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Multipliers for Operating Conditions
The above torque values are based on ideal conditions. The following operating conditions can further increase torque and should be considered for safe sizing of actuators.
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| |
Multiplier |
| High viscosity or light solids |
1.3 |
| Infrequently operated valves |
1.1 |
| Temperature above 200 deg F |
1.1 |
| Temperature below 0 deg F |
1.1 |
| Abrasive, crystalizing or sludge |
1.6 |
| Ryton®, glass filled TFE sleeve |
1.5 |
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If more than one condition exists, use more than one multiplier.
Example: RYTON® SLEEVE ABRASIVE SERVICE = 1.6 X 1.5 X torque value.
® Ryton is the registered trademark of Philips Petroleum Co.
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