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COB Low Pressure Nylon Expansion Plugs

Sizes 0.5" to 6"

low pressure nylon plugs

 

Low Pressure Nylon Expansion Plugs

Nylon 6 is an engineered polymer which is resistant to salt water corrosion it is also resistant to many other chemicals.

Along with natural rubber rings they provide a high quality leak tight seal in the selected orifice.

There are two types:

  • A solid shaft SS version with five sizes from 0.5" (12mm) up to 1.5" (38mm)
  • A hollow shaft VS version with eleven sizes from 0.5" to 6" inclusive. The hollow shaft allows:
    • Water or gas to be injected or drained as required.
    • Sizes of 1.5 inch and above are threaded with a half inch BSP for the connection of standard nuts/hose fittings is provided with a solid end cap seal are fully demountable for cleaning and parts replacement.

All plugs have:

  • A central spindle/shaft on which two plates are fitted with a natural rubber tire (ring) between them, a wing nut on the shaft moving the two plates together compressing the tire and making the seal in the pipe or orifice.
  • Natural rubber tires which can be substituted for different rubbers where additional chemical and/or heat resistance is required.
  • Alternative rubber rings options are: Silicone, Nitrile & Viton)

COB Advantages:

  • Quality, Lightweight, Durable Nylon 20% lighter than metal.
  • Tough/shatter-proof and easily cleaned and maintained, corrosion resistant.
  • Plaster or cement do not adhere to the plug.
  • Friction-reducing acetyl copolymer thrust washer inserted between plate and wing nut provides for easy expansion.
  • Natural Rubber provides "superior" seal.
  • Larger sizes incorporate strengthening ribs to provide rigidity in use.
  • Silicon, nitrile, and viton seals available


 
 

Solid Stem Nylon Plugs

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solid stem nylon plugs
Solid Stem / SS-0.50" to 1.50"
Item Number    Nominal Size    Size Unexpanded Size Expanded Unit Weight (LBS.)
COB.SS0.50 0.50" 0.490" 0.600" 1/4
COB.SS0.75 0.75" 0.740" 0.900" 1/4
COB.SS1.00 1.00" 0.975" 1.200" 1/4
COB.SS1.25 1.25" 1.225" 1.450" 1/4
COB.SS1.50 1.50" 1.480" 1.750" 1/4

 

 
 

Vented Stem Nylon Plugs

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vented stem nylon plugs
HOLLOW STEM / VS-0.50" TO 6"
Item Number    Nominal Size     Size Unexpanded    Size Expanded    Unit Weight (LBS.)
COB.VS0.50 0.50" 0.490" 0.600" 1/4
COB.VS0.75 0.75" 0.740" 0.900" 1/4
COB.VS1.00 1.00" 0.975" 1.200" 1/4
COB.VS1.25 1.25" 1.225" 1.450" 1/4
COB.VS1.50 1.50" 1.420" 1.930" 1/4
COB.VS2.00 2.00" 1.930" 2.360" 1/4
COB.VS2.50 2.50" 2.400" 2.760" 1/4
COB.VS3.00 3.00" 2.870" 3.310" 1/3
COB.VS4.00 4.00" 3.540" 4.250" 1/2
COB.VS5.00 5.00" 4.720" 5.370" 1
COB.VS6.00 6.00" 5.500" 6.290" 1

 

 

 

link to pipe plug index page

Trademarks are the properties of their respective owner(s).

December 2022, January 2022, Feb 2021, February 2010, November 2009 CSS, March 2004

The descriptions, illustrations, specifications, dimensions, and part numbers are subject to change without notice.


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