Flange Bolt Torque Recommendations for Magnatrol Valves

Bolt Size Hex Head Size Valves Size(s) Torque (ft. / lbs.)
Bronze Valves
Torque (ft. / lbs.)
Stainless Valves
1/4" - 20 7/16" All "M" & "MR" Valves 5 N/A
5/16" - 18 1/2" 1/2" & 3/4" 10 12
3/8" - 16 9/16" 1" & 1-1/4" 15 20
7/16" - 14/td> 5/8" 1-1/2" & 2" 20 32
1/2" - 13 3/4" 2-1/2" & 3" 30 40