How to Choose Power for the Motorized Valve?

Hello ,

Could any one advice me how to select the power of valve actuator whether 1 phase 230 V or 3 ph 400V

I have Motorized valve only ON/OFF required ( Gate valve type ) one on pipe DN 200and the other on pipe DN 80 !

Note : in our specs mentioned for quarter turn we must go with 110 V and mutli turn valve we must go with 400V !

Any helps please

The power ratings of the MOV depend on the design and process application needs.

Just contact the OEM and provide these inputs. They will suggest to you the available options to choose from.

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Choosing the appropriate power for a motorized valve involves a few key steps.

Power for a Motorized Valve

Here is a simple process:

1. Determine the requirements of the system:

The power required for a motorized valve depends on several factors, including the type of media it will control (e.g., water, gas, oil, etc.), the temperature and pressure of the media, and the valve’s size and material.

2. Identify the valve’s torque requirements:

The torque requirement of a valve is the force necessary to open or close it. You’ll need to consider static torque (the initial force to start movement) and dynamic torque (the ongoing force needed to keep the valve moving). The valve manufacturer typically provides these torque values. Always select a motor with a higher torque than the valve’s maximum requirement to ensure reliable operation.

3. Consider the operating speed:

The operating speed of a motorized valve refers to the time it takes for the valve to go from fully open to fully closed or vice versa. Faster operating speeds require more power, so if a quick response is critical to your application, you’ll need a more powerful motor.

4. Evaluate the duty cycle:

The duty cycle is the ratio of the valve’s “on” time to the total cycle time. If a valve needs to be open and closed frequently, it will require a motor with a high duty cycle and therefore more power.

5. Factor in the safety margin:

It’s crucial to factor in a safety margin to account for any unforeseen conditions or changes over time, such as increased system pressure or wear and tear on the valve. A common safety margin is an additional 25% of the calculated power requirement.

6. Consult the experts:

When in doubt, consult the valve manufacturer or a trusted industry professional. They have the experience and knowledge to help you determine the exact power requirements for your specific application.

Correctly sizing your motorized valve is essential to ensure the efficiency and longevity of your system. If you undersize the motor, it may not operate the valve effectively, leading to performance issues and premature failure. Conversely, if you oversize it, you may be wasting energy and money on a motor that’s more powerful than you need.