Page 27 - Mechanical Products Installation Handbook IH-1000M

INSTALLATION INSTRUCTIONS 19 Couplings
Rigid and Flexible (2 to 12 Inch)
Step 4. Insert the other bolt and nut into the coupling and rotate both nuts until finger tight. Verify that the bolt heads are fully recessed in the housing.
Step 5. Alternate between bolts when tighten- ing nuts until properly tightened.
Note: Always tighten the nut and bolt set evenly. Uneven tightening can cause the gasket to pinch or bind.
When setting the torque on power impact wrenches, always refer to the manufactur- er's recommended bolt torque specifications. Failure to use the manufacturer's settings and abide by manufacturer instructions may result in loss of warranty protection, invalidate listing certifications and/or cause personal injury or property damage.
• For Flexible Couplings Only
Figures 705, 707, and 405 Coupling Housing bolt pads must be in metal to metal contact. For Flexible Coupling deflection data refer to individual tech data sheets.
• For Rigid Couplings Only
Figure 772, 774, 770, 672, and 472 Rigid Cou- plings have an intended gap of up to 1/16 of an inch at each pad to allow for positive rigid gripping onto the pipe. The patented tongue and groove design provides protection to the back of the gasket during installation.
Step 4.
Step 5.