255, 255); ">z61y welded forged steel gate valve introduction:
Forged steel gate valves have three bonnet designs. The first is the bolted bonnet. For the valve designed according to this design form, the valve body and bonnet are connected with bolts and nuts, and the spiral wound gasket (made of 316 clip flexible graphite) is sealed. Metal ring connection can also be used when customers have special requirements. The second design form is the Welded Bonnet. For the valve in this design form, the valve body and bonnet are connected by threads and sealed by full welding. When the customer has special requirements, it can also adopt full welding connection. The third is the pressure self tightening bonnet. For the valve designed according to this design form, the valve body and bonnet are connected by threads, and the internal pressure self sealing ring is sealed.
● gate valve design structure and description features
Gate valves are designed in accordance with apl602, bs5352 and ASME B16.34. Inspection and testing shall be in accordance with apl598, and marking shall be in accordance with mss-sp-25.
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