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The Jock™ O-Ring Sealing Gasket
 By Georg Fischer Central Plastics Company

Problems solved by Jock O-Ring Sealing Gaskets

The Problem:

Leaking Flanges.

The Solution:

Use high energy O-ring elastomers which maintain constant sealing force. This sealing element encapsulation prevents gasket blowout, and the high quality retainer and seal materials eliminate fluid permeation.

The Result:

Positive Seals and Zero Environmental Leakage.

The Reason:

Jock O-Ring Gaskets.

 

The Problem:

Catastrophic Fire Failure.

The Solution:

Attain complete contact of flange and retainer permitting only micro-exposure of seals to service fluid and environment.

The Result:

PLongest Fire Life of any Insulating Gasket.

The Reason:

Jock O-Ring Gaskets.

 

The Problem:

High Maintenance and Installation Costs.

The Solution

Achieve a positive seal utilizing the elastic memory of the confined seal. This insures zero ASME "M" and "Y" factors, producing reliable seals without tremendous bolt loads. Undamaged insulating washers mean fewer shorts.

The Result:

Fewer Service Calls due to leaking and shorting flanges.

The Reason:

Jock O-Ring Gaskets.

 

The Problem:

Mismatched, Misaligned, and damaged RTJ Flanges.

The solution:

Use a narrow self-energized seal capable of withstanding high fluid pressure.

The Result:

Maintenance Versatility and Positive Sealing in difficult situations.

The Reason:

Jock O-Ring

Overcoming Mismatching & Misaligning Problems



 

Closeup of Type "E" & Type "F" Sealing Gaskets


Gasket Material Specifications

Pipe Size Pressure Retainer Material, Insulating Sealing Elements

All standard sizes 1/2" and larger are stock items.

All ANSI, DIN and API rated flanges are stock items.

Phenolic
(standard)
225oF (107oC)

Buna-N
-60oF to +250oF

Odd sizes and shapes are available on special order with short delivery time.

Pressures from hard vacuum to 50,000 psi and higher.

Phenolic
(high temp.)
350oF (177oC)

Viton®
-40oF to +450oF

Viton® is a registered trademark of DuPont Dow Elastomers.

Sleeve & Washer Material Specifications

Sleeve Material Washer Material

Polyethylene: 180oF (80oC)
1-piece sleeve & washer: 250oF (121oC)
Phenolic: 250oF (121oC)
Mylar: 300oF (149oC)
High temp. sleeve: 450oF (232oC)

Phenolic: 250oF (121oC)
1-piece sleeve & washer: 250oF (121oC)
High temp. sleeve: 450oF (232oC)
Glass phenolic: 350oF (177oC)

How to Order

To order a flange insulation kit, please indicate the following:

  1. Quantity
  2. Pipe size (nominal)
  3. Pressure rating (ANSI, DIN, API)
  4. Gasket type (E or F)
  5. Retainer material
  6. Sealing Element
  7. Single or double washer sets (SW or DW)
  8. Sleeve material


  

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