Butt welding butterfly valve

The wafer butterfly valve has simple structure, small volume, light weight, only by a few parts. And only need to rotate 90 ° can rapid opening and closing, simple operation, at the same time, the valve has good flow control characteristics. Butterfly valve in the fully open position, the butterfly plate thickness is medium flows through the body when the only resistance, thus produced by the valve pressure drop is small, it has good flow control characteristics. Butterfly valves have a seal and metal seal two kinds of seal type. Elastic sealing valve, sealing ring can be embedded in the body or attached to the butterfly plate peripheral.

Introduction of butt welding butterfly valve butterfly plate installed on the diameter of the pipe direction. Cylindrical channels in butterfly valve body, disc disc around the axis of rotation, rotation Angle for 0 ° and 90 °, and between the rotation to 90 °, the valve is fully open.

Using metal seal valve generally live longer than elastic sealing valve, but it is hard to be completely sealed. Metal sealing can adapt high working temperature, elastic seal has the defect of being limited by the temperature.

If required butterfly valve used as flow control, mainly is the right choice of the size and type of valve. The structure and principles of butterfly valve is especially suitable for production of large diameter valves. Butterfly valve not only in the oil, gas, chemical industry, water treatment and other general industrial used widely, but also applied to the cooling water system of thermal power plants.

Commonly used butterfly valve has two kinds of butterfly valve and flanged butterfly valve to the clamp. Wafer butterfly valve with stud connection in place between two pipe flanges and flanged butterfly valve is a valve with flange, bolts on the valve flange connection on the pipe flange on both ends.

2 butt welding butterfly valve and gate valve performance comparison

Nominal pressure, nominal diameter of the same general butterfly valve and gate valve which rigor is better, not easy to leak?

Of than in sealing butterfly valve gate valve is better, but there is also a manufacturer of butterfly valves sealed performance is good.

The gate size is big, take up the space is large.

Butterfly valve is small in size, small footprint.

Specific use, consider medium temperature, the valve sealing and packing.

Rules of nominal diameter greater than 50 with butterfly valves.

Butt welding butterfly valve is a national key new products, high-performance manual butterfly valve USES a double eccentric and a special oblique elliptic cone sealing structure. Solve the traditional eccentric butterfly valve in the opening and closing 0 ° ~ 10 ° seal face is still in the sliding contact friction moment of ills, realize the butterfly plate in open the instant sealing surface, the separation, close contact with the sealing effect, achieve prolong service life, sealed performance is the best.

Three purposes

Used in sulphuric acid industry gas pipeline: furnace blower before entrance, relay fan entrances and exits, valve series electric mist and unicom, S02 main blower entrances, converter, using gas preheater gateway such as adjusting and globe.

Used in the sulphuric acid systems in burning sulfur, transformation, dry absorption section, is the first selection of sulphuric acid plant with the brand, is considered by the masses of users is: good seal performance, operation light, corrosion, high temperature resistant, convenient operation, flexible, safe and reliable use of butterfly valve, received a large number of promotion of use.

Also widely used in: chemical, petrochemical, metallurgy, medicine, food and other industries of SO2, steam, air, gas, ammonia, CO2 gas, oil, water, salt water, alkali liquor, sea water, nitric acid, hydrochloric acid, sulfuric acid, phosphoric acid and other media on the pipeline as the adjusting and intercepting device is used.

4 structure characteristics

(1) three unique to the eccentricity of the design between the sealing surface friction drive, prolong the service life of the valve.

(2) generated by the torque of the elastic seal.

(3) clever wedge design allows for automatic sealing valve has closed more and more tightly, compensatory, zero leakage between the sealing surface.

(4) small volume, light weight, light operation and ease of installation.

(5) according to user requirements with pneumatic, electric devices, meet the needs of the remote control and programmed control.

(6) replacement parts material can be applied to all kinds of medium, and can be carried out lining anticorrosive (lining F46, GXPP, PO, etc.).

(7) All landowners continuous structure diversification: the clamp, flange, butt welding.