Mechanical seal under the high temperature?
1 mechanical seal is how to work in high temperature environment?
Mechanical seal manufacturers choose how to do?
In general, medium temperature over 120 ℃ is considered to be heat-sealed.
To guarantee the normal work of the mechanical seal under the environment of high temperature, the mechanical seal of jiashan to introduce how to make mechanical seal work.
1, add cooling to machine seal flush device.
2, and the choice of high temperature resistant material, selected according to different working temperature of different material.
Nitrile rubber temperature up to 80 ℃, silicone rubber is 200 ℃ and fluorine rubber, ptfe is 250 ℃.
In addition, the mechanical seal of the non-metallic friction pair with graphite impregnated material, so also should choose different types according to different working temperature of impregnated graphite.
Dipped babbitt graphite suitable temperature range is less than 150 ℃, leaching resin graphite suitable temperature range of 170 ~ 200 ℃, leaching of copper, aluminum, lead, graphite can be less than 400 ℃ under the working conditions of use.
Ring components should choose expansion coefficient of similar materials, as far as possible in order to prevent the high temperature ring and ring connection is loose.
3, choose metal bellows mechanical seal.
Metal bellows seal used in high temperature seal many in recent years, and has achieved good effect.
In this kind of machine to seal, metal bellows replaced PuTongJi seal in the spring, get rid of the auxiliary seal ring, do not need to overcome the ring compensation with shaft friction and wear, so use at high temperatures, generally can obtain good result.