Sanfitec Brass Industry Co.,Ltd. You are in our Global Site Sanfitec Brass Industry Co.,Ltd.
Sanfitec Brass Industry Co.,Ltd.
Sanfitec Brass Industry Co.,Ltd.

Types, Materials, and Performance of Sealing Rings and Gaskets in Brass Pipe Fittings

1. The sealing ring of brass pipe fittings refers to the round-shaped articles with sealing function, and the sealing gasket refers to the flat articles with sealing function.


2. The sealing rings of brass pipe fittings are classified according to the shape, which can be divided into O-rings, gaskets and special-shaped gaskets, and irregular O-rings. lt can be designed or selected in different types according to the use environment.


3. Common materials for the sealing ring of brass pipe fittings are rubber, PTFE, asbestos, compressed cardboard, etc. and common rubbers are NBR, EPDM, HNBR, FKM, silica gel, etc. Sealing materials with different properties can be selected according to the use environment. As shown in the following table:


Sealing materialsAdvantagesDisadvantagesApplicable environments
PTFECorrosion resistance, aging resistance, wear resistance, good lubricity, etc.It requires a lot of installation force to be compressed and sealed.Suitable for valve stem packing, ball valve sealing seat, and gaskets
Compressed cardboard
Corrosion resistance, aging resistance, wear resistance, good lubricity, etc.The hardness is higher than that of PTFE, and a greater installation force is required.Environments with hot and cold water and infrequent disassembly
AsbestosCorrosion resistance, aging resistance, high-temperature resistance, etc.Installation force is between PTFE and compressed cardboardHigh temperature and fireproof environments
NBR rubberOil and liquid fuel resistantHeat intolerantColdwater and oil-proof static sealed environments
EPDM rubberResistance to hot water, chemical stability, and ozoneNot resistance to oilHot water and static sealed environments
HNBROil-resistant, abrasion-resistant, and heat-resistant
Suitable for dynamic sealing environments requiring heat resistance and wear resistance
Silica gelHeat resistantNot resistant to oilSuitable for high-temperature liquid environment
FKMHigh temperature and low temperature resistance, oil resistance, solvent resistancePoor air tightnessSuitable for high and low temperature environment