Tank Car Manway Nozzle Gasket
Technical Bulletin
Salco Products Inc.
1385 101st St., Suite A Lemont, IL 60439 ph 630-783-2570
www.salcoproducts.com
•
22311 Hufsmith-Kohrville Rd. Tomball, TX 77375 ph 281-351-0274
R:10/14
Manway Nozzle Gasket
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Independently tested and proven to provide greater overall compression as well as a more uniform seal about the manway nozzle.*
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Available in 18”, 20”, and 24” sizes.
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Available in Viton, EPDM, FDA Nitrile and Butyl. n
Can be used in place of manway cover gaskets.
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Easy, glue-free installation allows for simple cleaning or replacement.
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Long inner leg secures to the manway nozzle, holding the gasket in place.
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Securement tabs provide a means to secure gasket to manway using cable.
*For complete gasket testing documentation, including FEA results, please contact your Salco Products Representative.
Designed to AAR specifications, tested and accepted for multiple applications
Test Results:
1 tonne
One tonne of force applied to the gasket fully compressed equates to approximately 1764 PSI (average
across entire contact area), with approximately 2200 PSI across the peaks of the gasket chevrons.
Within 5 cycles of 1 tonne, no damaging failures were observed, gasket height was permanently
compressed (deformed) by 1% of original height. Gasket is still acceptable for service.
Within 10 cycles of 1 tonne, no damaging failures were observed, gasket height was permanently
compressed (deformed) by 8% of original height. Gasket is still acceptable for service.
Within 20 cycles of 1 tonne, no damaging failures were observed, gasket height was permanently
compressed (deformed) by 13% of original height. Gasket is still capable of sealing, however a
replacement is recommended.
Salco Products Inc.
1385 101st St., Suite A Lemont, IL 60439 ph 630-783-2570
www.salcoproducts.com
•
22311 Hufsmith-Kohrville Rd. Tomball, TX 77375 ph 281-351-0274
Installation Instructions For:
18”, 20”, and 24” Manway Nozzle Gaskets
1.
2.
3.
4.
5.
6.
7.
8.
Clean and inspect manway cover groove and top of manway nozzle per
MSRP-C-III Appendix D Section 6.
Place the gasket on top of the nozzle. Make sure the gasket covers the nozzle uniformly.
Inspect bolts per MSRP-C-III Appendix D Section 6.4.
Tighten all nuts finger tight.
Torque all nuts to 30-40 ft-lbs in the proper torque sequence.
In a second pass around the cover, torque all nuts to 60-70 ft-lbs in the proper torque sequence.
In a final pass, tighten all nuts to 100-110 ft-lbs in the proper torque sequence.
Use rotational tightening and reverse rotational tightening until stable.
This procedure applies to all SALCO elastomeric nozzle gaskets. Other gasket materials and
configurations of gaskets may require more or less torque. In case of leaks during a pressure
test, go to Step 7 and 8, but proceed to 120-125 ft-lbs. If leaks still occur, unbolt the cover
and check the gasket groove, nozzle gasket and nozzle.
Note:
Torque values were calculated using new A307 Grade B eyebolts,
A194 Grade 2H hex nuts, washers and thread lubricant.
Additional bolts that can also use these values:
ASTM A193 Class 1: Grade B8, B8C and B8M
ASTM A307 Grade A
ASTM A320 Class 1: Grade B8, B8C, B8F, B8M and B8T
These values are approximations. Please contact Salco Engineering for more detailed torque recommendations.
Bolt Tightening Sequences
6
4
1
4
6
8
Bolt
2
3
5
4
1
6
Hinge
8
Hinge
Bolt
5
2
7
3
8
10
6
1
10
Bolt
Hinge 2
5
7
3
9
Corporate Vision Statement
Salco Products will endeavor to continually enhance an environment of trust and confidence among customers,
vendors, and employees through a commitment to innovation, quality products and services, and proficient
response to the needs of the industries we serve.
Locations
Lemont, IL
Tomball, TX
For more information call customer service at: (630) 685-4661