electric wafer butterfly valve Archives

The electric wafer butterfly valve belongs to a variety of electric control valves. Its connection methods are mainly: flange type and wafer type. Its sealing forms mainly include: soft seal and metal hard seal. The electric wafer butterfly valve controls the switching operation of the butterfly valve through the power signal, and can be used as the shut-off valve, control valve and check valve of the pipeline system. With manual control device, once there is a power failure, it can be temporarily operated manually without affecting the use. Now the electric wafer butterfly

Types of wafer butterfly valves

valve has been continuously improved and upgraded, and the new electric wafer butterfly valve can be better used in working conditions.

The structural characteristics of a new type of electric wafer butterfly valve
1. It can still have stable sealing performance under high temperature and high pressure conditions. With a special sealing system to ensure high sealing performance in various temperature ranges from ultra-low temperature to ultra-high temperature
2. The eccentric electric wafer butterfly valve makes the valve opening resistance small. The sealing surface of the butterfly plate is an upwardly convex cone. When opening, all points on the circumferential surface of the butterfly plate are separated from the sealing ring at the same time, and solid objects are not easy to accumulate on the sealing surface. The valve closing process is completed by the elastic pressure of the sealing ring.
3. There is no interlocking phenomenon between the electric butterfly plate and the sealing ring. The sealing performance of the valve is not affected by temperature changes.
4. The butterfly valve stem is sealed with graphite pressed into a sealing ring to ensure zero leakage.

triple eccentric butterfly valve-wafer-lug-double flange-welded (5)

Features of the new electric wafer butterfly valve:
1. It adopts double eccentric structure, with tighter and tighter sealing function, and reliable sealing performance.
2. The sealing material is made of stainless steel and nitrile oil-resistant rubber pairing, which has a long service life.
3. The rubber sealing ring can be located on the valve body or on the butterfly plate, which can be applied to different characteristics of media for users to choose.
4. The butterfly plate adopts a frame structure with high strength, large flow area and small flow resistance.
5. In order to effectively prevent corrosion, the overall paint will be applied to facilitate the replacement of valve seat sealing materials for use in different media.
6. This valve has a two-way sealing function. It is not controlled by the flow direction of the medium during installation and is not affected by the spatial position. It can be installed in any direction.
7. It has the advantages of small size, light weight, reliable performance, simple matching, and large flow capacity, which is especially suitable for clean liquids and gases.

In the fierce market competition, manufacturers of electric wafer butterfly valves must adhere to the policy of developing enterprises through science and technology, continuously optimize product structure, and implement quality improvements. Increase the introduction of technology and form its own product characteristics. Providing high-quality products and satisfactory service is the tenet of Tanghai. We warmly welcome customers to inquire and patronize!

TH Valve is a professional manufacturer of butterfly valve, gate valve, check valve, globe valve, knife gate valve, ball valve with API, JIS, DIN standard, used in Oil, Gas, Marine industry, Water supply and drainage, fire fighting, shipbuilding, water treatment and other systems, with Nominal Diameter of DN50 to DN1200, NBR/EPDM/VITON, Certificates & Approvals: DNV-GL, Lloyds, DNV, BV, API, ABS, CCS. Standards: EN 593, API609, API6D

Video of center-lined butterfly valve: https://youtu.be/NuSZH_AJcwY
Video of double eccentric butterfly valve: https://youtu.be/yOw2xp3bIaE
Video of triple eccentric butterfly valve: https://youtu.be/AkRwg2X1Wh0
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The difference and selection of electric wafer butterfly valve and electric flange butterfly valve
As one of the most common valves in pipelines, electric butterfly valves are used to realize the on-off and flow control of various media in the pipeline system. They have been widely used in many fields such as petroleum, chemical industry, metallurgy, and hydropower. application. Then in the commonly used electric butterfly valve, it can be

D673H-16C-stainless steel pneumatic triple eccentric butterfly valve

divided into two kinds, electric wafer butterfly valve and electric flange butterfly valve, and these two kinds of valves have their own characteristics, and they are not the same in performance. They can be used in Different industries.

For these two kinds of valves, in addition to the different structural forms, if they are under the same parameters, the biggest difference is that the connection method is different, that is, the installation form is different, which depends on the site working conditions!

The difference between electric wafer butterfly valve and electric flange butterfly valve:
The thickness of the electric wafer butterfly valve is relatively thin compared to the flanged butterfly valve. There are no flanges at both ends of the valve body, but only a few guide bolt holes. The valve uses a set of bolts/nuts to connect with the flange of the pipe end, which is generally applicable. It is used in places where the space is relatively narrow or the pipeline is restricted. The advantage is that it is more convenient to disassemble, the valve cost is lower, and the space is small, but the disadvantage is that one sealing surface has a problem, and both sealing surfaces have to be disassembled!
Electric flange butterfly valve has flanges at both ends of the valve body, which are connected with pipeline flanges. Compared with wafer butterfly valves, the sealing performance is more reliable. It is generally used in places with larger diameters or higher pressures, but the cost is relatively good.

D943H-16C-metal seated stainless steel electric triple offset butterfly valve

Choice between the two:
However, there are still some things to pay attention to in the design. For example, wafer type valve bolts are generally relatively long. Under high temperature conditions, the expansion of the bolts may cause leakage, so it is not suitable for large pipe diameters under high temperature conditions. . Another example is the wafer butterfly valve generally cannot be used in the end of the pipeline and downstream needs to be disassembled, because when the downstream flange is removed, the wafer valve will fall off, in this case, it must be shortened separately. The flange type butterfly valve does not have the above problems, but the cost will be higher.
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