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Mechanical seals for Jabsco pumps

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Mechanical seal for Jabsco pump

The design of the mechanical seal consists mainly of two parts: a movable part and a fixed part. The fixed part is usually a ring that is fixed in the pump housing. The movable part is mounted on the shaft and is pressed against the fixed part by means of a spring. Mechanical sealing is achieved using secondary seals (bellows, rubber rings) and a friction pair. When choosing a mechanical seal, it is important to choose the material of the secondary seals and friction pairs.

Jabsco Mechanical Shaft Seal Materials

rubber material:

  • NBR (nitrile butadiene rubber), temperature resistance -20 to +120C
  • EPDM (ethylene-propylene rubber), temperature resistance -30 to +170C
  • Viton (fluoroelastomer), temperature resistance -30 to +185C
  • PTFE (fluoroplast), temperature resistance -260 to +260C

Friction pairs

  • SUS - metal (stainless steel)
  • CAR - graphite
  • CER - ceramics
  • SIC - silicon carbide
  • TC - tungsten carbide

It is visually difficult to understand how these materials differ from each other (except for PTFE), so it is easier to choose a material based on the pumped medium and its temperature. Contact us, we will help you determine the material and choose the mechanical seal you need for your Jabsco pump.

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