Butterfly valve structure, working principle and application of environmental analysis

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Butterfly butterfly valve installed in the pipe diameter direction. In the butterfly valve body cylindrical channel, the disc-shaped disc rotates about the axis, the rotation angle is between 0 ° ~ 90 °, when rotated to 90 °, the valve is fully open state card. Butterfly valve structure is simple, small size, light weight, only a few components. And just turn 90 ° to quickly open and close, easy to operate, while the valve has good fluid control features. When the butterfly valve is fully open, the thickness of the disc is the only resistance to the flow of the medium through the valve body, so the pressure drop across the valve is small and therefore has good flow control characteristics. Butterfly valve seal and metal seal two types of seal. Flexible sealing valves, seals can be embedded in the body or attached to the butterfly plate around. Valves with metal seals generally have a longer life than elastomeric valves, but are harder to seal completely. Metal seals can adapt to higher operating temperatures, while flexible seals have temperature-limited defects. If the butterfly valve is required to be used as a flow control, the main choice is the correct size and type of valve. The structural principle of the butterfly valve is especially suitable for making large diameter valves. Butterfly valve not only in the oil, gas, chemicals, water treatment and other general industry has been widely used, but also used in thermal power station cooling water system. Commonly used butterfly valve clamp butterfly valve and flange two. The butterfly valve on the folder is to use double-headed bolts to connect the valve between the two pipe flanges, flanged butterfly valve is equipped with a flange on the valve, with bolts on both sides of the valve flange connected to the pipe flange.

Stainless Steel Flux Cored Wires

Stainless Steel Flux Cored Wires:


Stainless steel Flux Cored Wire can weld stainless steel easily and efficiently like carbon steel and low-alloy steel flux-cored wire. The application of stainless steel flux-cored wire is mainly MAG welding. MAG welding has the following characteristics; 1) with Compared with manual welding, the deposition speed can be increased by 2-4 times, and its deposition efficiency is as high as 90% (only 55% for stainless steel electrodes). and automated welding. 3) Good slag removal and glossy weld bead surface. In addition, less spatter, excellent arc stability, X-ray pass


Category

AWS standard

Chemical compostition of deposited metal(wt%)

C

Mn

Si

Cr

Ni

Mo

P

S

V

Cu

Fe

Stainless Steel Flux Cored Wire

CO2 Gas Shield

E308LT1-1

0.04

0.5-2.5

1

18.0-21.0

9.0-11.0

0.75

0.04

0.03

-

0.75

-

E309LT1-1

0.04

0.5-2.5

1

22.0-25.0

12.0-14.0

0.75

0.04

0.03

-

0.75

-

E309LMoT1-1

0.04

0.5-2.5

1

21.0-25.0

12.0-16.0

2.0-3.0

0.04

0.03

-

0.75

-

E316LT1-1

0.04

0.5-2.5

1

17.0-20.0

11.0-14.0

2.0-3.0

0.04

0.03

-

0.75

-

Stainless Steel Flux Cored Wire


Application: Flux cored wire Suitable for petrochemical, pressure vessel, food machinery, medical machinery, fertilizer and other industries, welding 18%Cr-8%Ni stainless steel (sus304, 304L, etc.).


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