Type N11 / U11 - Diaphragm Mechanical Seal | Vulcan Seals
Mechanical Seals

Type N11 / U11

Diaphragm Mechanical Seals

Type N11 Diaphragm Mechanical Seal

Single spring, rubber diaphragm seal, similar to Type 11/22, but with reduced O.D. (D3) to give full ANSI seal chamber compatibility.

Type N11 with a resilient elastomer mounted face is the preferred design supplied up to its design limit of 2.000” / 50 mm.

Type U11 features a retainer lug driven face and is the preferred design for all sizes above 50mm/2.000".

Also available as assembly Type N11J or U11J with a Type 31 centrally ‘O’-Ring mounted seat to fit same housing sizes and working lengths.


  • Single spring, rubber diaphragm Seal
  • Resilient elastomer mounted face
  • To suit ANSI/DIN Seal profile compatibility

Operating Limits

  • Temperature: -30°C to +150°C
  • Pressure: Up to 12.6 bar (180 psi)
  • For full Performance Capabilities please download data sheet

Limits are for guidance only. Product performance is dependent on materials and other operating conditions.

Send us an enquiry

To help us provide you with the best answer, please provide as much of the following as possible:

  • Vulcan Type Number
  • Shaft size
  • Seal face materials
  • Elastomer materials
  • Quantity

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