Page 34 - Tyco-Grooved-Fire-Protection-Products-Installation-Handbook

32 INSTALLATION INSTRUCTIONS
Figure 716 Flexible Reducing Couplings 2 of 2
Step 4. With both bolts removed, place the coupling housings over the gasket. Verify that the housings are over the gasket and that the housing keys are fully engaged into the pipe grooves.
Step 5. Insert the bolts into the coupling and rotate the nuts until finger tight. Verify that the bolt heads are fully recessed in the housing.
Step 6. Tighten nuts uniformly to the recom- mended bolt torque.
NOTES
Uneven tightening can cause the gasket to pinch or bind. For proper bolt torques refer to Page 51. Bolt torque information has been pro- vided in accordance with the UL 213 “Standard For Rubber Gasketed Fittings For Fire Protec- tion Service” (Refer to Page 12).
Figure 716 Coupling Housings bolt pads must be in metal to metal contact.
Use an optional Type 304 stainless steel metal insert to prevent pipe tele- scoping when installed in the vertical position. Place the insert inside the gasket, align the insert slots with the ribs on the gasket.
Refer to Technical Data Sheet TFP1830 for more information.