I don't know the size of your gate valves, but for smaller ones, using a Kammpro gasket (with a Monel core) might not be suitable for the seal between the bonnet and the body of very small valves. However, using a welded bonnet design can significantly improve the sealing performance in...
You can refer to the following standards：
MSS SP-134
Valves for Cryogenic Service Including Requirements for Body/Bonnet Extensions
Specifies requirements for extended bonnet lengths.
Outlines measures to prevent abnormal pressure build-up.
Specifies testing procedures including...
