Page 31 - Tyco-Grooved-Fire-Protection-Products-Installation-Handbook
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 Figure 705 & 707 Flexible Coupling 1 of 2 NOTICE
 Always read and understand the instructions. Never remove any piping component without verifying that the system is depressurized and drained.
Rigid Couplings with Tri-Seal gaskets are recommended for applications below 40°F (4°C).
Installation/Assembly Instructions
The following instructions apply to Figure 705 and 707 Flexible Cou- plings. The installation is based on pipe grooved in accordance with Standard Cut Groove or Roll Groove Specifications. Refer to Technical Data Sheet TFP1898 for more information.
Step 1. Inspect exterior groove and ends of the pipe to verify all burrs, loose debris, dirt, chips, paint and any other foreign material such as grease are removed. Pipe end sealing surfaces of the pipe ends must be free from sharp edges, projections, indentations, and/or other defects.
Step 2. Verify that the coupling and gasket grade are correct for the application intended. Refer to Technical Data Sheet TFP1895 for additional gasket information.
Grade “A” gaskets are supplied as standard with a pre-lubricant and do not require addi- tional lubrication. Grade “E” Tri-Seal gaskets are recommended for freezer applications. NOTE
Silicone lubricant must be used in dry pipe and freezer applications.
If the gasket does not have a pre-lubricant, the edges and outer sur- faces of the gasket should be covered with a fine layer of petroleum-free lubricant or equivalent. To prevent deterioration of the gasket material a petroleum lubricant should not be used on Grade “A” “EPDM” or Grade “E” “EPDM” gaskets.
Step 3. Install the gasket by placing the gasket over the pipe, which is to be fastened by the flexible coupling and ensure that the gasket lip does not extend beyond the end of the pipe.

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