Cylindrical plug valves used in a certain extent, depends on the plug with the valve body sealing. General cylindrical plug valves often use four kinds of sealing method, namely using sealant, using plug expansion, using 0 seal ring, the use of eccentric plug seat sealing wedge. Cylinder lubrication plug valves sealed by sealant to achieve between the plug and body. Sealant is bolted or rod into the sealing face of the plug injection gun, so when the valve is in use, can be added by injecting sealant to effectively make up for the inadequacy of the seal. Because of the sealing surface in full open position when being protected and not in contact with the liquid medium, so the lubrication plug valve is particularly suited to abrasive medium. But lubricated plug Industrial Valves should not be used for throttling, this is because the throttle when from revealing the hedge sealants seal face, so that every time the Industrial Valves is closed, to reply on the seating. The faults of the valve is sealant to add artificial often needed to do, using automatic injection can overcome this shortcoming, but need to increase the cost of carry equipment. Once due to lack of maintenance or due to the sealant choosing inappropriate, or between the sealing surface crystallization and plug in the body can't turns, then must clean or repair the valve. Cylindrical plug valve, the valve body is equipped with a teflon sleeve and the valve plug seal, it USES compression nut pressure inside the body, by the valve plug expansion force of teflon sleeve to seal. In this paper, the keyword search: more technical articles valve product supply information
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