Longwan Donghai Butterfly Valve Factory specializes in producing hard seal butterfly valve, soft seal butterfly valve, flange butterfly valve and other products!
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Know butterfly valve manufacturer for more than 30 years
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After more than 30 years of continuous innovation and development, butterfly valve has been formed as the leading product, integrating professional research, development, production and sales
After more than 20 years of continuous innovation and development, the company has formed a butterfly valve as the leading product, integrating professional research, development, production and sales. Products with popular specifications include: flange butterfly valve, hard seal butterfly valve, soft seal butterfly valve, wafer butterfly valve, worm gear butterfly valve, rubber lined butterfly valve. The products are used in the fields of gold, chemical, petrochemical, power station, natural gas, building materials, water conservancy, industry, municipal environmental protection, etc. The product is reliable in quality and widely used. If you need to purchase, please call us.
Flanged butterfly valves are particularly suitable for large-diameter valves and are widely used in large-diameter regulating fields. The fully open flanged butterfly valve can reduce the flow resistance. When the opening angle of the butterfly plate is about 15-70 °, the flange butterfly valve can control the flow of medium very sensitively. Classification of flange butterfly valve: according to the material of sealing surface, butterfly valve can be divided into soft sealing flange butterfly valve and hard sealing flange butterfly valve. The butterfly valve seat uses embedded O-ring or fluororesin as gasket to form a seal. Therefore, in order to ensure the sealing performance of the butterfly valve, it has the function of self-correcting temperature difference and wear. Flange butterfly valve is mainly used in industrial production pipeline, and its function is to prevent medium flow in the pipeline or adjust the size of medium flow in the pipeline.
Hard seal butterfly valve is simple in structure, small in size, light in weight and only composed of several parts. The sealing ring of hard seal butterfly valve is made of stainless steel, which has two advantages of metal hard seal and elastic seal. It has excellent sealing performance, corrosion resistance and long service life, regardless of low temperature or high temperature. Hard seal butterfly valve is a kind of valve that can open and close the pipeline by rotating the circular butterfly plate (sealing part) according to the rotation of the valve shaft. It is mainly used as a stop valve, also as a stop valve and a throttle valve, and has a regulating function. Nowadays, hard-sealed butterfly valves are increasingly used in low-pressure, large-diameter and medium-diameter pipelines. The butterfly plate of the hard seal butterfly valve is installed on the radial direction of the pipeline. In the cylindrical channel of the butterfly valve body, the disc butterfly plate rotates around the axis and the rotation angle is 0 ° to 90 °. When the rotation reaches 90 °, the valve can be fully opened. Our hard seal butterfly valve is affordable and long-term supply. Welcome to leave a message or call in the lower right corner.
The mid-range butterfly valve using polytetrafluoroethylene or rubber as the sealing material is called the soft seal butterfly valve. According to the different connection methods, the soft seal butterfly valve can be divided into flange type soft seal butterfly valve, wafer type soft seal butterfly valve and welding type soft seal butterfly valve. It is not only cheaper than multi-level metal hard seal butterfly valve, but also has excellent sealing performance. Air pressure test or water pressure test can reach the zero leakage standard. This type of soft seal valve adopts the center line vertical plate structure. Both ends of the structure are symmetrical around the valve stem. There is no two-way seal structure that can distinguish the flow direction. It is also a two-way soft seal butterfly. Butterfly valve is applicable to two-way opening and closing and adjustment of ventilation and dust collection pipelines, water treatment, light industry, petroleum, chemical industry and other industries.
Three reasons for you to choose us
Donghai butterfly valve shows you the customized strength of
quality butterfly valve and is your trustworthy partner
More than 30 years of industry experience and reliable quality
The company has a variety of testing equipment and a group of experienced technicians. Relying on the company's technology, the company's various drop butterfly valves have been widely used in power, petrochemical, natural gas and other fieldsAll products have passed the inspection and certification of the authority
Focus on product design and R&D, product design diversity, reasonable price and timely delivery. The enterprise has obtained ISO9001:2000 quality system certification and TS certification of national special equipment manufacturing license (pressure pipeline components).
Careful material selection is not easy to damage
After receiving the steel from the supplier, Donghai butterfly valve will conduct various physical and mechanical tests. Metallurgical, hardness, tensile, ductility, compression, impact, wear, corrosion and other tests車間展示
Manufacturer environment of hard seal butterfly valve
Manufacturer environment of soft seal butterfly valve
Environment of flange butterfly valve manufacturer
Environment of wafer butterfly valve manufacturer
Worm gear butterfly valve production workshop
Rubber lined butterfly valve production workshop
Flange butterfly valve production workshop
Soft seal butterfly valve production workshop
about donghai
Concept: "Everything for user satisfaction"
Wenzhou Longwan Donghai Butterfly Valve Factory was founded in 1988. Its predecessor was Yongchang Donghai Butterfly Valve Factory. After more than 30 years of continuous innovation and development, it has formed a butterfly valve as the leading product, integrating professional research, development, production and sales. The main products include multi-level metal hard seal butterfly valve, soft seal butterfly valve, flange butterfly valve, ventilation butterfly valve, expansion butterfly valve, wafer butterfly valve, rubber lined butterfly valve, etc.
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The soft sealing butterfly valve refers to the metal material on both sides of the sealing pair and the elastic non-metallic material on the other side.
As a component used to cut off the pipeline system and control the flow, the soft seal butterfly valve has been widely used in many fields, such as petroleum, chemical, metallurgy, hydropower and so on.
The valve hydraulic device is installed on the valve driving shaft. The drive spline is fixed on the valve driving shaft with a key, and the crank (with external spline) is sleeved on the driving shaft.
The hard sealing butterfly valve with metal materials on both sides of the sealing pair and elastic non-metallic materials on the other side is called "soft sealing".
FAQ
Hard seal butterfly valve is a long-life and energy-saving butterfly valve. Its structure is designed according to the principle of three-dimensional braiding, and the valve seat adopts a multi-level structure compatible with hard and soft sealing, with exquisite processing and advanced technology.
What is the electric wafer type hard seal butterfly valve? The electric wafer type hard seal butterfly valve is one of the butterfly valves, which is connected in the form of wafer type butterfly valve.
Hard seal butterfly valve, also called flap valve, is a regulating valve with simple structure, and can also be used for switching control of low pressure pipeline medium. Hard seal butterfly valve is mainly used to cut off and throttle the pipeline.
The unique design of three-way eccentric makes no friction transmission between the sealing faces, which extends the service life of the valve.
Qualification certificate
Obtain license and certification to support non-standard valve customization
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