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Flange gate valve is a kind of gate valve. There are many categories of gate valve. For example, according to the connection mode, gate valve can be divided into flange gate valve, screw gate valve, welding gate valve and so on.

For these three kinds of gate valves, screw gate valves can only be used in small diameter and low-pressure pipes; welded gate valves are used in high temperature and high pressure conditions; both of them have some limitations in the scope of use. Only flange gate valve can meet the operating conditions of different caliber (DN50 and above) and different pressure (PN64kg and below).

Flange gate valve can be divided into cast iron gate valve, ductile iron gate valve, cast steel gate valve, stainless steel gate valve, forged steel gate valve and so on according to different materials. According to the structural form, it can be divided into rising stem gate valve and no-rising stem gate valve.

Principle of flange gate valve

The principle of flange gate valve is the same as that of gate valve. It can only be fully opened or fully closed, and cannot be used as a valve for regulating flow. Its working principle is that the gate moves up and down in a straight line along with the stem. The stem has trapezoidal thread. Through the nut at the top of the valve and the guide groove on the valve body, the up and down movement of the stem is realized, and the stem drives the gate movement. The movement direction of the ram is perpendicular to the direction of the pipeline fluid medium.

Flange gate valve is widely used in many fields, such as water supply and drainage, municipal construction, petroleum, chemical industry, environmental protection, etc. If you need to purchase flange gate valve, you can contact Bundor valve.

Application of flange butterfly valve and wafer butterfly valve

Flange butterfly valve and wafer butterfly valve belong to the same category of butterfly valve. They have many similarities. In some working conditions, except for the size limit, they can be used in general. However, due to the different connection forms, their application fields are different in some working conditions.

In the water supply and drainage system, because the medium passing through the pipe is water, so the temperature and pressure are not large. In this case, it is OK to use flange butterfly valve or wafer butterfly valve. For the material, we usually recommend the customer to use ductile iron.

If the medium passing through the pipe is corrosive medium, no matter flange butterfly valve or wafer butterfly valve, fluoroplastics should be used as sealing surface material.

For the high temperature environment, both flange butterfly valve and wafer butterfly valve need to use metal hard seal.

When the pressure is too high, it is recommended to use the flange butterfly valve. The flange butterfly valve has its own flange, which is connected with the pipeline and has stronger compression resistance than the clip butterfly valve.

No matter the wafer butterfly valve or flange butterfly valve is used, it must match its working condition and structural parameters, otherwise it can not be used even if it is bought back, and will causing a huge hidden danger.

If you encounter any problems in purchasing butterfly valves, please click the online customer service website of Bundor valve for consultation.

Media Contact
Company Name: Henan Bundor Flow Control Co., Ltd.
Contact Person: Li Lei
Email: Send Email
Phone: +86-379-63150781
State: Henan
Country: China
Website: http://www.bundorvalve.com