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  • 4g-nitrile concrete pipe gasket

4G Nitrile Pipe Gaskets

This nitrile connector meets or exceeds:

  • ASTM C 1619 Class D for Oil-Resistant Gaskets
  • ASTM C443-04 for Oil-Resistant Gaskets
  • CSA 257.3-03 for Oil-Resistant Gaskets

Download Literature

 

Nitrile 4G Gaskets are high-performance gaskets for concrete pipe which combine watertight sealing performance with the ability to resist common underground contaminants.

Features and Benefits

  • Rubber compounds were developed specifically for concrete pipe sealing
  • Each profile design has been analyzed and optimized for a specific joint configuration
  • Automated processing equipment eliminates variability in sizing
  • Extrusion process is laser-controlled for precise, consistent sizing>

Typical Applications
NITRILE 4G offers hydrocarbon resistance for applications where there are (known, suspected, or potential) contaminated soils or effluent streams, such as:

  • Service Stations
  • Convenience Stores
  • Petroleum Storage Terminals
  • Pipeline Terminals
  • Refineries
  • Auto Dealerships
  • Truckstops
  • Car/Truck Washes
  • Airport Ramps or Deicing Facilities
  • Other areas where risk of contamination
    requires preventive engineering

In addition to resistance to common hydrocarbons, NITRILE 4G also offers improved resistance to mixed contaminated chemistries. This is especially important where contaminants and their concentrations cannot be accurately predicted or determined. This can result in interactions among the contaminants which are difficult to anticipate and define.

How They Work
Nitrile 4G Gaskets are manufactured from a custom-blended rubber compound which uses a syntheticrubber copolymer of acrylonitrile (ACN) and butadiene. The resulting synthetic rubber polymer, NBR (nitrile-butadiene rubber), is blended with other ingredients to create a thermoset rubber which is highly resistant to a variety of petroleum-based fluids, as well as many mixed chemistries.

TEST REQUIREMENTS and RESULTS for NITRILE 4G GASKETS as in
ASTM C1619 Class D, and ASTM C 443-04 and CSA 257.3-03 for Oil-Resistant Gaskets
TestASTM Test MethodTest RequirementsTypical Result
TENSILE STRENGTHD 412 1200 PSI, MIN.1403 PSI
ELONGATION AT
BREAK
D 412 350%, MIN.563%
HARDNESSD 2240 (SHORE A
DUROMETER)
±5 FROM THE
MANUFACTURER’S
SPECIFIED HARDNESS
<2
ACCELERATED
OVEN-AGING
D 573, 70± 1ºC
FOR 7 DAYS
DECREASE OF 15%,
MAX. OF ORIGINAL TENSILE
STRENGTH, DECREASE
OF 20%, MAX.
OF ELONGATION
-3% TENSILE
CHANGE, -10%
ELONGATION
CHANGE
COMPRESSION TESTD 395, METHOD
B, AT 70ºC FOR 22
HRS
DECREASE OF 25%,
MAX. OF ORIGINAL DEFLECTION
10%
WATER ABSORPTION
D 471 IMMERSE
0.75 BY 2-IN.
SPECIMEN IN
DISTILLED WATER
AT 70ºC FOR 48 hrs
INCREASE OF 10%,
MAX. OR ORIGINAL BY
WEIGHT
2.70%
OZONE RESISTANCED 1171RATING 0PASS
LOW-TEMP,
BRITTLE POINT
D 746NO FRACTURE AT -40ºCPASS
OIL RESISTANCE
D 471; ASTM IRM
9
D 471; ASTM IRM
903 AT 100ºC FOR
70HRS
80% MAX VOL. CHANGE-1.9%
Download Specifications

 

An oil-resistant watertight rubber gasket shall be employed in the connections of concrete pipe for sanitary, stormwater, drainage, or other applications where contaminants are known or suspected.

The gasket shall be NITRILE 4G as manufactured by Press-Seal Corporation, Fort Wayne, Indiana, or approved equal.

The gasket shall be the sole element relied on to assure a flexible watertight seal between pipe connections. The gasket shall consist of a single wedge-shaped rubber element. The rubber compound used shall consist of synthetic nitrile butadiene rubber polymer and shall conform with the sealing and oil resistance requirements of ASTM C1619, Class D, ASTM C 443-04 for Oil-Resistant Gaskets, and CSA 257.3-03 for Oil-Resistant Gaskets.

Each gasket shall be individually identified with continuous blue or green stripe toward the leading edge of the gasket. This stripe shall be used to positively identify that the gasket is NITRILE 4G and to confirm its proper orientation on the spigot of the pipe.

Selection of the proper size gasket for the pipe requirement, and installation thereof, shall be in strict conformance with the recommendations of the gasket manufacturer. Any testing also shall be conducted in strict conformance with the requirements of the gasket manufacturer.

NITRILE 4G
PROFILE
GASKET
SPACE
158-4G0.326 (8.3 mm)
210-4G0.446 (11.3 mm)
288-4G0.500 (12.7 mm)