Honeywell Small Linear Thermoelectric Actuator with Visual Position Indicator – Reliable Valve Actuator for Heating & Cooling Systems, Model MT4-230-NC

The Honeywell MT4-230-NC Small Linear Thermoelectric Actuator offers precise and reliable operation for valves used in room and zone heating applications. Designed for noiseless, long-term performance, this compact actuator is perfect for controlling heating and cooling valves in fan coil units, radiators, floor heating systems, and manifolds.

Key Features

• Model MT4-230-NC – Normally closed actuator compatible with 230V mains supply.
• Visual position indicator – Red indicator behind the face window shows valve position and type of action (NO or NC) for easy monitoring.
• Noiseless operation – Silent performance suitable for residential and commercial environments.
• Reliable long-term operation – Robust construction ensures durability and consistent function.
• Compact design – Ideal for installation in limited space and on standard M30 x 1.5 valve fittings.
• Plug-in cable – Simplifies wiring and servicing with easy installation and maintenance.
• Water-protected housing – IP44 rated for protection in all mounting positions, suitable for heating system environments.
• Overload protection – 4 kV surge protection on 230V models for enhanced electrical safety.
• Operation modes – Supports two-position (on/off) or pulse width modulation (PWM) control for flexible heating and cooling modulation.
• Snap-on valve adapter – Tool-free mounting for fast and secure installation on thermostatic radiator valves and valve inserts.

Technical Specifications

Installation & Usage

• Perfect for use in heating and cooling systems including fan coil units, radiators, underfloor heating manifolds, chilled ceilings, and convectors.
• Snap-on mounting adapter makes installation tool-free and easy to replace or service.
• Compatible with thermostatic radiator valves, motorised valve inserts and manifold systems using M30 x 1.5 fittings.
• Recommended for precise zone control with time-controlled or pulse width modulation regulation.
• Ensure professional installation for safe electrical connection and optimal system performance.

Box Contents

• Honeywell MT4-230-NC Small Linear Thermoelectric Actuator
• Integrated visual position indicator
• Plug-in cable for easy wiring
• Valve adapter for snap-on mounting
• User manual and installation guide

The Honeywell MT4-230-NC is a dependable, compact actuator designed for noiseless valve operation with easy installation and clear position indication, ideal for upgrading or maintaining efficient heating and cooling systems in UK homes and commercial properties.

Please note: Delivery times may vary depending on location, with specific details outlined below.

Standard Delivery

UK Mainland 

• Delivery Time: 2–4 working days
• Free Delivery on all orders

Express Delivery

UK Mainland

• Delivery Time: 1–3 working days
• Delivery fee of £15

Channel Islands

• Postcodes Covered: GY*, IM*, JE* 
• Minimum Order: £50
• Delivery Fee: £70

Northern Ireland, Offshore Territories & Scottish Islands 

• Postcodes Covered: BT*, HS*, KW, ZE
• Minimum Order: £50
• Delivery Fee: £35

Same Day Delivery 

• Eligible Postcodes:
  E*, EC*, N*, NW*, SE*, SW*, W*, WC*, HA*, UB*, EN*, IG*, RM*, KT*, SM*, CR*, BR*, DA*, TW*
• Minimum Order: £50
• Same Day Delivery Fee: £60
• Special Requests or Locations:
  For areas outside these postcodes or urgent quotes, please email orders@qualityheating.co.uk and we’ll do our best to accommodate.

Collections

Want to collect your order instead?You’re welcome to do so — just email us at orders@qualityheating.co.uk or message us via WhatsApp with your preferred collection time, and we’ll confirm the details.

Collection address: 284 Water Rd, Unit 9, London, HA0 1HX