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Durlon 8500® Gasketing Material

Aramid Inorganic Fiber w/ NBR Rubber Binder Compressed Gasket
Durlon 8500 Sheet Gasket Material

Application

Our workhorse material, Durlon® 8500 is excellent in steam, natural gas, soybean processing and with new generation refrigerants. A high quality general service gasket material for use in a wide range of services in pulp and paper, food, beverage, pharmaceutical, chemical, refinery, gas pipeline and general industry. Durlon® 8500 exhibits good compressibility and recovery, excellent sealability, flexibility and cutting characteristics.

Composition

Durlon® 8500 contains high-strength aramid and inorganic fibers bonded with high-grade Nitrile (NBR) rubber.

FIRE TESTING

Durlon® 8500 has successfully passed a modified version of the API 607 fire test. The duration of the direct flame portion of the test is 30 minutes and the flange temperature must reach 1200°F in the first 15 minutes. The internal pressure is held at a constant 30 psig. After the flame is shut off, the fixture is immediately water quenched with an overhead water blast. Leakage must not exceed 100 ml/min after a 6 minute cool down to successfully pass the test. Subsequent leakage testing is also performed.

Anti-Stick Properties

Much effort has gone into improving the anti-stick release agents of all compressed Durlon® products. All Durlon® compressed gasket materials have passed the MIL-G-24696B Navy Adhesion Test (366°F/48 hrs).

Typical Properties

Thickness 1/16"
Color: Green
Fiber: Aramid-Inorganic
Binder: NBR
Fluid Service: Saturated Steam, Oils, Dilute Acides & Alkalis, Hydrocarbons, Solvents
Temperature
      Min:
      Max:
      Max,continuous:

-100°F (-73°C)
700°F (371°C)
548°F (287°C)
Pressure: max, bar (psi) 103 (1,500)
Density: g/cc (lbs/ft3) 1.7 (106)
Compressibility, ASTM F36: 8 to 16%
Recovery ASTM F36: 50%
Creep Relaxation: 20%
Tensile Strength, ASTM F152: 2,000 psi (138 MPa)
Fluid Resistance - ASTM F146
IRM 903 oil, 5 h/300°F (149°C)

      Thickness Increase:
      Weight Increase:
ASTM Fuel B 5 h/70°F (21°C)
      Thickness Increase:
      Weight Increase:




0-15
150-10%
10%
Sealability:
ASTM F37 (Fuel A), ml/hr
ASTM F37 (Nitrogen, ml/hr
ASTM F 2378 (Nitrogen), cc/min

0.01
0.4
0.03
Volume Resistivity, Ohm-cm
ASTM D257

4.2 x 1013
Dielectric Breakdown, kV/mm
ASTM D149

11.7 (297)
Flexibility, ASTM F147: 10x

Note: ASTM properties based on 1/16" sheet thickness except ASTM F38, which is based on 1/32" sheet thickness. This is a general guide only and should not be the sole means of accepting or rejecting this material. The data listed here falls within the normal range of product properties but should not be used to establish specification limits nor used alone as the basis of design.

*For applications above Class 300, consult your representative.

M&Y and Proposed ASTM Gasket Constants

Thickness 1/16" 1/8"
M 2.7 4.2
Y psi (MPa) 2359 (16.3) 2931 (20.2)
Gasket Constants
Gb psi (MPa) 650 (4.5) 400 (2.8)
a 0.33 0.35
Gs psi (MPa) 200 (1.4) 20 (0.1)
*Gasket Constants based on proposed ASTM Draft 10.01

Available Sheet Sizes

Nominal Thickness Sheet Sizes Order Code Sheets per Roll Weight / Sheet lbs (kg)
1/64" (0.4 mm) 60 x 63
60 x 126
1524 x 1600
1254 x 3200
DG05-060-063
DG05-060-126
20
10
5 (2.3)
10 (4.5)
1/32" (0.8 mm) 60 x 63
60 x 126
1524 x 1600
1254 x 3200
DG08-060-063
DG08-060-126
20
10
8 (3.6)
16 (7.3)
1.0 mm 60 x 63
60 x 126
120 x 126
1524 x 1600
1254 x 3200
3048 x 3200
DG10-060-063
DG10-060-126
DG10-060-126
20
10
2
10 (4.5)
21 (9.5)
41 (18.6)
1/16" (1.5 mm) 60 x 63
60 x 126
120 x 126
1524 x 1600
1254 x 3200
3048 x 3200
DG15-060-063
DG15-060-126
DG15-060-126
10
5
2
16 (7.3)
31 (14.1)
62 (28.1)
2.0 mm 60 x 63
60 x 126
120 x 126
1524 x 1600
1254 x 3200
3048 x 3200
DG20-060-063
DG20-060-126
DG20-060-126
10
5
2
21 (9.5)
41 (18.6)
83 (37.6)
3/32" (2.5 mm) 60 x 63
60 x 126
1524 x 1600
1254 x 3200
DG25-060-063
DG25-060-126
8
4
26 (11.8)
52 (23.6)
1/8" (3.0 mm) 60 x 63
60 x 126
120 x 126
1524 x 1600
1254 x 3200
3048 x 3200
DG30-060-063
DG30-060-126
DG30-060-126
8
4
1
31 (14.1)
62 (28.1)
124 (56.2)

Note: Please inquire about availability of 4.0mm and 5.0mm thicknesses and other sizes not listed.

Warning: Durlon gasket materials should never be recommended when both the temperature and the pressure are at the maximums listed. Properties and applications shown are typical. No application should be undertaken by anyone without independent study and evaluation for suitability. Never use more than one gasket in one flange joint, and never reuse a gasket. Improper use or gasket selection could cause property damage and/or serious personal injury. The data reported is a compilation of field testing, field service reports and/or in-house testing. While the utmost care has gone into publishing the information contained herein, we assume no responsibility for errors. The information and specifications contained in this website are subject to change without notice. This revision cancels and obsoletes all previous editions.

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