Link-Seal Technical Information

Link-Seal Mechanical Seal Specification

Typical Specification 1.0 Penetration Seals

Use a mechanical seal, consisting of rubber links shaped to continuously fill the annular space between the pipe and the wall opening.

Link-Seal® pressure plates shall be molded of glass reinforced nylon. Hardware shall be 316 Stainless Steel, Per ASTM F593-95 Tensile Strength = 85,000 psi, average. Coloration shall be throughout elastomer for positive field inspection.

Each link shall have permanent identification of the size and manufacturer’s name molded into the pressure plate and sealing element.

The contractor will submit to verify the modular seals are domestically manufactured at a plant with a current ISO-9001:2000 registration.

Copy of ISO-9001:2000 registrations shall be a submittal item. PSI-Thunderline/ Link-Seal® as manufactured by Pipeline Seal & Insulator, Inc, Houston, TX, or pre-approved equal.

Link-Seal CAD Drawings

Click on the followings links to download the CAD Drawing that fits your requirements

When specifying Link-Seals with Century-Line Sleeves:

When specifying Link-Seals when Cored:

When specifying Link-Seals with a Steel Sleeve:

Technical Data

Material Properties of Link-Seal Modular Seal Elements
Hardness (shore A) D-2240 50 ±5 (40 ±5) 50 ±5 50 ±5
Tensile D-412 1450 psi 1300 psi 860 psi
Elongation D-412 400% 300% 250%
Compression Set S-395 15% 22 hrs @ 158ºF (70ºC) 45% 22 hrs @ 212ºF (100ºC) 40% 22 hrs @ 350ºF (177ºC)
Specific Gravity D-297 1.10 1.15 1.40
Material Properties of Composite Pressure Plates
Property Astm Method Value
Izod Impact – Notched D-256 2.05 ft-lb/in
Tensile Strength @ Yield D-638 20,000 psi
Tensile Strength – Break D-638 20,250 psi
Flexural Strength @ Yield D-790 30,750 psi
Flexural Modulus D-790 1,124,000 psi
Elongation, Break D-638 11.07%
Specific Gravity D-792 1.38
Moisture Content 0.18%
Bolt & Nut Specifications
Standard (Pacific Region):
Stainless Steel
ANSI Type = 316, Per ASTM F593-95 Tensile
Strength = 85,000 psi, average.


All products are warranted against failure caused by manufacturing defects for a period of one year. Any product found to be so defective and returned within one year from date of shipment will be replaced without charge. The above warranty is made in lieu of, and we disclaim, any and all other warranties, expressed or implied, including the warranties of merchantability and fitness for a particular purpose, and buyer agrees to accept the products without any such warranties. We hereby disclaim any obligation or liability for consequential damages, labor costs or any other claims or liabilities of any kind whatsoever.

Technical Assistance