In the entire flange joint design, the appropriate gasket type and size should be selected according to the design conditions and the medium used. The types of gaskets mainly include non-metal flat pads, metal pads, wound gaskets and solid metal pads, which are mainly selected according to the corrosiveness, temperature and pressure of the medium.
Non-metallic gaskets include rubber mats, insomnia rubber mats, PTFE mats and expanded (flexible) graphite. They are generally used in medium and low pressure and low temperature applications. Metal clad gaskets are flexible graphite and ceramic fiberboard. It is coated with galvanized iron sheet, aluminum, copper or stainless steel sheet, mainly for medium pressure and high temperature. The metal mat is mainly used in the high temperature and high pressure range, and the manufacturing cost is high due to the high processing quality and precision requirements of the pressing surface.
Wound gaskets are made of metal strips (08F, 0Cr18Ni9 Monel, etc.) and filled strips (flexible graphite, polytetrafluoroethylene). They are suitable for use in higher temperature and pressure ranges. The maximum operating temperature depends on the temperature. The ultimate temperature of the steel strip and non-metal fill tape used.
After the gasket type is selected, the gasket width must be properly selected. It can be known from the formula of the pressing force of the gasket pre-tightening state and the operating state that the width of the gasket is to be reduced, but the width of the gasket is limited by the "crushing strength" when the gasket is pre-tensioned.
In the medium and low pressure and determine the minimum bolt cross-sectional area required, the actual bolt area should be no smaller than this area. The key to its design is to determine the diameter of the center circle of the bolt as small as possible. The specific method is to conduct the test by selecting the appropriate bolt specifications and quantity.
Recessed Pool Light,Underwater Recessed Pool Light,Ip68 Recessed Underwater Light,Waterproof Recessed Pool Light
Shenzhen Poolux Lighting Co., Ltd. , https://www.pooluxled.com