1. The added vacuum spring shock absorber refers to a ring-type vacuum spring shock absorber, which is used as a working fluid to achieve suction, compression and exhaust by changing the volume of the spring shock absorber cavity to achieve the purpose of vacuum extraction. This spring shock absorber can extract vapors and corrosive gases.
2. The oiled vacuum spring shock absorber refers to the vacuum spring shock absorber. The gap between the rotary vane and the spring shock absorber cavity is sealed by oil. The vacuum degree is much higher than that of the ring vacuum spring shock absorber. Do not smoke steam and corrosive gases;
3. Oil-free vacuum spring shock absorbers are often used in a clean environment and will not pollute the products produced.