Torque Values for Bonnets of Mark VIII® Shutoff & Regulating Valves

  1. The following torque values are to be used for assembling the valves given.
  2. The values shown are for dry assembly. If lubrication is used on the threads, it is recommended that torques closer to the minimum be used.
  3. The minimum values establish the lower limit for permanent assembly. Torque values below the minimum should not be used. Torque values larger than the maximum are not recommended without prior approval.
Mark VIII® Valve Bonnet Torque
Size In.-Lbs.
Min. Max.
8-04 [.156″ ORIF] 30 60
8-08 [.297″ ORIF] 70 150