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  • 4g-nitrile concrete pipe gasket

4G Nitrile Pipe Gaskets

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

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The Type 4G Nitrile gaskets were developed to specifically meet the needs of contemporary concrete pipe joint designs, while providing the ability to resist common underground contaminants.

How It Works

  • The gasket is stretched over the spigot.
  • The gasket is equalized around the entire circumference of the spigot.
  • Bell joint is covered liberally with lubricant.
  • Bell and spigot are homed creating a watertight seal.

Why It's Better

  • Optimized profile designs for a variety of joint configurations.
  • Accurate profile designs covering a variety of underground contaminant applications.
  • Simple installation methods.

Where To Use

  • Convenience Stores
  • Petroleum Storage Terminals
  • Pipeline Terminals
  • Refineries
  • Auto Dealerships
  • Car/Truck Washes
  • Airport Ramps or Deicing Facilities
  • Manholes
  • Wet wells
  • Pumps and lift stations

Please Note

Nitrile pipe gaskets are non-stock items and take 4-8 weeks lead time for production.

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.

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%

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.

When installing 4G Nitrile Pipe Gaskets, you can follow our regular installation instructions or our box culvert installation instructions. The instructions above refer more to the inherent properties and considerations that must be taken into account when installing.

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