Ametek L Series Diaphragm Seals - Automation Service

Ametek L Series Diaphragm Seals

Ametek Diaphragm Seals from Automation Service

L Series Diaphragm Seals

Ametek - U.S. Gauge

L Series Diaphragm Seals

Diaphragm Seals / Capillaries

Description - Type L Series diaphragm seals feature removable, elastomer diaphragms that may be replaced or repaired if required. These seal elements are intended for low pressure sensitivity instruments such as bellows and diaphragm type gauges. They are sensitive to pressure changes as low as 2” H2O (51 mm H2O at 4°C).

Type L Series diaphragm seals employ diaphragms retained between two bolted members. In the clean-out design, the diaphragms are situated between the top and middle ring. In the LB and LG design, the diaphragms are located between the top and bottom. The diaphragm is loosely retained in the upper housing for easy repair or replacement. This extends the life of the seal element and allows for field replacement and service.


  • Removable elastomer diaphragms

    • Ideal for low pressure sensitivity bellows and diaphragm type gauges

  • Materials available for corrosive applications

  • Superior low pressure response

    • Pressures as low as 2” H2O

  • Large volumetric displacement

    • 1.38 cubic inches

  • Seal ratings to 5000 psig (345 bar)



All remanufactured products:

  • 2-3 Weeks Standard Delivery
  • 2-5 Days Expedited Delivery
  • Need it sooner? call us today at 1-800-325-4808


– U.S. Gauge products:

  • 4-8 weeks

Rotork® electric actuators

  • Please contact us for delivery


All remanufactured products are covered by our 2 year service warranty. Please click here to view full warranty.

Ametek® – U.S. Gauge Products are covered by the original manufacturer’s warranty. Please click here for warranty information.

Rotork® Electric Actuators – please contact us for warranty information.

New Foxboro® products are covered by a 1 year service warranty by the original manufacturer.