CI Series Internal Seal Air Actuated Connectors

The CTS Connect CI series pneumatic connectors effectively seal the inside diameter (ID) on smooth, rough, or threaded circular features of a part. These pneumatic connectors consist of an air-driven internal piston that compresses the CTS-proprietary seal material against the surface of the part, creating a tight seal that meets all test pressure requirements regardless of surface shape or finish.
 
Sealing ranges of 0.270” ID to 4.125 ID and all standard NPT, SAE, Metric and BS design fittings. Rated up to 120 psig hold force on a part.
Five different models of CTS Connect CI air actuated seals clustered together.

Find the CI Connector for Your Application

Browse the model categories below or use the configurator to identify connects that meet your requirement.

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CI30

The CI30 Connector will seal the inside diameter of a pipe or tube and has a sealing range from 0.270 to 0.394” (7 to 10 mm) including 1/8” NPT, in incremental ranges or internal pipe thread sealing applications.
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CI31

The CI31 Connector will seal the inside diameter of a pipe or tube and has a sealing range from 0.394 to 0.630” (10 to 16 mm) including 1/4" NPT, in incremental ranges or internal pipe thread sealing applications.
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CI32

The CI32 Connector will seal the inside diameter of a pipe or tube and has a sealing range from 0.630 to 0.866” (16 to 22 mm) includes 3/8" and 1/2" NPT, in incremental ranges or internal pipe thread sealing applications.
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CI33

The CI33 Connector will seal the inside diameter of a pipe or tube and has a sealing range from 0.866 to 1.102” (22 to 28 mm) includes 3/4" NPT, in incremental ranges or internal pipe thread sealing application.
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CI34

The CI34 Connector will seal the inside diameter of a pipe or tube and has a sealing range from 1.102 to 1.339” (28 to 34 mm), in incremental ranges or internal pipe thread sealing application.
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CI35

The CI35 Connector will seal the inside diameter of a pipe or tube and has a sealing range from 1.339 to 1.693 inches.
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CI36

The CI36 Connector will seal the inside diameter of a pipe or tube and has a sealing range from 1.693 to 2.165” (43 to 55 mm), in incremental ranges or internal pipe thread sealing application.
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CI37

The CI37 Connector will seal the inside diameter of a pipe or tube and has a sealing range from 2.165 to 2.585” (51 to 65.7 mm), in incremental ranges or internal pipe thread sealing application. 
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CI38

The CI38 Connector will seal the inside diameter of a pipe or tube and has a sealing range from 2.585 to 3.005” (65.7 to 76.3), in incremental ranges. 
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CI39

The CI39 Connector will seal the inside diameter of a pipe or tube and has a sealing range from 3.005 to 3.565” (76.3 to 90.6 mm), in incremental ranges. 
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CI40

The CI40 Connector will seal the inside diameter of a pipe or tube and has a sealing range from 3.565 to 4.124” (90.6 to 104.7 mm), in incremental ranges. 

Fast Delivery of Inside Diameter Seals

The CI Connects are in stock typically with a five-day lead time. That is not the only reason to choose CTS internal diameter connectors:

  • Superior sealing capability without the risk of scratching the surface of the part
  • Automated sealing to minimize operator fatigue and injury
  • Threaded and tapered connector nose
  • Large test/fill port holes for better conductance
  • Easy seal replacement
  • Material grade provides long seal life
  • Medical grade seals available 
Engineering rendering showing a cut-out in a CTS CI connector detailing the stroke limiter function.

Patented Stroke Limiter Ensures Positive ID Seal

The built-in stroke limiter is key to providing a positive seal. When the seal is actuated outside of a port, the stroke limiter will stop before the seal is over-extended. This CTS-patented technology helps reduce wear on your seals.

Talk to Us About Your Sealing Design

Request a quote for the pneumatic seals and pneumatic fittings your application requires or contact us to learn more about our high-performance CTS Connect products.
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