What kind of mechanical seals are used in sink rolls
Sink rolls are a common type of industrial equipment, most commonly seen are hot-dip galvanized sink rolls or stainless steel sink rolls. It is usually used in the printing industry and high temperature boiler fields.
But some people don't know that, in fact, sink rolls sometimes need to use mechanical seals. Then we may have seen mechanical seals for pumps, mechanical seals for reactors, etc., so what is the mechanical seal of sink rolls?
The mechanical seal used for sink rolls is actually similar in principle and use. It is a device with better sealing performance, which is a device to prevent liquid leakage and pollute the environment. Then the general sink rolls mechanical seal is composed of end face seals, auxiliary seals, elastic elements, etc., and in order to make high-quality mechanical seals, the materials used for these elements are also very important.
The materials for end face sealing are generally graphite, ceramics, surfacing cemented carbide, tungsten carbide alloy, SiC, filled PTFE, tin bronze, steel-bonded cemented carbide, stainless steel, phenolic plastic, nylon, etc. The material requirements of the auxiliary sealing ring are good elasticity, small friction coefficient, good wear resistance, heat resistance and low temperature resistance, resistance to medium corrosion, dissolution and aging, etc. In addition, it also requires good residual deformation after compression and long-term use. Commonly used auxiliary sealing ring materials are rubber and teflon, in addition to soft polyvinyl chloride. The elastic element material is generally the selection of the spring material and the bellows material. The requirements for the spring material are: good elasticity and medium corrosion resistance. Commonly used spring materials are stainless spring steel (1Cr18Ni9Ti, etc.), chrome steel (3Cr13, 4Cr13, etc.), carbon cable spring steel (60si2Mn, etc.) and phosphor bronze. The requirements for bellows materials are: good welding performance, greater elasticity, and certain corrosion resistance. Commonly used bellows materials include iron-based, copper-based and nickel-based alloys and titanium materials. Generally, nickel-chromium austenitic strips in titanium-based are mainly used, especially 1Cr18Ni12Mo2Ti is used the most.
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