure you are using the correct voltage for your application. Always consult a qualified professional in this regard to ensure you are operating within safe limits.

Q: What are the factory tests of electric valve?

A: Electric butterfly valves typically undergo a variety of factory tests before being released for sale. These tests are designed to ensure that the valve will operate as expected and meet all applicable industry standards. The tests may include pressure testing, leakage testing, flow rate testing and electro-mechanical testing. All of these tests help guarantee the quality of the product, ensuring that customers receive a reliable valve that will perform well in their application.

Q: What is a motorized butterfly valve used for?

A: Motorized butterfly valves provide a great amount of control over process media flowing through the pipelines of a system. A variety of reasons call for the need to manipulate the amount of liquid or gas flowing in a certain direction at a certain time.

Q: What is the working principle of electric butterfly valve?

A: The electric butterfly valve uses electric energy as the driving force, and the valve stem is driven by the electric device to make the butterfly plate produce a 90° rotation to achieve the opening and closing of the valve.

Q: When not to use a butterfly valve?

A: Butterfly valves are not designed to handle dry bulk solids. They were designed for gas and liquid applications. The abrasiveness of dry bulk solids erodes away on butterfly valves to the point where they no longer properly seal and need to be replaced.

Q: What is the most common use of butterfly valve?

A: Butterfly valves are used where space is limited. Unlike gate valves, butterfly valves can be used for throttling or regulating flow as well as in the full open and fully closed position. The pressure loss through a butterfly valve is small in comparison with the gate valve.

Q: What is the advantage of butterfly valve?

A: Butterfly valves are very simple in design and have minimal maintenance requirements. They are easy to install and operate. Plus, they are typically much less expensive than a ball valve of the same size. They do not require much torque to operate effectively and can be automated for energy-efficient operation.

Q: What is automatic butterfly valve?

A: Butterfly valves are a common valve type used in large diameter pipes. They are typically used for basic on/off service, but can also be effectively used to throttle flow. They are operated with a simple 90 degree turn (quarter-turn) of a disc shaped obstructor.

Q: What are butterfly valves made of?

A: Butterfly valves can be metal seated or resilient seated; in the latter case the seat is usually made of natural or synthetic rubber and is commonly fixed to the body of valves of smaller sizes or to the disc.

Q: What is the material of construction for butterfly valves?

A: ASTM A216 WCB and LCC (Low Carbon Content) steels are the most commonly used grades for butterfly valve bodies and discs (which are cast steels). They are utilized for high and low-temperature service, respectively. Stainless steels are iron, nickel, and chromium alloys with a minimum Cr content of 10.5 percent.

Q: What grade material is a butterfly valve made of?

A: The most common grades used for valve bodies and discs are cast grades ASTM A216 WCB (Weldable Cast B-grade) and LCC (Low Carbon Content) steels. WCB material is most suitable for high temperature use, whereas LCC can be used at low (sub-zero) temperatures.

Q: What material is used in butterfly valve discs?

A: Aluminum Bronze - The most widely accepted disc material used in butterfly valves, aluminum bronze is heat treatable and has the strength of steel. Formation of an aluminum oxide layer on exposed surfaces makes this metal very corrosion resistant.

Q: What is motorized butterfly valve?

A: A motorized butterfly valve operates by changing the position of a round disc that is located within a pipeline. The disc is the size of the pipe circumference, which allows it to create a reliable seal during instances when it is necessary to restrict or stop the flow of process media.

Q: What is EPDM butterfly valve?

A: A butterfly valve with a stainless steel body and disc and EPDM liner makes this valve a cost-effective solution for a wide variety of isolation applications particularly potable water duties. Manually operated, supplied with a lockable lever or gearbox.

Q: What are the main parts of a butterfly valve?

A: The key components of a butterfly valve include the body, disc, stem, seat, and actuator, each playing a critical role in regulating fluid flow through the valve. The valve body, typically made of materials like cast iron, stainless steel, or PVC, provides structural support and houses the other components.

Q: What is the difference between a flap valve and a butterfly valve?

A: Butterfly valves are also known as flap valves. The working principle of Butterfly valve consisting of a circular disc with a stem in the middle offset, while rotating the actuator, the disc turns either parallel or perpendicular and pressure drop is imparted by the disc even when its open.

Q: What is flanged butterfly valve?

A: Flanged Butterfly Valves have flanged openings. The flanges connect with flanged pipe endings. The connection with the pipe is by means of bolting.

Q: Why use a wafer butterfly valve?

A: The seal around the edge allows it to form an incredibly tight seal, keeping the risk of leaks to a minimum. They provide better flow characteristics than most other valves. It's easy to control the flow, and there's very little pressure drop.

Q: What is double flange butterfly valve?

A: The double flange refers to the connection to the pipe more than anything else. This type of butterfly valve is ideal for applications where a tight seal is required, such as water treatment plants or chemical processing facilities.

Q: What is the size range of butterfly valves?

A: Available in sizes from 50 mm (2”) to 900 mm (36“), the valve is available in Cast Iron, SG Iron and carbon steel, in a variety of body styles, materials and actuation options. 

 

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