Threaded connection is a simple connection method, which is often used in small valves.
There are two cases:
1. Direct sealing: internal and external threads directly play a sealing role. In order to ensure no leakage at the joint, lead oil, twine and PTFE raw material belt are often used for filling; Among them, PTFE raw material belt is widely used; This material has good corrosion resistance, excellent sealing effect and convenient use and storage. It can be completely removed during disassembly because it is a layer of non sticky film, which is much superior to lead oil and hemp.
2. Indirect sealing: the force of thread tightening is transmitted to the gasket between the two planes to make the gasket seal.
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