Butterfly Valve

Butterfly valves are a family of quarter-turn rotational motion valves that are used in pipelines to shut-off flow. It is often said that butterfly valves can be used to regulate the flow. However, we do not recommend doing this, as it can damage the valve disk and have a negative effect on the sealing properties. They are used in a wide variety of process media and industries especially in water supply, collection, and distribution, as well as pumping stations, and have a broad range of use cases especially in flow isolation. A couple of their key advantages over other valve families are their simple construction and compactness, resulting in the end products being of lighter weights and lower cost and with smaller installation footprints and faster actuation speeds.
The construction of a butterfly valve is relatively simple, with the rotation of the valve disc controlling the fluid flow. In the closed position, the disc blocks the valve bore while in the open position, the disc is oriented perpendicular to the flow direction to allow flow. Butterfly valves generally provide bi-directional flow and shutoff capability. However, they are not full-bore, which renders them unsuitable for pigging or swabbing. The body material is ductile iron / cast iron with an epoxy powder coat or liquid coat on both internal and external surfaces. The valves are typically operated by handwheels, gears, or actuators, or a combination thereof, according to the specific application requirement and technical specifications.
- Electrical Actuator Arrangement
- Indicator Arrangement
- Extension Shaft – Headstock Operation
Products

Eccentric Type Butterfly Valve
The most widely used double eccentric butterfly valve has its structural feature as the shaft center of the valve stem deviates from the center of the disc and the center of the body. The effect of double eccentricity enables the disc to break away from the valve seat immediately after the valve is opened, which greatly eliminates unnecessary excessive extrusion and scratching between the disc and the valve seat, reduces the opening resistance, reduces wear, and improves the performance of the Valve Seat life.
The scraping is greatly reduced, and at the same time, the double eccentric butterfly valve can also use a metal valve seat, which improves the application of the butterfly valve in the high temperature field. However, because its sealing principle is a positional sealing structure, that is, the sealing surface of the disc and the valve seat is in line contact, and the elastic deformation caused by the disc extrusion of the valve seat produces a sealing effect, so it requires high closing position and pressure bearing capacity.
- Electrical Actuator Arrangement
- Indicator Arrangement
- Extension Shaft – Headstock Operation
- Internally Lined or Internally Corrocoated
- Ductile Iron
- Cast Iron
- Stainless Steel
- Cast Carbon Steel
- M.S Fabricated

Concentric Type Butterfly Valve
The concentric butterfly valve is a flow control mechanism that uses a rotary disk to control the flow medium in the system. The disk remains in the passage, but since it is so thin, it gives very little resistance to the flow.
Butterfly valves have many benefits over other types of valves, such as economic construction, which consists of fewer components, making it easier to operate and maintain. The wafer design body and the relatively lightweight reduce its costs and installation costs, equipment, pipe support, labor and set – up time.
The most common type of butterfly valve arrangement is a centric or a concentric butterfly valve. This type of butterfly valve consists of the stem which travels along the middle line of the disk in the center of the pipe bore and the seat is inside diameter of the body of the valve. This no offset valve configuration is also known as a resilient-seated valve as it depends on the flexibility of the seat rubber when the flow is closed, for the reliability of the seal. In this type of valve, the disk first interacts with the seat at about 85° for a 90° rotation. Concentric butterfly valves are widely used in low-pressure applications.
- Ductile Iron
- Cast Iron
- Stainless Steel
- Cast Carbon Steel
- M.S Fabricated
- Wafer type ends ((50 MM to 1000 MM)
- Both flanged ends (50 MM to 1000 MM)
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