What are the common mechanical seals for high temperature medium pumps? Machinery Seal

What are the common mechanical seals for high temperature medium pumps?

Commonly used mechanical seals for high-temperature medium pumps:

⑴Hot water pump

Mechanical seal for recirculating hot water pump of waste heat boiler. The characteristics of this kind of mechanical seal are: both the dynamic and static ring seats are made of titanium metal, the expansion coefficient is small, and it is close to carbonization, so it is easy to fix the dynamic and static rings; the auxiliary seal adopts PTFE V-shaped sealing ring to ensure The followability of the dynamic and static rings at working temperature; the self-flushing is adopted from the outlet liquid cooler, and the cooling high-pressure liquid is sent to the shaft seal box for flushing. Within limitations, the problem of high temperature aiding sealing is solved. Among them, the heat transfer area of ​​the cooler is 1 square meter, the pipe length is 23.3m, the circulating water volume is 6L/min, and the cooling water volume is 60L/min.

⑵High temperature oil pump mechanical seal

In petrochemical and oil refining assembly, hot oil pumps with higher temperatures include tower bottom hot oil pumps, heat carrier pumps, oil slurry pumps, residual oil pumps, wax oil pumps, asphalt pumps, molten sulfur and plasticizer pumps, etc.

In high-temperature oil pumps, the sealing pair adopts hard-to-hard to solve the mechanical seal of the hot oil pump at the bottom of the vacuum tower containing solid particles at low pressure, the elastic element adopts welded metal bellows to solve the heat oil pump seal under different pressures, and the cooling jacket of the shaft seal box is used Reduce the temperature to solve the thermal oil pump seal, use fin cooling shaft seal box protection to help seal solve the thermal oil pump seal and adopt double-end seals, strengthen flushing and other errors.