Flowserve 1878 Swing Check Valve - Manual (Page 10)

1878 Swing Check Valves FCD ADENIM0006-00
10
11.0 Bolting Torque Values
At intervals of not more than six months, check the tightness of all bolting. Bolted bonnet valves should have the body-bonnet
bolting torqued to the values shown below:
STUD SIZE SA193-B7 SA453-660
Nominal Maximum Nominal Maximum
5/8-11 59 90 50 100
3/4-10 104 165 88 175
All torque values are in ft-lbs.
NOTE: The above table provides nominal design torque values and maximum torque values using an assumed friction coefficient
of 0.2. The maximum torque values provide for material conditions such as rust and oxides that exist after equipment is in
service.