How many kinds of seals are used in the heat transfer oil pump?

Conductive oil pump in the transport of different media temperatures will use different seals: 1, single-ended seal: the use of injection flushing, flushing fluid is about 100 ℃ minus second-line wax, the pressure is higher than the sealed cavity 0.05 ~ 0.15Mpa, The outside of the gland with hot water softener, quenching, the general can use a cycle of the tenth month. Second, the metal bellows machine seal: compact structure, easy installation, in the case of the same auxiliary system, the life of 2 to 3 times the normal seal. Third, double-end machine: the use of circular washing, plus external cooling, life is single 1.5-2 times. Fourth, the use of hard friction on the hard YG6 / YG8, SiC / SiC, on the high viscosity, with a small amount of solid particles of the media or crystallization of media, with good results.