The Drayton 22 mm Mid-Position Valve and Actuator (27101) is a motorised control valve assembly used in central heating and hot water systems. It automatically manages the direction of heated water flow between two circuits—typically heating and hot water—based on signals from thermostats or a heating programmer.

Function & Purpose

This mid-position valve directs the flow of water to the central heating circuit, the hot water circuit, or both simultaneously depending on demand. When the thermostat calls for heating only, the valve moves to allow flow to the radiator circuit. When there is a call for hot water, the valve shifts to send water to the hot water cylinder. In its mid-position it can allow flow to both circuits if the control system requires both heating and hot water at the same time. This automatic switching helps improve comfort and system efficiency without the need for manual operation.

Compatibility

The valve’s 22 mm connection size makes it suitable for standard domestic and light commercial central heating systems that use 22 mm copper or compatible pipework. The actuator integrates with typical room and cylinder thermostats, heating programmers, and boiler control systems that provide standard motorised valve control signals.

Design & Build Quality

The Drayton 27101 valve and actuator assembly combines a robust valve body with a reliable motorised actuator. The components are engineered for durability and smooth, quiet operation over many cycles. The actuator housing is designed to protect internal gearing and motor mechanisms from environmental conditions found in boiler and plant room settings.

Ideal Applications

This mid-position valve and actuator is ideal for zoned heating systems or systems with separate heating and hot water circuits. It is commonly used in conventional boiler installations with hot water cylinders and is suitable for new system builds, upgrades, or replacements where automatic control of water flow between circuits is required.