Description
Mid Position Valve Actuator – Reliable Control for Central Heating Systems
This mid position valve actuator is designed for precise control of central heating and domestic hot water systems using a standard 3-port mid-position valve. It allows the system to direct water flow to heating, hot water, or both at the same time, making it a key component in Y-plan heating systems.
Commonly used as a replacement mid position valve actuator, this unit is suitable for domestic and light commercial installations where reliable motorised control is required. It is compatible with typical mid-position valve bodies and provides smooth, dependable operation to support efficient system performance.
Built with durability in mind, the actuator delivers consistent switching and long service life. It is ideal for engineers and homeowners looking to restore correct heating control, improve system reliability, or replace a faulty actuator without changing the entire valve assembly.
For full compatibility details, wiring information, and technical specifications, please refer to the specification section above.
Key features
- Smooth Performance: Synchronous motor with spring return for reliable operation.
- Wide Compatibility: Designed for Tower mid-position valves VAL322MP and VAL328MP.
- Pre-Wired Flex: Supplied with a 1-metre, 5-core cable for easy installation.
- Standard Wiring Colours: White, blue, grey, orange, and green/yellow.
This Mid-Position Valve Actuator is a practical choice for domestic heating systems where dependable operation, clear control and straightforward installation are important.
Why Choose the Tower A3MID as a Honeywell V4073A Alternative?
The Tower A3MID 3-Port Mid-Position Valve Actuator is a reliable and cost-effective alternative for systems originally fitted with the Honeywell V4073A. Designed for use in domestic and light commercial heating systems, it offers industry-standard compatibility while focusing on long-term durability.
One of the key differences is the all-metal geared gearbox, which, in our opinion, provides superior resistance to wear compared to polymer (plastic) gears used in many modern actuators. Despite common claims that polymer gears reduce noise and increase lifespan, real-world use shows no discernible difference in noise or service life, while metal gears retain their strength over time.
The Tower A3MID features a synchronous motor with spring return, standard 5-wire installation, and a manual override lever, making it a straightforward and installer-friendly replacement option. Typically available at around one-third of the cost of the Honeywell V4073A replacement powerhead, it represents excellent value without compromising on performance.
👉 Read our in-depth guide:
Honeywell V4073A Alternative – Why the Tower A3MID Is a Smart Replacement Actuator – Click Here
- This mid position actuator 5 wire
- Replacement valve actuator can be fitted without draining the system
- Actuator suitable for 22 mm and 28 mm valve
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