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Butterfly Valves

Posted at: Offers to Sell and Export | Posted on: Fri 28 May, 2010 2:49 am |
 
butterfly valves
Products Photos CatalogButterfly Valves Photos Catalog



Butterfly valves

Feature


1. Design Standard: API 609

2. Face to Face: API 609

3. Flange Ends: ANSI

B16.5

4. Test and Inspection: API 598

Butterfly valves are valves with a circular body and a rotary motion disk closure member which is pivotally supported by its stem. A butterfly valve can appear in various styles, including eccentric and high-performance valves. These are normally a type of valve that uses a flat plate to control the flow of water. As well as this, butterfly valves are used on firefighting apparatus and typically are used on larger lines, such as front and rear suction ports and tank to pump lines. A butterfly valve is also a type of flow control device, used to make a fluid start or stop flowing through a section of pipe. The valve is similar in operation to a ball valve. Rotating the handle turns the plate either parallel or perpendicular to the flow of water, shutting off the flow. It is a very well known and well used design.

Wafer-style butterfly valves

The wafer style butterfly valve is designed to maintain a seal against bi-directional pressure differential to prevent backflow in systems designed for unidirectional flow. It accomplishes this with a tightly fitting seal, i.e., gasket, o-ring, precision machined, and a flat valve face on the upstream and downstream sides of the valve.

Lug-style butterfly valve

Lug-style valves have threaded inserts at both sides of the valve body. This allows them to be installed into a system using two sets of bolts and no nuts. The valve is installed between two flanges using a separate set of bolts for each flange. This setup permits either side of the piping system to be disconnected without disturbing the other side.

A lug-style butterfly valve used in dead end service generally has a reduced pressure rating. For example a lug-style butterfly valve mounted between two flanges has a 150 psi pressure rating. The same valve mounted with one flange, in dead end service, has a 75 psi rating.



Company Contact:

No member photo
Contact Name: Lincoln
Company Name: Shanghai Teyi Valve Manufacturing Co., Ltd.
Email: Email
Tel: 86-21-56357957
Fax: 86-21-56357967
Street Address: 188# Xingli Road,
Qingpu Industrial Park, Shanghai,
China 201711
Website: http://www.teyivalve.com
Member name: theonevalve
Country: China-CN China
Member Since: 19 April 2010
Total Leads: 11 theonevalve Import Export Business Leads
Business focus: Valves, Pipe Fittings, Pump
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