China Butterfly Valve Manufacturers, Suppliers and Factory - Customized Butterfly Valve

Your Professional Butterfly Valve Supplier

Quanzhou Keliang Valve Co., Ltd. was established in 2000. After more than twenty years of development, the company has achieved a significant leap from small-scale production to modern automated manufacturing. Today, Keliang operates a large production base equipped with advanced production lines and testing systems. We are capable of manufacturing a wide range of high-quality valve products, including gate valves, foot valves, check valves, butterfly valves, and filters/strainers. The company is a supplier to numerous foreign trade companies and well-known valve brands.

Grooved Butterfly Valve
Grooved Butterfly Valve is the top pick for plumbers and contractors who need to save time and money. Made from super strong ductile iron, this valve is built to last. Its grooved ends make installation a breeze—just fit the coupling and
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Butterfly Valve Wafer Type Gear Operated
Butterfly Valve Wafer Type Gear Operated with gear operators maximize space efficiency. The durable construction withstands demanding conditions. Perfect for retrofit projects and new installations alike. Trusted by engineers for fire
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Butterfly Valve 4 Inch
Wafer Gear Operated Butterfly Valve 4Iinch with gear drives handle the toughest industrial applications. The enclosed gearbox provides mechanical advantage for easy operation. Compact design saves space in crowded pipe racks. Ideal for
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Fire Protection Butterfly Valves
Fire Protection Butterfly Valves combine easy-grooved connections with a torque-boosting gearbox. They enable quick installation and effortless operation of large-diameter valves in high-pressure systems. Built with durable ductile iron
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Ductile Iron Butterfly Valve
Ductile Iron Butterfly Valve provide exceptional flow control in demanding environments. The gear operator enables easy handling of large diameters. Quick-connect ends save installation time and costs. Ideal for fire sprinkler systems,
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Gear Operated Butterfly Valve
Gear Operated Butterfly Valve deliver powerful torque for large pipelines. Their precision gearing ensures smooth operation under high pressure. The grooved connections allow quick installation with standard couplings. Perfect for water
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8 Inch Butterfly Valve
Precision 8 Inch Butterfly Valve optimize performance in water treatment and power generation. The efficient gearing reduces operating torque, while standardized flanges simplify installation. With full epoxy coating and stainless steel
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Flange Butterfly Valve
Flange Butterfly Valve deliver reliable performance in municipal water systems and power plants. Their precision gearing ensures smooth operation under high pressure, while the robust flange connections provide excellent structural
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Butterfly Valve Wafer Type
Butterfly Valve Wafer Type offers a compact, cost-effective solution for on/off flow control. Its space-saving design installs easily between flanges, and the simple quarter-turn handle allows for quick, visual operation. Built with
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High Performance Wafer Butterfly Valve
High Performance Wafer Butterfly Valve solves two key challenges: space constraints and budget. Its slim profile fits seamlessly into dense piping networks, and the straightforward installation between flanges cuts down on both time and
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Grooved End Butterfly Valve
Grooved End Butterfly Valve with handle offers quick, tool-free installation using housing clamps for a secure, leak-proof connection. Ideal for fire protection, water supply, and industrial piping systems, it ensures reliable on/off
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Why Choose Us

Certifications
As an ISO 9001–certified original equipment manufacturer (OEM), we provide OEM and private label manufacturing services for many well-known large valve manufacturers both domestically and internationally.

Sales Market
The company has gradually expanded into the production of fire hydrants and has successfully entered the international market. Our products are exported to Southeast Asia, South America, the Middle East, Africa, and other countries and regions, earning the trust and recognition of customers worldwide.

Customization Available
Stainless steel valve stems, bolts, and nuts are available as optional components, depending on your target price and brand positioning.

Butterfly Valve

A butterfly valve is a device that allows you to achieve better flow control. The design uses a metallic disc that rotates a quarter-turn at a time around a fixed-stem axis. The 90-degree turns provide quick-action control between open and closed positions. In addition, the disc is generally sized equally to the internal diameter of the adjoining pipe to give full-color capability.

