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Home > Gaskets & Pads Type > Chamber Port Plugs, Foam Port Plugs, E-Plugs

Chamber Port Plugs, Foam Port Plugs, E-Plugs™ for Environmental Test Chambers

Custom Port Plugs

Stockwell Elastomerics manufactures a variety of standard, semi-custom and custom silicone foam port plugs for environmental test chambers, with product name E-Plug™.

Many OEMs who manufacture ruggedized equipment often use gaskets, seals, cushion pads and other elastomeric components made by Stockwell Elastomerics. "Rugged" could simply mean an electronic device that can survive being rained on, while others must function in extreme temperatures, rain, water submersion, high humidity, salt spray, etc. Very often the gaskets and seals for these devices are manufactured from silicone rubber due to its wide temperature range, soft durometers, UV resistance, and good resistance to humidity and salt fog.

To ensure that an engineering design is robust enough, devices may be lab tested for some or all of the mentioned conditions in an environmental test chamber. It's common for these test chambers to have access ports for cabling – so it makes sense that the sealing plugs for these chambers be manufactured from silicone materials as well to withstand many test cycles. In response to this need for port plugs used with environmental test chambers, Stockwell Elastomerics developed and manufactures standard and custom chamber port plugs used by test engineers.


Standard E-Plug™

Stockwell Elastomerics offers standard sized E-Plugs™ - environmental chamber access port plugs that are conformable to allow the pass through of cables, and also offer excellent thermal insulation. Standard E-Plugs™ are 4" thick with a thin closed cell silicone foam top layer. E-Plugs™ are slightly oversized to make a press fit into the test chamber. Standard E-Plugs™ are available and ready to ship in the following sizes:

  • E-Plug™ 8 - for 8" OD port (8.25" OD actual)
  • E-Plug™ 6 - for 6" OD port (6.25" OD actual)
  • E-Plug™ 5 - for 5" OD port (5.25" OD actual)
  • E-Plug™ 4 - for 4" OD port (4.25" OD actual)
  • E-Plug™ 3 - for 3" OD port (3.25" OD actual)
  • E-Plug™ 2 - for 2" OD port (2.25" OD actual)

Semi-Custom E-Plug™

Semi-custom E-Plugs™ are made in the standard E-Plugs™ sizes but with added features, listed below. To specify a semi-custom E-Plug™, add one of the suffixes to the standard size to designate the feature.

  • E-Plug X-PH - Pull Handle, for easier removal
  • E-Plug X-CC - Concentric Cut, allows more conformity for cables
  • E-Plug X-SE - Sealed Edges, for high humidity tests
  • E-Plug X-EC - ESD coated to reduce static buildup

Example: E-Plug 6-PH is a 6.25" OD E-Plug with a pull handle added


Custom E-Plug™

Silicone Foam Chamber Port Plugs

In addition to standard and semi-custom E-Plugs, Stockwell Elastomerics offers custom chamber port plugs, made to customer specified geometries. Most custom environmental test chamber plugs are manufactured from the same 4" thick, high and low temperature silicone foam, offering excellent conformability and thermal insulation. Custom environmental chamber plugs can be manufactured with any feature mentioned above for semi-custom E-Plugs™.


Contact Stockwell Elastomerics for Chamber Port Plugs

Contact Us for further assistance with silicone foam cort plugs, including standard E-Plugs™, semi-custom E-Plugs™, and custom E-Plugs™ for use with environmental test chambers.


E-Plugs™ is a trademark of Stockwell Elastomerics, Inc.