There was a rift pneumatic valve welding of stainless steel is what reason is caused?

Stainless steel pneumatic valve in the pipeline is mainly used for cutting, distribution, and change the flow direction of medium, it just has to rotate 90 ° operation and small rotational torque can be closed tightly. Pneumatic valve suitable for switch, cut off the pneumatic valve is used.

the pneumatic valve is typically used rubber, nylon, and ptfe as pneumatic seat sealing material, therefore its use temperature is limited by a pneumatic seat sealing material. As function of pneumatic valve is on the metal body under the action of medium, for plastic pneumatic pressure to complete each other between the seat ( Floating pneumatic valve) 。 Pneumatic seat sealing under the effect of contact pressure, the elastic-plastic deformation of local region

. The deformation can be made of the manufacturing precision and surface roughness of body, to ensure that the pneumatic valve sealing performance.

stainless steel pneumatic valve installation, such as the clamp, flange, threaded and welding. Depending on the use environment and the mind, can choose pneumatic valve connection.

stainless steel pneumatic valve some condition occurs on welding, welding stainless steel pneumatic valve we remember that the choice of it. If the WCB, we choose gb, is A3 or other high manganese iron of high carbon easy to burst during welding. Or when welding, pneumatic valve body fracture or a significant rift. The stainless steel pneumatic valve we should choose the material of more than 304 or 304. Can

in order to make sure all pneumatic valve welding when the an and late stable an full use.

there was a rift pneumatic valve welding of stainless steel is what reason is caused?

1。 Is due to the welding current is too high. Or did not choose argon arc welding, which makes stainless steel at high temperature change the density of intergranular cracking;

2。 Pneumatic valve body material itself, pneumatic valve body due to the carbon content is higher, at the time of welding, because the hardness is higher, the chapped by high temperature can make the stainless steel.

so when selecting stainless steel pneumatic valve to avoid cracks or quality problem, should choose to have the good faith of the manufacturers, 304 materials need to meet the national standards. And to bring the material quality certificate.