Product Parameter

Product Name	Butterfly Valve 4 Inch
End Connection	Wafer
Pressure Max	363 PSI /25 Bar
Standard	ANSI / GB/BS
Size Range	2'' to 12'' (DN50 to DN300)
Color	Red/Blue
Surface Finishing	Epoxy Paint Coating
Application Medium	Water
Application fields	Fire protection system, Water supply project

Product Material

Body	Ductile Iron QT450-10
Handwheel	Ductile Iron QT450-10
Disc	Ductile Iron ,covered by EPDM / 304 Stainless Steel
Stem	2CR13 Stainless Steel/304 Stainless Steel
Spring	304 Stainless Steel
Seal	NBR(Standard)

Butterfly Valve Wafer Type Gear Operated

Benefits of Butterfly Valve

Compact design: Butterfly valves are compact and lightweight, making them ideal for applications where space is limited. This is particularly beneficial in large piping systems where weight and space are critical factors.

Cost-effectiveness: Butterfly valves are generally more cost-effective than other valve types, especially in larger sizes. Their simpler design and fewer components contribute to lower manufacturing and maintenance costs.

Quick operation: Like ball valves, butterfly valves are quarter-turn valves that allow rapid opening and closing. This makes them suitable for applications requiring quick shut-off or frequent operation.

Flow control: The angle of the disc controls the flow rate through the valve.

Wide range of sizes: Butterfly valves are available in a wide range of sizes, suitable for both small—and large-scale applications.

Butterfly Valve Standard Features

Rugged epoxy coated ductile iron body with stainless steel disc for maximum corrosion resistance

Unique wave line seat and special disc shape reduces the torque required to turn the valve and extends the seal life

Lower torque also reduces the size of the actuator, lowering the cost of the valve assembly

Two piece shaft design enhances the flow capacity of the valve

Valves direct mount to actuator with standard ISO5211 international standards

Butterfly Valve components

The butterfly valve consists of only four main components: body, disk, stem and seat.

Butterfly valve body

Butterfly valves generally have bodies that fit between two pipe flanges, the most common being lug and wafer body design.

Butterfly valve disk

The disk is how the valve stops flow – it is equivalent to a plug in a plug valve, a gate in a gate valve or a ball in a ball valve. There are variations in disk design and orientation in order to improve flow, sealing and/or operating torque.

Butterfly valve Stem

The stem of the butterfly valve may be a one-piece shaft or a two-piece (split-stem) design. The stem in most resilient seated designs is protected from the media, thus allowing an efficient selection of material with respect to cost and mechanical properties.

Butterfly valve Seat

The seat of a resilient-seat butterfly valve utilises an interference fit between the disk edge and the seat to provide shutoff. The material of the seat can be made from many different elastomers or polymers. The seat may be bonded to the body or it may be pressed or locked in.

Detailed Operation

Disc Rotation

The core component of the butterfly valve is the disc, which rotates to control the flow.

Closed Position

When the disc is perpendicular to the direction of flow, it completely blocks the passage, stopping any fluid from passing through.

Open Position

Rotating the disc 90 degrees aligns it with the flow direction, allowing fluid to pass through the valve.

Butterfly Valve: Working Principle

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 with an epoxy powder 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.

FAQ

Q: What is a butterfly valve used for?

A: Butterfly valves are used for on-off or modulated fluid control in various industrial applications.

Q: Can you use a butterfly valve for gas?

A: Yes, butterfly valves can be used for liquids and gasses, but not bulk solids.

Q: What is the advantage of a butterfly valve?

A: Butterfly valves are lightweight, especially at large sizes, and can be used for both on-off and modulated fluid control.

Q: Can a butterfly valve be used for flow control?

A: Yes. There is a relationship between the angle of the disc and flow rate. It is not a linear relationship but the manufacturer's datasheets should offer guidance on the relationship.

Q: Can a butterfly valve be installed upside down?

A: Technically a butterfly valve can be installed upside down. However, this is not recommended because it can negatively impact the seals and increase turbulence through the valve.

Q: Do butterfly valves have a flow direction?

A: Yes. Butterfly valves have a flow direction. There may be an arrow stamped on the valve's body to indicate the direction.

Q: Do butterfly valves need gaskets?

A: Many butterfly valves have resilient seats built in and do not require gaskets. However, butterfly valves with metal seats will require gaskets.

We're known as one of the most reliable butterfly valve manufacturers and suppliers in China. With a professional production team, we are able to meet the needs of the majority of our customers. Please feel free to buy customized butterfly valve made in China here from our factory.

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