Butterfly Valve

Your Professional Butterfly Valve Supplier

WENZHOU ZHONGTOU VALVE/ZT VALVE is a leading valve manufacturer specializing in the production of various types of butterfly valves. Our products are extensively utilized in fluid systems across industries such as oil and gas, chemical, petrochemical, power generation, shipbuilding, and machinery.

Rich Experience

Our founders possess over three decades of experience in the stainless steel industry and have been exporting stainless steel products for more than 15 years.

Quality Control

We implement a scientific informatization management system and rigorous quality control processes. CAD and CAPP systems are employed for design and innovation, while PDM and ERP systems support our information management infrastructure.

Professional Team

We boast a highly skilled technical team, including five engineers with an average of over ten years of experience. This expertise enables efficient production arrangements and rapid business growth.

Sales Market

Our products are exported to over 30 countries, including European nations like Spain and the United Kingdom, North American markets such as the United States, Middle Eastern countries like Iran, and Southeast Asian countries such as Vietnam, Malaysia, and Singapore.

Parameter

Customized support	OEM
Place of Origin	China
Application	General
Power	Manual
Port Size	DN50-DN1200
Structure	BUTTERFLY
Design confirms	API 609, BS EN 593, MSS SP-67, BS5155
Tightness check	API 598, ISO 5208, EN12266-1, DIN3230, BS5155
Face-to-face conform	API 609, ISO 5752, BS EN 558, BS 5155, MS SP-67, DIN3202
Suitable medium	Petroleum, chemical industry, water, oil, gas etc.
Working temperature	-45 to 200 Celsius
Body/Disc:Cast Iron(CI)	GG25,Ductile Iron(DI):GGG50
Bushing	PTFE, Nylon, Lubricated Bronze
Certification	ISO CE
Price	Varies according to raw material and exchange rate changes
Warranty	We are responsible for replacing items with problems that are caused by our company.

Types of Butterfly Valve

The butterfly valves produced by our company mainly include the following types:

Stainless Steel Lug Butterfly Valve

Our product is a valve used to regulate the flow of liquid or gas in different types of pipelines. Second, a valve consists of a disc or plate mounted on a shaft that rotates to control the flow of fluid. The valve disc is located in the center of the pipe and is tightly sealed with the valve seat to prevent leakage and ensure tight closing.

Stainless Steel Wafer Butterfly Valve

The Stainless Steel Wafer Butterfly Valve is an essential part of various industries due to its superior performance and reliability. It is widely used to control the flow of fluids, gases and slurries in pipelines. A key performance characteristic of this valve is its durability. It is made of high-quality stainless steel material, which has excellent resistance to corrosion, oxidation and erosion.

Precautions For Butterfly Valve Installation

Weld the flange to the pipe and cool to ambient temperature before mounting the valve to the flange. Otherwise, the high temperature generated by welding will affect the performance of the soft seat.

Edges of welded flanges must be lathed to smooth surface to avoid damage of soft seat during valve installation.The flange surface must be completely free from damage and deformation, remove all dirt, dust and foreign matter, and avoid liquid leakage of valve and flange interface.

Clean the flange and the inner cavity of the pipeline to completely remove the sputter, scale and other foreign bodies left by welding.

When installing piping between valves, accurate alignment of the center of the upper and lower water lines is essential for trouble-free operation.The imprecise center point shown in Figure 1 must be avoided.

When installing the valve, fix the positioning bolts at the bottom of the pipe at the same height to play a supporting role, and adjust the distance between the flanges until the two sides of the valve body are about 6-10 mm apart.Remember that the valve can only be opened from the closed position to the 10° position.

Insert the two bolts into the lower guide bar of the valve and install carefully so that the flange surface does not damage the soft seat.

Then insert the other two bolts into the guide rod above the valve, ensuring accurate center position between pipe and valve.

Open valve three times to check whether the contact between valve plate and flange is not smooth.

Remove the positioning bolts and place all bolts around the body in alternating diagonal tightening (see Figs. 3 and 4) until the flange touches the body.

Provide a support for valve when install actuator to avoid twist of valve neck and reduce friction between valve and pipe.

Do not step on the valve neck or valve handwheel.

Do not install DN350 or larger valves upside down.

Do not install butterfly valves directly on check valves or pumps as this may cause damage upon contact with the valve plate.

Do not install valves on the downstream side of elbows and tapering tubing, or calibrate valves when flow rates change.In this case,it is recommended to install the valve at a distance of approximately 10 times the nominal diameter of the valve.

