EN CN
Home / Services / Pump Encyclopedia / Pump Thesaurus / Mechanical seal

Mechanical seal

24 Jul 2018Email

Mechanical seal refers to a device for preventing fluid leakage is formed by at least one pair of end faces perpendicular to the rotation axis under the action of the fluid pressure and the compensating mechanism elastic force (or magnetic force) and the auxiliary seal. The elastic loading mechanism and the auxiliary seal are mechanical seals of the metal bellows. We call them metal bellows seals. In the light seal, there is also a rubber bellows for auxiliary sealing. The rubber bellows has limited elastic force, and generally needs to be supplemented with a spring to satisfy the loading elasticity.

Mechanical seals are shaft seals for rotating machinery. Such as centrifugal pumps, centrifuges, reactors and compressors. Since the drive shaft runs through the inside and outside of the device, there is a circumferential gap between the shaft and the device. The medium in the device leaks outward through the gap. If the pressure inside the device is lower than atmospheric pressure, the air leaks into the device, so there must be a A shaft seal that prevents leakage. There are many types of shaft seals. Because mechanical seals have the advantages of less leakage and long life, the world's mechanical seals are the most important shaft seals in these equipments.

The main components
Moving ring, static ring, cooling device and compression spring (depending on the specific equipment).

Auxiliary seal
Sealing ring (O-shaped, X-shaped, U-shaped, wedge-shaped, rectangular flexible graphite, PTFE coated rubber O-ring, etc.).

Elastic compensation mechanism
Spring, push ring.
Spring seat and key or various screws.

Classification
Divided into single end, double end; balanced, unbalanced

Related Pump Knowledge
More Pump Knowledge
25 Jan 2023
(1) Check whether the stainless steel pump and pipeline and joint are loose. Turn the stainless steel pump by hand and try whether the stainless steel...
Read more
25 Jan 2023
Vertical blowdown pump shaft seal form for power seal can be divided into back blade seal and auxiliary impeller seal two categories....
Read more
25 Jan 2023
Basic skills for the maintenance of submerged sewage pump:...
Read more
25 Jan 2023
Water pump mechanical seal system ---- pressure control system in the parameters of mechanical seal, pressure, cycle speed, temperature are closely re...
Read more
Related Products
More
Split Case Pump
Split Case Pump
  • Capacity:60-33005m³/h
  • Head:0.95-30.2bar
  • Price:$2200-215000
Double Suction Pump
Double Suction Pump
  • Capacity:60-33005m³/h
  • Head:0.95-30.2bar
  • Price:$2200-215000
Single Stage Chemical Pump
Single Stage Chemical Pump
  • Capacity:5.5-2600m³/h
  • Head:1.6-25bar
  • Price:$4300-37000
End Suction Chemical Pump
End Suction Chemical Pump
  • Capacity:5.5~400m³/h
  • Head:0.42-12.5bar
  • Price:$560-9800
Need More Information?
Contact us for more details about our pump, solutions and services.
Contact ZB
Tel
0086 731 88192011
Leave a message
Name*
Tel
Email*
Area
Products
Split Case Pump
Metallurgy
Mining Industry
Urban Water Supply
Petrochemical
Light Industry
Electricity
Chemical Industry
Farmland Irrigation
Other
Provide your comments and questions.