Thread sealing

Thread seal on the pump, there are two ways , one is threaded coupling gasket seal , one is filled with economy plus thread sealing , Both small diameter threaded connections for sealing applications . Threaded coupling gasket sealing gasket seals are , but only as provided threaded clamping force. In addition to the sealing effect of the gasket outside its performance . The roughness of the sealing surface relative to the threaded hole of the sealing effect of the geometric positional accuracy of great impact .rail car seals The gasket is tightened by a screw not only withstand the pressing force , the torque is also exposed , the spacer is deformed or damaged , so that when the gasket is non-metallic , generally apply only where the pressure is not high , if the spacer metal above apply pressure up to 30Mpa .
Pump plugs frequently used , is another form of thread sealing . Taking into account the manufacturing economy plugs , generally can not play alone with threaded seal, often with raw tape, sealant fillers for thread sealing gap . Its bearing capacity depends on thread manufacturing precision and material, with plugs and threaded hole with the form does not matter. Threaded holes with plugs either a " cone on cone" or " columns on the cone" , the seal has the same effect , but using different regions only.
China currently uses two forms of the same . Affect the sealing effect is a common cause when machining starting hole size is too large , so that the thread deformation short crest wider, resulting in the sealing surface decreases, when the seal leak after pressure rises ,security seal and even plugs pressed out . As filler medium to be sealed leak corrosion phenomena in the chemical industry pumps also have occurred, so the choice of filler is also one of the factors considered sealed .