Honeywell ML7984A4009 valve actuator is a self-adjusting, self-contained, motorised actuator that controls the opening and closing of a valve. It provides the necessary force to move the valve to the desired position. This Honeywell butterfly valve actuator finds application in various oil & gas, water treatment, power generation, chemical processing, HVAC and manufacturing processes. It easily attaches to Honeywell V5011A1858/U 2-way globe valveor Honeywell V5013C1043/U 3-way globe valvefor linear stem operation.
Features:
- Honeywell ML7984A4009 valve actuator supports multiple valves using a single transformer power supply.
- It is small in size and ideal for installation in confined spaces.
- This Honeywell butterfly valve actuator's linkage self-adjusts to valve strokes of up to 19 mm (3/4 inches).
- Its electronic current sensing provides internal protection and a positive full closure force.
Compatible Accessories:
- Honeywell 272630A auxiliary switch assembly (1-SPDT) and Honeywell 272630B auxiliary switch assembly (2-SPDT) are suitable for seamless electrical connections.
- Honeywell 40003793-003 Mounting Hardware Bag Assembly: This 8-piece assembly kit is useful for the initial mounting of the brand's valve actuator.
- Honeywell 272822 Resistor Kit: This kit helps users connect the butterfly valve actuator with multiple Series 90 valves (quarter-turn valves).
Frequently Asked Questions:
Q. What is the difference between single-acting and double-acting actuators?
A. Single-acting actuators use air pressure to open or close a valve, whereas double-acting actuators can do both.
Q. How to mount Honeywell ML7984 valve actuator?
A.
- It is advisable to mount the ML7984 valve actuator above the valve body.
- This positioning helps minimise the risk of damage to the valve actuator in case of condensation or leakage from the valve gland.
- Begin by removing the stem button from the valve stem.
- Ensure to save the set screw located inside the stem button for later use.
- The button itself is not required for the mounting process.
- Slide the position indicator, which could be a plastic disk or rubber O-ring, over the valve stem.
- The indicator will automatically align itself to the marking on the yoke after completing one full operating cycle.
Q. How to assemble Honeywell butterfly valve actuator?
A.
- Begin by sliding the yoke over the valve bonnet.
- Thread the ML7984 drive shaft onto the valve stem completely by rotating the valve actuator clockwise.
- Ensure that the drive shaft is fully attached with no threads showing.
- Use a pin or wrench to prevent the valve stem from turning while tightening.
- Avoid damaging the threads or any other parts of the stem while tightening.
- Orient the conduit hole in the most suitable direction, then tighten the locknuts on the U-bolt securely.
- Loosen the two screws located on the top of the valve actuator to remove the plastic cover.
- These screws are captive, so rotate them three complete revolutions to release the cover.
- Once removed, drop either a slot-headed or Allen Hex type of set screw (both included in the plastic bag) into the top of the shaft, with the slotted or hexed side facing up.
- Depending on the type of set screw used, tighten it using a 5mm (3/16 inch) slotted screwdriver or a 1/8x 6 Allen wrench. This will lock the valve stem in place.
