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1. What are the three main factors to consider when selecting an actuator? 1) The actuator’s output must exceed the valve's load and be appropriately matched. 2) When checking standard combinations, ensure that the allowable pressure differential specified for the valve meets process requirements. For high pressure differentials, calculate the unbalanced forces on the valve core. 3) Consider wheth...
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Introduction Globe valves are among the most commonly used isolation valves in industrial piping systems and are widely applied in the oil and gas, chemical processing, power generation, and water treatment industries. Although their design is relatively straightforward, incorrect installation with the flow direction reversed remains a common field issue. Many operational problems&md...
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Yes, a butterfly valve can control flow and may remain partly open, but only when the valve, actuator and operating range have been selected for throttling service. A line-size on-off butterfly valve held near the closed position can suffer poor control, cavitation, noise, vibration and concentrated seat or disc erosion. Partial opening is not inherently harmful; operating at the wrong opening for...
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