What are the characteristics and applications of elastic bellows mechanical seals?

The core feature of elastic bellows mechanical seal is to combine the elastic element (bellows) with auxiliary sealing function, thereby achieving more stable and reliable sealing effect under harsh working conditions such as high temperature and high pressure.

Its main advantages are:

Compact structure: eliminates the need for independent springs and auxiliary sealing rings, simplifies the design, and is particularly suitable for space constrained situations.

High temperature and high pressure resistance: Metal corrugated pipes can withstand higher working temperatures and pressures, solving the problem of traditional seals being prone to failure of auxiliary sealing materials at high temperatures.

Automatic compensation: The corrugated tube itself has good elasticity and can automatically compensate for the wear of the sealing surface, maintaining a tight fit of the sealing surface.

Negative pressure resistance: In low-pressure or negative pressure environments, the bellows seal can still work effectively to prevent medium leakage.

This sealing form is widely used in:

Petrochemical industry: such as LPG pumps, high-temperature oil pumps, etc., dealing with flammable, explosive, high-temperature and high-pressure media.

Energy and electricity: used for equipment such as boiler feed pumps and steam turbines.

Pharmaceutical and food: occasions with high hygiene requirements and strong corrosive media.