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Durlon® 7910 NSF/ANSI 61

Compressed Non-Asbestos Gasket Material

Certified to NSF/ANSI 61
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APPLICATION

Durlon® 7910 is a good quality general service gasket for applications where an NSF/ANSI 61 Certified gasket material is required. It is suitable for potable water, steam, oil, water, mild alkalis and acids, hydrocarbons and solvents; and for applications in the water treatment and reclamation, wastewater and plumbing industries.

COMPOSITION

Durlon® 7910 is a compressed fiber sheet gasket material that was specially developed to meet the requirement of NSF/ANSI 61 for potable water applications. It contains high strength mineral fibers bonded with nitrile (NBR) synthetic rubber.

typical properties

Color: White, branded 
Density: 106 lbs/ft3 (1.7 g/cm3)
Tensile strength across grain, ASTM F152:  1,600 psi (11 MPa)
Compressibility @ 5000 psi, ASTM F36: 9 to 20%
Recovery ASTM F36: 40%
Creep Relaxation, ASTM F38: 25%
Short Term Maximum Temperature: 700ºF (371ºC)
Continuous Operating Temperature: -100 to 500ºF (-73 to 260ºC)
Pressure, max:
(at ambient temperature)
1200 psig (83 bar)

Fluid Resistance:

ASTM F146 
IRM 903 Oil 5h/300°F (149°C)
Thickness Increase:
Weight Increase:

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

 

 

 0 to 15% 
 15% Maximum 


 0 to 10% 
 12% Maximum

Weight Increase: 12% Maximum
Sealability
ASTM F37 (Nitrogen):
ASTM F2378 Gas Permeability:

0.5 ml/hr
10x
Flexibility, ASTM F147: 10x
ASTM F104: F712120-A9B3E22K5L151M5

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.


certification

NSF/ANSI 61 Potable Water at room temperature, 73ºF (23ºC).
NSF/ANSI 61 Potable Water “Commercial Hot”, 179ºF (82ºC).

available sheet sizes

Nominal Thickness Sheet Sizes (inches) Order Code Durlon® 7910 Sheets Per Roll Approx. Wt/Sheet lbs
1/64" 60 x 63
60 x 126
NS05-060-063
NS05-060-126
20
10
4
8
1/32" 60 x 63
60 x 126
NS08-060-063
NS08-060-126
20
10
7
14
1/16" 60 x 63
60 x 126
120 x 126
NS15-060-063
NS15-060-126
NS15-120-126
10
5
2
15
29
58

1/8"

60 x 63
60 x 126
120 x 126
NS30-060-063
NS30-060-126
NS30-120-126
8
4
1
28
56
112

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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.