Johnson Controls VA9203-BUB-2 electric valve actuator is a bidirectional actuator utilised to precisely control the opening and closing of valves. It is suitable for use with the brand's VG1000 Series (DN15, DN20 and DN25) ball valves. This spring-return ball valve actuator delivers rated torque even when power is not applied.
Working Mechanism:
- The electronic control circuit of the actuator receives input signals from the control system, determining the intended position of the valve.
- Within the actuator, an electric motor plays a crucial role in generating the force required to operate the valve. Upon receiving a signal from the control circuit, the motor initiates rotation.
- A gear mechanism is employed to transfer the rotational motion produced by the motor. This gear system transforms the rapid rotation of the motor into a slower yet higher-torque output, ensuring effective control over the movement of the valve.
Frequently Asked Questions:
Q. What is the ambient temperature of this spring-return ball valve actuator?
A. It has an ambient temperature range of -22 to 140 degrees F.A. It has an ambient temperature range of -22 to 140 degrees F.
Q. How can you perform a test on an actuator valve?
A. One common method is conducting a fire test, which entails subjecting the valve to intense flames for around 30 minutes, followed by rapid cooling using cold water. This simulation replicates the effects of a fire and exposes the valve to drastic thermal changes. Alternatively, assessing the valve's margin is another approach to evaluate its performance.
Q. What is the difference between an electric actuator and a solenoid valve?
A. The electric actuator features a manual operation device that allows for manual control of the valve's on / off function without requiring an additional bypass installation for backup purposes. On the other hand, conventional solenoid valves lack this manual operation feature, necessitating the installation of a bypass manual valve in the pipeline to serve as a backup mechanism.
Q. How do you size a Johnson Controls VA9203-BUB-2 electric valve actuator?
A. When determining the appropriate size for an actuator, start by evaluating your valve's torque demands. This encompasses various factors. Break torque, also known as opening torque, signifies the force necessary to initiate the motion of a closed valve. Running torque, alternatively referred to as mid-stroke torque, denotes the force needed to sustain the valve's movement between the open and closed positions.
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Order Value should be £500+