Valve installation needs to take into account which disc will experience flow rate and pressure during the transfer of liquid.

Safety Precautions for the Use of Butterfly Valves

Lockout/Tagout Procedures

Whenever maintenance or repairs are being conducted on butterfly valves, it is essential to adhere to proper lockout/tagout procedures. This involves isolating the valve from power sources and clearly labeling it to prevent accidental activation, which could lead to injuries or equipment damage.

Personal Protective Equipment (PPE)

Whenever working with butterfly valves, proper PPE, such as safety gloves, goggles, and appropriate clothing, should be worn. This will protect operators from potential hazards associated with valve maintenance, including contact with harmful fluids, sharp edges, or flying debris.

Training and Certification

Operators and maintenance personnel should be adequately trained in the safe handling, operation, and maintenance of butterfly valves.

Customizable Options for Butterfly Valves

● Body Material

● Disc Material

● Seal Material (Seat)

● Connection Type

● Actuator Type

● Size

● Pressure Rating

● Temperature Rating

● Stem Design

Packaging and Shipping

Packaging

Export standard

Carton or wooden case

Shipping

We will help you to choose the best shipping way according to your detail requirements. By sea, by air, or by express, etc.

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Our Services

1. Pre-sale service

ZHONGTOU VALVE has a technical team with rich experiences in fluid control system, and we own industry-leading installation and inspection equipments. From drawing to installation, ZHONGTOU VALVE will provide you with the most professional services, technical assistance and quality assurance, to optimize your system operation in the best state.

2. Sale of services

● Fast delivery

We are a factory with a large inventory of stock, which guarantees that the goods will be shipped within the fastest day from the date of signing the contract.

● Quality Inspection

Our products are manufactured in strict accordance with national and international standards, and we test each product before delivery. If you would like to view our quality certification and various test reports, please ask us.

● Project Tracking

ZHONGTOU VALVE will establish a dedicated project team for every solution order, in order to provide a better aftermarket service.

3. After-sales service

According to the contract to provide product certification, production license, inspection reports, installation instructions.

In the correct installation and use of the product quality problems, the company will be responsible for in the end.

Our Factory

WENZHOU ZHONGTOU VALVE/ZT VALVE is located in Wenzhou City, Zhejiang Province, a place with a very developed stainless steel industry. There is a well-established and mature supply chain here. We mainly export to over 30 countries in North America, South America, Europe, Asia and other states. With persistence and effort, we have become one of the leading enterprises of valves fittings and flanges in China.

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FAQ

Q: What is the main advantage of a butterfly valve?

A: Compact Design: Requires less space, simple mechanism, and lighter weight compared to other valve types. Quick Operation: Offers rapid on/off functionality, enhancing process efficiency. Minimal Maintenance: Simple construction reduces maintenance needs and costs.

Q: What is the difference between a pinch valve and a butterfly valve?

A: Air actuated pinch valves have a simpler design and are better able to handle abrasive materials without clogging or damaging the valve components. Butterfly valves can also typically handle abrasive materials but may require more frequent maintenance to ensure that they remain in good working condition.

Q: What can go wrong with a butterfly valve?

A: The most common failure of a high performance butterfly valve is the rubber elastomer inside the butterfly valve. It can tear, wear, wear or perforate and even fall off after continuous use. The conventional thermal vulcanization procedure is not able to meet the repairs on-site.

Q: Do butterfly valves need lubrication?

A: Lubrication and cleaning are essential to maintain the efficient operation of lug butterfly valves. Lubrication can prevent friction and wear on the valve components by ensuring that there is less contact between the components.

Q: How do you tell if a butterfly valve is open or closed?

A: When the handle is parallel to the valve, it is closed, and when it is perpendicular to the valve, it is open. Butterfly valves are suited for use in garden irrigation, and they are also commonly used in space-restrictive applications. They have a slender design that makes them ideal for tight-fitting spaces.

Q: How do you inspect a butterfly valve?

A: After ensuring there is no leakage at the stuffing and other sealed parts, close the butterfly plate. Open the other end, if there is no leakage at the butterfly plate's sealing, it is considered qualified. The butterfly valve that is used for flow regulation can skip the sealing performance test.

As one of the leading butterfly valve manufacturers and suppliers in China, we warmly welcome you to buy discount butterfly valve from our factory. All our products are with high quality and competitive price. Contact us for quotation.

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