vacuum pump system of improve the sealing

How to improve the sealing of  vacuum system of vacuum pump unit is mainly to strengthen the repair of the leakage of vacuum system.

Measures to improve the sealing of vacuum pump system:

How to improve the sealing of vacuum system of vacuum pump unit is mainly to strengthen the repair of the leakage of vacuum system.

1. in the overhaul of vacuum pump shaft seal clearance adjustment, by using the method of roll tape, adjust the gap to 0.35 ~ 0.45 mm, but in the vacuum pump in the operation of the unit, on the premise of no water in the lubricating oil, to improve the shaft seal steam pressure as much as possible.

2. Improve the structure of low-pressure explosion proof doors. After the modification of the flame-proof door structure, the inside of the flange is sealed with reinforced graphite pad, the outside is made of asbestos cardboard pad, and the inside flange is sealed with high and low order. During the overhaul, 2mm thick high-pressure cardboard diaphragm was replaced. During the assembly, hz-1213 oil-resistant silicone sealant was applied to each joint surface to ensure the tightness of each joint.

3. For the vacuum system below the condenser’s throat, the leakage point can be eliminated by irrigation.

4. In order to solve the problem that the clearance value of the joint between the low pressure inlet and the middle section of the low pressure cylinder and the low pressure cylinder is large, the low pressure upper cylinder and the middle section of the low pressure cylinder are recombined. Combination process, the replacement of the combined vertical face seal coating, the red lead powder 20% ~ 25%, 25% ~ 30% reduced iron powder fineness 200 purpose, fine black lead powder, 50% by weight to Westinghouse TR3 type cylinder sealing grease modulation of production, low pressure cylinder middle also adopts the coating; For the horizontal midsection of the junction between the middle section of the low pressure cylinder and the low pressure cylinder, apply the coating with a thickness of 0.50 ~ 1.0mm first, and then add sealant to the coating layer. The cylinder is sealed with sealant.