Mechanical Seals

Type 11

Diaphragm Seals

Single spring, resilient, rubber diaphragm seal with two working length options, and a Type 11 boot mounted stationary, as standard, to suit common originally American housing sizes.

A widely utilised seal type, highly suited to general duties, capable of long service life. 

Also available as Type 11J with Type 31 centrally ‘O’-Ring mounted statoinary to fit same housing sizes and working lengths.

Can also be supplied as a rotary seal only to be installed with a variety of stationary seals.


  • Single spring, resilient, rubber Diaphragm Seal
  • Highly suited to general duties, capable of long service life.
  • Supplied with a Type 11 boot mounted stationary as standard

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.

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