Butterfly Valve

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. When the valve is fully open, the disc is rotated a quarter turn so that it allows an almost unrestricted passage of the fluid. The valve may also be opened incrementally to throttle flow.

Category: Valves

Description

A butterfly valve is a quarter-turn valve that control flow of fluid in a pipe. It has a circular metal disc which is mounted on a turning shaft. When the valve is closed, the disc blocks fluid flow. When it is in the open position, the disc rotates to allow flow. Butterfly valves are popular for their simple designs, lightweight and affordable prices compare to other valve types.

Part Name	MateriaI name
VaIve Body	A351 CF8C	ZG0Cr18Ni10Ti	A351 CF8	A351 CF8M	A351 CF3	A351 CF3M
Cap	A351 CF8C	ZG0Cr18Ni10Ti	A351 CF8	A351 CF8M	A351 CF3	A351 CF3M
Sphere	A182 F347	A182 F321	A182 F304	A182 F316	A182 F304L	A182 F316L
Valve Seat	PTFE/STL	PTFE/STL	PTFE/STL	PTFE/STL	PTFE/STL	PTFE/STL
Stem	A182 F347 PTFE/304+	A182 F321 PTFE/304+	A182 F304 PTFE/304+	A182 F316 PTFE/304+	A182 F304L PTFE/304+	A182 F316L PTFE/304+
Gasket	Graphite	Graphite	Graphite	Graphite	Graphite	Graphite
BoIt	A193 B8	A193 B8	A193 B8	A193 B8M	A193 B8	A193 B8M
Nut	A194 8	A194 8	A194 8	96- A194 8M	A194 8	A194 8M
Proper Temperature	Soft seaI-196-250°C Hard seaI-196-425°C
AppIicabIe Medium	Nitric acid type weak corrosive medium

Types of Butterfly Valves

There are a variety of Butterfly valves, each having different types specifically fashioned for particular functions and industries. With these kinds in mind, you can now choose the right valve for your application.

Wafer Butterfly Valves

These are the commonest type that fits between two pipe flanges. It is put in place by pipe flanges and requires fewer bolts compared to other types of butterfly valves. This wafer type butterfly valve provides a dependable seal against bidirectional pressure, thus preventing backflow. Its compactness and ease of installation make it suitable for water supply and sewage treatment applications.

Lug Style Butterfly Valves

Lug-type valves have threaded inserts (lugs) on their bodies that allow them to be installed using bolts which connect directly to pipe flanges. This design allows for installation of the valve at the end of a pipeline or between two flanges. Lug butterfly valves are commonly used in fire-protection systems as well as in industrial applications where system isolation is required for maintenance or repairs.

Double Off Set Butterfly Valves

These ones are also known as high performance butterfly valves because they have two offsets from centerline of the disc and the body of the valve respectively. This design helps reduce friction and wear between disc and seat, resulting in a longer life span and better sealing performance. Double offset butterfly valves are better suited for higher pressure and temperature applications such as those found in power generation, chemical processing industry, oil and gas sectors etc.

Triple Offset Butterfly Valve

Triple offset butterfly valve has three offsets: two similar to double offset and an extra one that forms a conical sealing surface. This eliminates almost all contact between disc and seat hence little wear and no leakage occurs. Triple offset butterfly valves can best meet critical application calling for highest level reliability and performance examples being refining process, cryogenic services and power generation among others.

Additional information

Keywords	Butterfly Valve
Size	1” ~ 60” (DN25-DN1500)
Standard & Grade	A351 CF8C,A182 F347,WCB,,API 6D,API 598，JB/T9092，GB/T13927，GB/T26480,API 6A
Ends	BW RTJ RF ETC.
Delivery	Within 30 days and Depends on your order quantity
Payment	D/P , LC , OA , TT
Usage	In Chemical Industry, Coal, Oil Field Open Machine, Building Materials Heat-resistant Parts.

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Shipping & Delivery

Uses of packaging in the steel industry

Protective function

- Prevent steel products from physical damage, such as collision, scratching and extrusion, during transport, storage and handling to avoid affecting the quality and appearance of the products.

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- Specific description: the wooden box is made of thick wooden boards, and cushioning materials, such as foam, air cushion, etc., may be added inside to reduce the impact of vibration and collision on the product.

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- Specific description: anti-rust paper usually contains rust inhibitors, can be in contact with the metal surface to form a protective film, blocking the erosion of moisture and oxygen.

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- Specific description: plastic film has a certain degree of flexibility and sealing, can be tightly wrapped in the product surface, effectively isolate the external environment.

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- Specific description: The pallet is usually made of wood or plastic, the steel products are placed on the pallet, and then the forklift and other tools can be used for handling and loading and unloading.

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- Specific description: evenly cover the steel surface with anti-rust oil by brushing or soaking to form a durable protective layer.

Metal Corner Protection Packaging

- Purpose: To protect the corners and edges of steel products from damage during handling and transportation.

- Specific description: Metal corner guards are usually installed on the corners of products, using welding, bolting and other methods to increase the strength and impact resistance of the corners.

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