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.
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Api Flanged Ball Valve
Our company has been engaged in the stainless steel industry for decades and has nearly 15 years of Add to Inquiry -
Wcb Flanged Ball Valve
1. Precision casting valve body. 2. Anti-separation stem. 3. Full bore design. 4. Optional handle Add to Inquiry -
Stainless Steel Flanged Ball Valve
Design Standard: ASME B16.34. Fire Protection Design: API 607. Structure length standard: ANSI Add to Inquiry -
Ss Flanged Ball Valve
1. Basic design and manufacture according to B2002. 2. Inspection and tested according to JIS Add to Inquiry -
Din Flanged Ball Valve
1. Design standard: ASME B16.34. 2. Fire protection design: API 607. 3. Testing standard: API598. Add to Inquiry -
Stainless Steel Wafer Ball Valve
The unique design of eccentric makes the sealing surface between the frictionless transmission, Add to Inquiry -
Flange Ball Valve 10K
This style of Japanese standard ball valve is designed and manufactured according to Japanese Add to Inquiry
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Applicable Temperature: |
-20ºC ~ 150 ºC |
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Applicable Medium: |
Water / Oil / Gas / Causticity Medium |
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Pressure Rating: |
PN16/PN25/150LB |
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Size Range: |
1/2" ~ 8"(DN15-DN200) |
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Type: |
Ball Valve |
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Connection: |
Female,Male |
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Structure: |
BALL |
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Standard: |
ANSI BS DIN JIS |
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Brand Name: |
Zhongtou/ZT (We also accept OEM) |
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Price: |
According to quantity |
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Original: |
Zhe Jiang, China |
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Payment term: |
TT, LC |
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Delivery date: |
According to the order quantity, In stock within seven days, out of stock takes 30 days |
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Warranty: |
1 year |
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Sales Terms: |
FOB TO NINGBO O SHANGHAI |
Types of Flanged Ball Valve
The flanged ball valves produced by our company mainly include the following types:
Api Flanged Ball Valve
API flanged ball valve is a ball valve designed and manufactured according to the standards set by the American Petroleum Institute (API), specifically with flanged end connections, meaning it attaches to pipes using flanges, and is typically used in oil and gas pipelines due to its ability to handle high pressure and temperature conditions while providing a tight seal for flow control.
Wcb Flanged Ball Valve
WCB flanged ball valve refers to a ball valve where the body is made from "WCB" material (Weldable Cast Steel, Grade B) and has flanged connections on either end, meaning it is designed to be attached to a pipe system using flanges instead of threads.
Stainless Steel Flanged Ball Valve
A stainless steel flanged ball valve is a valve that controls the flow of fluids using a floating ball and flanged ends. The valve can be manually operated with a handle or automatically operated with a motor.
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ITEM |
PART |
MATERIAL |
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1 |
Body |
CF8M |
CF8 |
WCB |
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2 |
Ball Seat |
PTFE/RPTFE/PPL |
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3 |
Ball |
316 |
304 |
201 |
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4 |
Body Gasket |
PTFE |
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5 |
Cap |
CF8M |
CF8 |
WCB |
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6 |
Stem |
316 |
304 |
201 |
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7 |
Thrust Washer |
PTFE |
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8 |
Stem Packing |
PTFE |
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9 |
Gland Nut |
304 |
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10 |
Handle |
201 |
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11 |
Spring Washer |
304 |
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12 |
Nut |
304 |
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13 |
Locking Device |
201 |
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14 |
Handle Cover |
Plastic |
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● The front and rear pipes should be coaxial. The sealing tops of the two flanges should be parallel. The pipeline should be able to bear the weight of the valve. If it is impossible, the channel must be equipped with proper support.
● To remove oil, welding slag, and all other impurities present in the pipeline, we should run an expulsion procedure of the channels.
● The flange ball valve should be fully intact. For this, we can check the sign of the flange ball valve and make sure. We should also make sure that the valve is working correctly. We can check it by opening and closing the valve several times.
● Eliminate the protective parts of the flange ball valve at both ends of the connecting flanges.
● Check the valve hole to eliminate and clean any possible filth. Even small foreign particles between the valve seat and the ball may harm the sealing surface of the valve seat.

Storage Precautions for Flange Ball Valves
The valves must be kept in a safe environment. Dust and humidity may damage the valves. The area should be well-ventilated.
Before putting the valve in, you must make sure that the end protectors are in place. If not, dry pollutants like dust, sand, and grit can scratch the metal surfaces and parts of the seats, which can cause leaks when the car is being serviced.
One should keep the valve at a temperature more significant than the dew point temperature at the storage location. It will help to prevent the increase of water droplets on the valve sheet.
It is against the law to leave the valve on the floor. We can put the valve on a wooden pallet so that it is just above the floor. We must always take care not to damage any parts of the adaptor, gear unit, or actuator that protrude during storage.
Non-compatible grease or any other material inside the valve is prohibited. It may malfunction the valve.
A nontoxic coating of “Manganese Phosphate” was used for the steel valves. It slows down the creation of rust during storage. With their natural finish, you can use stainless steel valves also.
Customizable Options for Flanged Ball Valves
Material Selection
Size and Diameter
Pressure Rating
End Connections
Actuation Method
Flow Direction
Seal Type
Body Design
Packaging and Shipping
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Packaging |
Export standard Carton or wooden case |
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Shipping |
We will help you to choose the best shipping way according to your detail requirements. By sea, by air, or by express, etc. |

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.

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