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Bellow seals

BIA Elastomer Bellow Mechanical Seal
  • BIA Elastomer Bellow Mechanical Seal Rotary
  • BIA Elastomer Bellow Mechanical Seal
  • Type 21 Elastomer Bellow Mechanical Seal
  • Type 21 Elastomer Bellow Mechanical Seal
  • YALAN Type 43 Elastomer Bellow Seal
  • YALAN Type 43 Elastomer Bellow Seal
  • BIA Elastomer Bellow Mechanical Seal

YL BIA, Type 21, Type 43


Basic Features

  • Structure: Single End
  • Pressure: Medium Pressure Mechanical Seals
  • Speed: General Speed Mechanical Seal
  • Temperature: General Temperature Mechanical Seal
  • Performance: Wear
  • Standard: DIN24960, ISO3069, GB6556
  • Model NO.: BIA, Type 21, and Type 43
  • Balance: Unbalanced
  • Specification: Inner Diameter: 12 mm to 100 mm

Product Detailed Description

BIA (also known as Type 21 or Type 43) Mechanical Seal for Clean Water Pumps, Piping Pumps and Vacuum Pumps

Structural Features: single end, unbalanced, independent direction of rotation, rubber bellow, bellow transmission. This component has a compact structure with good compatibility, stablity and easy installation.

Industrial Standards: DIN24960, ISO3069, GB6556

Scopes of Application: widely used in oil and water circulation pumps, piping pumps, and vacuum pumps for industries such as sewage treatment and paper-making. This product can be an alternative to similar products from EG&G SEAL OL.

  • Operation Parameters:

    • Pressure: 0.8 MPa or less
    • Temperature: - 20 ~ 120 ºC
    • Linear Speed: 10 m/s or less


    • Rotary Ring Face: Carbon/SiC/TC
    • Stationary Ring Face: Al2O3/SiC/TC
    • Elastomers: NBR/EPDM/Viton
    • Springs: SS304/SS316
    • Metal Parts: SS304/SS316

    Mediums: oil, water, weak acid and alkali and other corrosive mediums.

    Customization: Changes of materials for getting other operating parameters are possible. Contact us with your requirements.

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YALAN Seals Global
Anhui, China
21st Floor, Lanjing International Tower
Yaohai, City of Hefei

+86 551 6428 7402

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