The leakage causes of pneumatic valve and pneumatic valve cover v solution. 2)

the reason. Iron casting quality, pneumatic valve body and valve cover in the body of the blisters, loosely organized, defects such as slag. Cold crack; 。 Bad welding, slag, weld, stress cracks. After casting iron pneumatic valve damage by weight for the prevention and solution. In order to improve the strength of the castings and the test rules, in strict accordance with the quality, before installation. 。 In ° and temperature under pneumatic valve, should mix insulation or heat, stop using the water of the pneumatic valve should be excluded. By pneumatic valve body welding and welding forming, pneumatic valve cover operation procedure should be welding, after welding test and strength test should be performed; 。 Pushing for heavy, cast iron pneumatic valve, banned are not allowed to non-metallic hammer impact pneumatic valve, pneumatic valve installation of large diameter should be standing in the
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