Manuel luftventil is a common type of valve in the industrial field, mainly used to control gas flow. In manual air valves, the sealing gasket is a key component and plays an important role in maintaining the sealing performance of the valve.
Kravene til tætningspakninger af manuelle luftventiler omfatter hovedsageligt korrosionsbestandighed, højtemperaturbestandighed, trykmodstand, god tætningsevne og slidstyrke. Først og fremmest, da manuelle luftventiler ofte bruges i kemiske, petroleums-, farmaceutiske og andre miljøer, skal deres tætningspakninger have god korrosionsbestandighed og være i stand til at modstå erosion af forskellige korrosive medier. Almindelige tætningspakningsmaterialer omfatter gummi, polytetrafluorethylen (PTFE) osv. Disse materialer har fremragende korrosionsbestandighed og kan bruges i lang tid uden skader.
For det andet kan manuelle luftventiler støde på højtemperaturmiljøer i nogle industrielle processer, såsom olieraffinering, kemisk industri og andre områder. Therefore, the sealing gasket needs to have good high temperature resistance and be able to maintain its elasticity and sealing performance. Nogle specielle højtemperaturforseglingsmaterialer, såsom polytetrafluorethylen (PTFE) forstærkede materialer, grafit osv., kan opretholde god tætningsevne i højtemperaturmiljøer.
In addition, since the manual air valve is used to control gas flow, its sealing gasket needs to have good pressure resistance. In industrial processes, gas pressures can be very high, so sealing gaskets need to be able to withstand high pressures without leaking. The pressure resistance of a sealing gasket is closely related to the strength of its material and structural design.
At the same time, the sealing gasket of the manual air valve needs to have good sealing performance to effectively prevent gas leakage. Tætningspakningen skal være i tæt kontakt med ventilhuset og ventilkernen eller ventilpladen og være i stand til at modstå stort tryk for at sikre ventilens tætningsevne. The material selection, structural design and processing accuracy of the sealing gasket will all affect its sealing performance.
Finally, the sealing gasket of the manual air valve may be worn during long-term use. Therefore, the sealing gasket needs to have certain wear resistance and be able to maintain its sealing performance during long-term use. Nogle specielle tætningspakningsmaterialer, såsom polytetrafluorethylen (PTFE) forstærkede materialer, polyimid osv., har bedre slidstyrke.