SEAL RESPONSIBLY
SEAL RESPONSIBLY
NSF 61 GASKETS
NAM 37C Compressed Fiber Gasketing
Call Us
(210) 370-7990
Call Us
(210) 370-7990
Email Us
info@ogsupply.com
Hours
Mon-Fri: 9am-6pm
Location
Corporate Office & Production Facility
1150 Guadalupe Dr.
Cibolo, TX 78108
Material Composition & Application
Made from aramid fiber, mineral fiber & inorganic fillers NAM-37C is a premium quality gasket designed for specific use for sealing water treatment equipment and distribution systems required to comply with NSF/ANSI 61: Drinking Water System Components – Health Effects by most governmental agencies that regulate drinking water supplies.
NAM-37C is also suitable for steam, oil, mild alkalis and acids, hydrocarbons and solvents making it an excellent multipurpose gasket.
Available in:
• Thickness ⅟₆₄˝ to ¼˝
• Gaskets – Raised Face, Full Face and Specials
• Color – Green
Material Composition & Application
Made from aramid fiber, mineral fiber & inorganic fillers NAM-37C is a premium quality gasket designed for specific use for sealing water treatment equipment and distribution systems required to comply with NSF/ANSI 61: Drinking Water System Components – Health Effects by most governmental agencies that regulate drinking water supplies.
NAM-37C is also suitable for steam, oil, mild alkalis and acids, hydrocarbons and solvents making it an excellent multipurpose gasket.
Available in:
• Thickness ⅟₆₄˝ to ¼˝
• Gaskets – Raised Face, Full Face and Specials
• Color – Green
NSF 61 Gaskets
Quality and service you can trust.
Since 1948 O.G. Supply, LLC. has built a solid reputation around the world as an innovative sealing solution provider to the waterworks industry. We have worked with leading material manufacturers’ to develop competitively priced gasket sheeting certified to NSF-61 for assurance of safe drinking water. While gasket production is our business, responsible sealing is everyone’s business. Please consult with our staff to help you select the best product for your potable water application.
NAM 37C Compressed Fiber Gasketing
PROPERTIES (Test Specimen Thickness 2.0mm) |
TEST METHOD |
UNIT | SPECIFIED VALUE |
Density | — | gm / cm^3 | 1.70 – 2.10 |
Tensile Strength | — | ||
(a) ACC to ASTM F152 (Across Grain) | N / mm² | 8 Min. | |
(b) ACC to DIN52910 (Across Grain) | N / mm² | 5 Min. | |
Compressibility | ASTM F36A | % | 5-15 |
Recovery | ASTM F36A | % | > 50 |
Fluid Absorption | |||
(a) In ASTM Oil No. 3 | ASTM F 146 | ||
INCREASE in Mass | % | < 15 | |
INCREASE in Thickness | % | < 10 | |
(b) In Fuel B | ASTM F 146 | ||
INCREASE in Mass | % | < 10 | |
INCREASE in Thickness | % | < 10 | |
(c) In Water/Antifreeze | ASTM F 146 | ||
INCREASE in Mass | % | < 15 | |
INCREASE in Thickness | % | < 15 | |
Ignition Loss | DIN 52911 | % | < 30 |
Dielectric Strength | ASTM D149 | KV/MM | 8.3 |
Surface Area Volume Ratio | NSF/ANSI 61 | SQ. IN./L | 2.0 |
Compare NAM 37C to competitive NSF-61 Certified compressed fiber gasketing: Garlock®-3760U, Durlon®-7910, Thermoseal®-WaterSIL, Teadit®-1082SAN

NAM 37C Compressed Fiber Gasketing
NSF-61 Certified ARAMID/NBR (GREEN)
Peak Temperature: 572°F (300°C)
Continuous Temperature: 428°F (220°C)
Continuous Temperature: 320°F (160°C)
with steam
Operating Pressure: 1137 PSI (80 Kg / cm²)
M Value: 2.5 (N/mm²)
Y Value: 25 (N/mm²)
The m = maintenance factor which provides the additional pre-load needed in the flange fasteners to maintain the compressive load on gasket after internal pressure applied to a joint. The y= minimum design seating stress on the contact area of the gasket that is required to provide a seal at an internal pressure of 0.14 bar Y=W/A1, where W is total fastener force in N and A1 is gasket area in mm².
ASTM Line Callout
F104F712122A9B4E12M4
NSF Certificate Number
C0104662
NO MORE GUESSING – NO MORE MEASURING
Each gasket clearly marked with:
– NSF-61 Certification
– Flange Size
– Pressure Class

NSF 61 Gaskets
Quality and service you can trust.
Since 1948 O.G. Supply, LLC. has built a solid reputation around the world as an innovative sealing solution provider to the waterworks industry. We have worked with leading material manufacturers’ to develop competitively priced gasket sheeting certified to NSF-61 for assurance of safe drinking water. While gasket production is our business, responsible sealing is everyone’s business. Please consult with our staff to help you select the best product for your potable water application.

NAM 37C Compressed Fiber Gasketing
NSF-61 Certified ARAMID/NBR (GREEN)
Peak Temperature: 572°F (300°C)
Continuous Temperature: 428°F (220°C)
Continuous Temperature: 320°F (160°C)
with steam
Operating Pressure: 1137 PSI (80 Kg / cm²)
M Value: 2.5 (N/mm²)
Y Value: 25 (N/mm²)
The m = maintenance factor which provides the additional pre-load needed in the flange fasteners to maintain the compressive load on gasket after internal pressure applied to a joint. The y= minimum design seating stress on the contact area of the gasket that is required to provide a seal at an internal pressure of 0.14 bar Y=W/A1, where W is total fastener force in N and A1 is gasket area in mm².
ASTM Line Callout
F104F712122A9B4E12M4
NSF Certificate Number
C0104662
NO MORE GUESSING – NO MORE MEASURING
Each gasket clearly marked with:
– NSF-61 Certification
– Flange Size
– Pressure Class
