NIBCO Check Valve Automatic Stop F869B - Manual (Page 8)

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IRON VALVE BOLT TORQUE
Before tightening, make sure all surfaces that the fastener will contact are clean and dry.
The torque tightening table listed below applies to clean, undamaged, well lubricated threaded
fasteners. When tightening, use the sequence chart below. Tighten in two steps.
When tightening, use the sequence chart below. Tighten in two steps.
1. Tighten fastener using about 1/2 the final torque figure.
2. Final tighten using the full torque figure. ASTM A307 steel only.
Fastener Size 7/16 1/2 9/16 5/8 3/4 7/8 1 1-1/8 1-1/4 1-3/8 1-1/2
Torque in Ft. Lbs. 30 45 66 93 150 202 300 474 659 884 1057
BOLT TIGHTENING SEQUENCE