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The Use and Difference of Wafer Butterfly Valve

Ⅰ. What is the difference between the flange used in the wafer butterfly valve and the ordinary flange?

The difference between the wafer butterfly valve flange and the ordinary flange is the inner diameter. The inner diameter of the wafer butterfly valve flange is just in line with the inner diameter of the DN of the valve. There is a groove at the back, and this groove is to connect the The steel pipe is inserted inside, leaving one or two or more margins on both sides.

In addition to these, there is no difference between wafer butterfly valve flanges and ordinary flanges. Wafer butterfly valve flanges are also called butterfly flanges or wafer special flanges, which are special flanges on wafer butterfly valves. It matches the wafer butterfly valve.

Among the butterfly valves, there is also a flange butterfly valve, which has a flange on itself. The flange used in this butterfly valve can be an ordinary flat-welded product, and there is no need to choose a wafer butterfly valve flange.

The outer diameter, thickness, center distance and bolt holes of the wafer butterfly valve flange are all the same, and the bolts used in the butterfly flange are double-headed bolts, and the use of bolts corresponds to different operating temperatures. changed.

Ⅱ. Application of wafer butterfly valve

Used for gas pipelines in the sulfuric acid industry: inlet and outlet of furnace front blower, relay fan inlet and outlet, electric demisting series and Unicom valve, S02 main blower inlet and outlet, converter adjustment, preheater inlet and outlet, etc. to adjust and cut off gas volume.

Butterfly valve wafer type is used in sulfur burning, conversion, and dry suction sections of the sulfuric acid system. It is considered by the majority of users as a butterfly valve with good sealing performance, light operation, corrosion resistance, high temperature resistance, convenient and flexible operation, and safe and reliable use. It has been widely promoted and used. 

It is also widely used in SO2, steam, air, gas, ammonia, CO2 gas, oil, water, salt water, lye, sea water, nitric acid, hydrochloric acid, sulfuric acid, phosphoric acid, etc. in chemical, petrochemical, smelting, pharmaceutical, food and other industries It is used as a regulating and blocking device on the pipeline of the medium.

Ⅲ. Structural characteristics of wafer butterfly valve

1. The unique design of three-way eccentricity enables frictionless transmission between the sealing surfaces and prolongs the service life of the valve.

2. An elastic seal is produced by torque.

3. The ingenious wedge-shaped design enables the valve to have an automatic sealing function that becomes tighter and tighter, and the sealing surface of the wafer butterfly valve has compensation and zero leakage.

4. Small size, light weight, easy operation and easy installation.

5. Pneumatic, electric, hydraulic and manual devices can be configured according to user requirements to meet the needs of remote control and program control.

6. The material of replacement parts can be applied to various media, and the lining can be anti-corrosion (lining F46, GXPP, PO, etc.).

7. Diversified continuous structure: wafer, flange, butt welding.

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