Valve trapezoidal thread, stem nut and stent sliding parts, bearings, gears and parts of meshing worm and worm parts and other parts, with activity takes good lubrication conditions and reduce the friction between each other, avoid mutual abrasion. Some parts specially equipped with oil cup or nozzle, if in operation of damage or loss, should repair addressed to dredge oil-way. According to the specific circumstances lubrication part should be lubricated periodically. Often open and high temperature of the valve suitable intervals weeks to a month refueling one time. Often do not open, temperature is not high valve refueling cycle can be some length. Lubricants have oil, butter, disulfide key and graphite etc. Not suitable for high temperature valve with oil, butter, they would drain away because of high temperature melting, and suitable for injection disulfide key and wipe brush graphite powder. The need for bare outer lubrication areas, like the trapezoidal thread, gear, etc parts, if you use butter oil, easily infected with dirt, and use disulfide key and graphite powder lubrication, do not easily infected with dirt, grease effect than butter. Graphite powder not easy direct daub, can use a few oil or water adjustable synthesis cream use. Note oil sealing plug valves shall, in accordance with the prescribed time note oil, otherwise easy to wear and leakage.

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