Page 343 - Mechanical Products Installation Handbook IH-1000M

GASKETS 335 Gaskets are provided in Grade “E”, “EN” and “EHT” EPDM, Grade “T”
Nitrile, Grade “O” Fluoroelastomer, and Grade “L” Silicone.
The gasket recommendation tables have been developed to assure maximum service life. These tables have been developed from informa- tion supplied by the material manufacturers of the elastomer, technical reference literature and testing conducted by GRINNELL Mechanical Products.
In evaluating the gasket grade for intended service applications, the following considerations must be reviewed:
• System operating temperature
• Fluid or solution type and concentration • Duration of service
Technical and engineering services should be consulted if combina- tions of service solutions are being considered. Contact GRINNELL Mechanical Products for recommendations for services not listed.
NOTICE
Rigid couplings are recommended for vacuum and low temperature applications. All gasket recommendations are based on a temperature of 70°F (21°C) unless otherwise noted.
To prevent deterioration of the gasket material a petroleum lubricant should never be used on Grade “E” “EPDM”, Grade “EHT” “EPDM” or Grade “L” Silicone gaskets. For applications, below 40°F (4°C) Tri-Seal gaskets are recommended with a petroleum-free silicone lubricant.
Proper pipe end preparation and grooving is mandatory to prevent leakage (See specifications for cut and roll grooving). The gasket seal surface must be free from score marks, ridges, indentations, projec- tions, loose paint, flaking galvanizing, scale, dirt chips, grease, or rust that would prevent a positive seal.
Gasket recommendations apply to GRINNELL gaskets and valves only.
• Specify gasket grade when ordering.
• For vacuum or low temperature systems, use Tri-Seal gaskets. Use a petroleum-free silicone lubricant.
• Check gasket color code to be certain it is recommended for the ser- vice intended.
• Unless otherwise noted, all gasket listings are based upon a temperature of 70°F (21°C).
• Where more than one gasket is shown, the preferred gasket grade is listed first.
• For services not listed, contact GRINNELL Mechanical Products for recommendation.
• Gaskets for fire protection services are provided in Pre-lubricated Grade “A” EPDM, Grade “E” EPDM, or Tri-Seal Grade “E” EPDM.
Gasket Descriptions
• Refer to Technical Data Sheet G610 Gaskets.