Double flange butterfly valve used for regulation and flow sectioning in water supply facilities, plumbing, irrigation, etc. It has low head loss due to a hydrodynamic design of the disc, it is 100% water tight and need no gaskets to be installed.
What are the two body styles of butterfly valves?
Butterfly valves are popular because of their low-profile designs. They are thin, usually taking up much less space in a pipeline than ball valves. The difference in the two main variations of butterfly valves is how they attach to the pipeline. These body styles are lug and wafer style.Jan 12, 2018
What are the disadvantages of butterfly valves?
- A certain part of the disc always faces the flow, even when completely opened. ...
- It has a poor sealing function.
- Throttling by employing butterfly valves is restricted to low-pressure drop systems.
What is wafer butterfly valve?
Wafer-Style Butterfly Valve Most wafer-style butterfly valves are engineered with four holes that align with the connected pipeline. The valve is designed to clamp between two flanges in your pipe work. ... Unlike lug-style butterfly valves, wafer-style butterfly valves cannot be used as pipe ends or end-of-line service.Jun 25, 2020
What is double eccentric butterfly valve?
High Performance valves, also known as double eccentric butterfly valves have a stem which is mounted slightly out of the pipeline center and also behind the disc seat. This design leads to minimal wear and low operating torques.
Does it matter which way you install a butterfly valve?
The butterfly valves are bi-directional but do have a preferred flow direction. It's however strongly recommended to install the valves in the preferred flow direction, as it will extend the valve's life span and will also lower the operating torque.Oct 25, 2017
Is Double offset butterfly valve bidirectional?
The valves are bi-directional even though valves from DN700 and up are marked with an arrow indicating the preferred flow direction.
What is a flanged butterfly valve?
A butterfly valve is a quarter-turn rotational motion device that utilizes a rotary disc to allow, obstruct, or control the flow of fluids in a piping system. ... They have a fairly simple construction and operation mechanism, and they have a compact size designed to fit two pipe flanges.
What is a butterfly flange?
Flange butterfly valve is to connect the flange on both ends of the valve to the pipe flange with bolts. Butterfly valve, as a component used to realize on-off and flow control of pipeline system, has been widely used in many fields, such as petroleum, chemical industry, metallurgy, hydropower, etc.Nov 4, 2019
What is butterfly valve good for?
A butterfly valve regulates flow by starting, slowing, or stopping media. The disk opens and closes with a low-torque rotation of 90 degrees and works for any compatible application. Because they cost less and are lighter weight, the butterfly valve is often preferred over other types of valves.Apr 1, 2021