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Typical Valve Break Torque Figures



The "Break Torque" of a Ball Valve is the value of force required to move the Ball from either the fully open or closed position (Break Torque). The most common way of presenting this information in Europe is in Newton Metres (Nm). The greater the force required, the higher the Torque value becomes.

The figures given below are based on PTFE/TFM 1600 Seat Materials being used on Clean, Cold Water at 10 bar/g differential pressure. For higher working pressures, please consult our sales department. An additional value of 15% is required when fitting reinforced materials. A "Safety Factor" of between 25% - 30% at least is recommended when sizing Actuators.

*Based on TFM 1600 + 25% Carbon Filled standard factory fitted seat
Fig / Size 0.25" 0.38" 0.5" 0.75" 1" 1.25" 1.5" 2" 2.5" 3" 4" 5" 6"
NTC KV-L20 4.5 4.5 5 6 10 13 19 29 45 72 110
NTC KV-L30 4.5 4.5 5 6 10 13 19 29 45 72 110
NTC KV-L31 4.5 4.5 5 6 10 13 19 29 45 72 110
NTC KV-L32 4.5 4.5 5 6 10 13 19 29 45 72 110
NTC KV-L80F* 6 6 6 7 12 15 22 33
NTC KV-L81F* 6 6 6 7 12 15 22 33
NTC KV-L82F* 6 6 6 7 12 15 22 33
NTC KV-L61 5 6 10 13 19 29 45 72 110 209 306
NTC KV-L61/E 29 45 72 110
NTC KV-L6N 5 6 10 13 19 29 45 72 110 209 306
NTC KV062 5 6 10 13 19 29 45 72 110 209 306
NTC KV-L6K 5 6 10 13 19 29 45 72 110 209 306
NTC KV-1MF 10 19 29 45 72 110
NTC KV-L9C/B 6 8 14 22 32 50 75 115
NTC KV-L91/B 6 8 14 22 32 50 75 115
NTC KV-L50 6 6 6 9 12 15 22 33
NTC KV-L51 6 6 6 9 12 15 22 33