Page 33 - Tyco-Grooved-Fire-Protection-Products-Installation-Handbook

INSTALLATION INSTRUCTIONS 31
Figure 716 Flexible Reducing 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.
Reducing Couplings are not recommended for applications below 40°F (4°C).
Installation/Assembly Instructions
The following instructions apply to Figure 716 Flexible Reducing 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.
The sealing edges and outer surfaces of the gasket should be covered with a fine layer of petroleum-free lubricant or equivalent. To prevent deterioration of the gasket mate- rial a petroleum lubricant should not be used on Grade “E” “EPDM” gaskets. For assem- bly below 40°F (4°C) a petroleum-free silicone lubricant must be used to prevent freezing of the lubricant.
Step 3. Install the gasket by placing the gasket over the pipe which has the larger diameter. Bring the smaller pipe end into alignment and slide the pipe into position. Slide the gasket into position, properly centering it between the grooved portions of each pipe.
NOTE
The gasket should not protrude into the grooves on either pipe segment.