JOHNSON CONTROLS VA-7152-1001 Electric Valve Actuator, 90 Inch-lb, Proportional

Johnson Controls VA-7152-1001 electric valve actuator is a device used to automate the operation of globe valves. It is commonly used in oil & gas, water treatment, power generation and chemical processing sectors. This proportional valve actuator offers precise control over fluid flow. It enables quick adjustments to flow rates, pressure and valve positions while reducing manual labour.

Working Mechanism:

• The VA-715x Series electric valve actuator uses a reversible synchronous motor and a magnetic clutch to accurately position the valve.
• Even if power to the actuator is removed, it maintains the shutoff force.
• When the controller directs the actuator to move in the opposite direction, the shutoff force decreases, allowing valve modulation.
• The magnetic clutch maintains a constant load at the end of travel to ensure tight valve shutoff and compensate for seat wear.
• This proportional valve actuator offers proportional stroke capabilities based on the input control signal, which can be set at 0 to 10, 0 to 5 or 5 to 10 VDC via jumper selection.
• An electronic controller sends a proportional input signal to the actuator, compared to the actual valve position via an internal feedback potentiometer.
• The internal circuit then activates the motor to rotate in the desired direction based on the comparison.

Features:

• Johnson Controls VA-7152-1001 electric valve actuator features a magnetic clutch that provides constant output force for positive valve closure and protects the motor in stall conditions.
• It has a selectable direct and reverse action, which simplifies setup and installation.
• This proportional valve actuator is a compact unit that provides 90 lb of force output, covering a wide range of applications with a single actuator.
• Its unique yoke design allows for easy field mounting to Johnson Controls VG7000 Series valves, which reduces installation and stroke adjustment time.
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• This Johnsons VA-715x Series electric valve actuator can handle fluids as hot as 280 degrees F.
• It further features bronze construction to resist the corrosive nature of water.

Compatible Accessories:

• Johnson Controls V-9999-670 Adaptor Bonnet: This adapter allows the user to mount the actuator to any Johnson valve.

Standards and Approvals:

• UL
• CSA

Frequently Asked Questions:

Q. What is the cycle time of this actuator?

A. This actuator has a cycle time of 70 seconds.

Q. What is the input impedance required for Johnson Controls VA-7152-1001 electric valve actuator?

A. This actuator requires an input impedance of 100000 Ohm.

Q. What is the difference between electric and pneumatic actuators?

A.

• The major difference between an electric and a pneumatic actuator is the driving force of their operation.
• Air supply for pneumatic actuators must be between 60 and 125 PSI, whereas electric actuators are used when there is no air supply available.

Q. What are some common troubleshooting tips for this VA-715X Series electric valve actuator?

A. If you are experiencing issues with electric valve actuators, check for power supply issues, loose electrical connections, mechanical obstructions or sensor malfunctions.

Q. Can this Johnson Controls VA-7152-1001 actuator handle harsh industrial conditions?

A. This Johnson Controls proportional valve actuator is IP42 rated, which means it is protected from water spray at angles less than 15 degrees from vertical, as well as tools and small wires larger than 1 millimetre.