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There are three kinds of forged steel gate valve bonnet design, one is bolt type bonnet, through the concave and convex surface connection, stainless steel band and flexible graphite wound gaskets, ring joint may be adopted according to the demand, the second is welding type bonnet, after thread sealing welding, and the rigid welding according to the requirements can be directly used, the third is the sealing cover, since the seal bonnet joint with thread.

Product model: Z11Y/Z61Y
Nominal size: NPS3/8"~2"
Nominal pressure: Class150~2500Lb
Applicable medium: water, steam, oil, etc
Applicable temperature: -29℃ ~ 550℃
Main materials: A105, A182 F22, A182F 304L, A182 F316L
Manufacturing standard: API 602,BS5352,ANSI B16.34
Test and acceptance: according to API 598, identification according to MSS SP-25