An increment should be added to the identified valve torque for safe when select the pattern of the pneumatic actuator. For vapor or non-lubricant liquor medium, the increment should be up to 25% of the valve torque, 30% f non-lubricant pasting liquor medium, 40% for non-lubricant dry air medium, 60% for non-lubricant particle medit delivered be air and 20% for lubricating clean medium with low friction respectively.(the safe increment above is recommended in theory for reference)

Pattern Selection of the Actuator