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Butterfly valves are quarter-turn valves i.e. just a quarter turn takes the valve from fully open to fully closed position. They are simple in design, very simple to use and allows quick opening and closure.
They are light in weight, have a small installation footprint, lower costs and availability in very large sizes. These valves can be operated by handles, gears or automatic actuators.
Butterfly valves are not just easy to operate but are also less complicated and simpler than a ball valve.
A butterfly valve can very easily replace a ball valve, making the operation of a plantless complicated.
If you are looking for compact, easy-to-operate and long-lasting valves for your machinery plant, a butterfly valve is perfect.
The valves can be operated by handles, levers, gears or actuators according to a specific need.
How Does A Butterfly Valve Operate
The ‘butterfly’ in the butterfly valve is actually a disc which is connected to a turning rod. When the rod is rotated, the disc turns allowing or blocking the flow of liquid and gas.
Advantages of Butterfly Valves
Here are some of the most popular advantages of butterfly valves.
- Extended neck for easy operation
- Cost effective
- Fire friendly
- Zero disc distraction
- Sturdy liners
- Low maintenance
Application of Butterfly Valves
Usually, industries that have machinery plant working under high pressure and temperature or steam, water and vacuum services prefer installing butterfly valves in their plant.
- Butterfly valves commonly finds applications in in circulation of water or for fire protection.
- They can be used for cooling water, air and gases. .
- They are also used for waste water treatment, fire protection, gas supply and municipal water supply. .
- They are used in chemical and oil industries in fuel handling systems, power generations, etc. .
- Other industries that prefer using butterfly valves for theirplantare food processing, chemical and pharmaceutical services. .
Types of Butterfly Valves
Mainly, there are 2 types of Butterfly Valves–Concentric (centric)& Eccentric.
Concentric:
The most basic type of butterfly valve design is a centric or concentric butterfly valve.
In this the stem passes through the centerline of the disc which is in the center of the pipe bore and the seat is the inside diameter periphery of the valve body.
There is zero-offset in such type of valves and is also called as resilient-seated because it relies on the flexibility of the seat rubber to have efficiently seal the flow when closed.
In this type of valve, the disc first comes into contact with the seat at around 85° during a 90° rotation.
Concentric butterfly valves are commonly used for low pressure rangeapplication.
Eccentric:
In eccentric butterfly valves, the stem does not pass through the centerline of the disc, but instead behind it (opposite of flow direction) at an offsetpoint.
When the stem is located right behind the centerline of the disc, the valve is called single-offset. This design reduces the disc contact with the seal before full closure of the valve thus improving service life of the valve.
Today, double offset and triple offset butterfly valves are also popular.
Why Is Forxar Industries The Best Manufacturer Of Butterfly Valves In India
We’ve been making simple and cost-effective butterfly valves for 30+ years now.
To meet the industry’s unique demands, our butterfly valves come in a variety of elastomer-disc combinations. It is available in a variety of sizes, material and actuation options.
The ultimate focus is on designing a product that is long-lasting, sustainable and stronger than those already available in the market.
At Forxar Industries, we are 100% committed to quality, precision and customer satisfaction. We are the pioneers in the mechanical engineering sector especially in the Pipes, Tubes, Flanges &Valves areas.
Wish to know more about Forxar Butterfly Valves? Download a FREE eBook.
FAQS
The ‘butterfly’ in the butterfly valve is actually a disc which is connected to a turning rod. When the rod is rotated, the disc turns allowing or blocking the flow of liquid and gas.
Extended neck for easy operation, Cost effective, Fire friendly, Zero disc distraction, Sturdy liners, Low maintenance
Usually, industries that have machinery plant working under high pressure and temperature or steam, water and vacuum services prefer installing butterfly valves in their plant.
- Butterfly valves commonly finds applications in in circulation of water or for fire protection.
- They can be used for cooling water, air and gases.
- They are also used for waste water treatment, fire protection, gas supply and municipal water supply.
- They are used in chemical and oil industries in fuel handling systems, power generations, etc.
- Other industries that prefer using butterfly valves for the irplantare food processing, chemical and pharmaceutical services.
Mainly, there are 2 types of Butterfly Valves–Concentric (centric)& Eccentric.
The most basic type of butterfly valve design is a centric or concentric butterfly valve.
In this the stem passes through the centerline of the disc which is in the center of the pipe bore and the seat is the inside diameter periphery of the valve body.
There is zero-offset in such type of valves and is also called as resilient-seated because it relies on the flexibility of the seat rubber to have efficiently seal the flow when closed.
In this type of valve, the disc first comes into contact with the seat at around 85° during a 90° rotation.
Concentric butterfly valves are commonly used for low pressure range application.
In eccentric butterfly valves, the stem does not pass through the centerline of the disc, but instead behind it (opposite of flow direction) at an offset point.
When the stem is located right behind the centerline of the disc, the valve is called single-offset. This design reduces the disc contact with the seal before full closure of the valve thus improving service life of the valve.
Today, double offset and triple offset butterfly valves are also popular.
The Butterfly valve is used to operate or quick operations of valve, throttle the flow. They are featured by a fast operation and low-pressure drop. To make an open position from the closed, it requires only a quarter turn. Wafer, lug, Single-Flange, Flange are the regular types of butterfly valves.
Butterfly valves find use only in low pressure and low temperature flow systems. Lightweight and short face-to-face dimension, they can be used both for isolation and regulating the flow of material using their characteristic quarter turn rotating action.
The main difference between these butterfly valves are having face to face distance is 75% less then ball valve face to face dimensions.
Even wafer style valves require 2 gasket. … because this valve sandwich between 2 flanges.
A butterfly valve is from a family of valves called quarter-turn valves. In operation, the valve is fully open or closed when the disc is rotated a quarter turn. The “butterfly” is a metal disc mounted on a rod. When the valve is closed, the disc is turned so that it completely blocks off the passageway.
MFG STD.: API 609 CAT-A / BS EN 593 / ISO 13095
CLASS : #150 – #2500
TYPE : Center Design / Double Eccentric /
Triple Eccentric / Line Wafer Type
| END CONNECTION | SIZE |
|---|---|
| Flanged End | 1/2” – 24” |
| Butt Weld End | 1/2” – 24” |
| Threaded End | 1/4” – 4” |
| Socket Weld End | 1/4” – 4” |
