{"product_id":"drayton-28mm-motorised-3-port-mid-position-valve-snap-on-actuator","title":"Drayton 28mm Motorised 3 Port Mid-Position Valve \u0026 Snap-On Actuator","description":"\u003cdiv class=\"product-section\"\u003e\n\u003cp\u003e\u003cstrong\u003eDrayton 28mm Motorised 3 Port Mid-Position Valve \u0026amp; Snap-On Actuator (6 Wire SPDT Switch) – MPN: 27206\u003c\/strong\u003e is a high-quality, UK-manufactured mid-position valve assembly for domestic wet central heating systems. It features a 3-port brass valve body with 28mm compression connections and a 230V snap-on actuator with 6-core SPDT switch wiring, allowing the system to supply central heating, hot water, or both simultaneously in a classic Y-Plan configuration.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3-port mid-position control\u003c\/strong\u003e – directs flow to hot water only, heating only or both circuits together, ideal for Y-Plan systems with a cylinder and radiators.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e28mm compression connections\u003c\/strong\u003e – larger-bore valve body with 28mm compression fittings for higher flow rates and reduced pressure drop on bigger systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSnap-on actuator\u003c\/strong\u003e – actuator can be removed and replaced at the push of a button, without draining the system, simplifying maintenance and upgrades.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e6-wire SPDT switch\u003c\/strong\u003e – industry-standard 6-core wiring (SPDT microswitch) for straightforward connection to most modern wiring centres.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpring-return mechanism\u003c\/strong\u003e – power-to-open \/ spring-return design fails the valve back to a safe position on power loss.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e100% tight shut-off\u003c\/strong\u003e – engineered for positive closure, helping to prevent unwanted flow and bypassing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManual lever \u0026amp; position indicator\u003c\/strong\u003e – allows manual operation and visual confirmation of valve position during filling, testing or emergency use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaceable motor and actuator\u003c\/strong\u003e – both actuator and motor can be replaced as spare parts, extending system life and reducing disruption.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTechnical Highlights\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Drayton (Motorised Valves range).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel \/ Part:\u003c\/strong\u003e MA1\/779-3 28mm 3-port mid-position valve, complete with actuator (Part No. 27206).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve type:\u003c\/strong\u003e 3-port mid-position (heating, hot water, or a combination of both).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnections:\u003c\/strong\u003e 28mm compression.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody material:\u003c\/strong\u003e brass forging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard motor voltage:\u003c\/strong\u003e 230V AC, 50Hz, approximately 5W.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAction:\u003c\/strong\u003e Type 1.C, power to open, spring return.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax static pressure:\u003c\/strong\u003e 8.6 bar.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax differential pressure:\u003c\/strong\u003e approx. 0.7 bar (28mm mid-position).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater temperature range:\u003c\/strong\u003e 2°C to 93°C.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax ambient temperature:\u003c\/strong\u003e 52°C.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlow characteristic (Kv):\u003c\/strong\u003e approx. 7.0 for 28mm mid-position model.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLead length:\u003c\/strong\u003e 1 metre, 6-core cable.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSwitch rating:\u003c\/strong\u003e 24–230V AC, 3(1)A.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApprox. dimensions (28mm mid-position):\u003c\/strong\u003e height ~150mm, valve body length ~105mm, overall width ~150mm (see Drayton datasheet for exact A–F dimensions).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards:\u003c\/strong\u003e conforms to EN 60730-1 and related control standards.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTypical Applications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eTraditional Y-Plan domestic heating systems with one heating zone and one stored hot water cylinder.\u003c\/li\u003e\n\u003cli\u003eUpgrades and replacements where an existing 28mm 3-port mid-position valve is fitted and industry-standard wiring is already in place.\u003c\/li\u003e\n\u003cli\u003eLarger domestic properties or small commercial systems requiring higher flow through 28mm primary pipework.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eValve body should be installed by a competent heating engineer, observing correct flow direction (usually from bottom port) and system flushing\/cleaning best practice.\u003c\/li\u003e\n\u003cli\u003eThe snap-on actuator can often be fitted or replaced without draining the system, but always follow Drayton’s installation instructions and isolate power before work.\u003c\/li\u003e\n\u003cli\u003eUse the standard 6-wire SPDT wiring diagram (Y-Plan) in the wiring centre, ensuring correct connections to room stat, cylinder stat and boiler.\u003c\/li\u003e\n\u003cli\u003eEnsure the valve is accessible for future servicing, with space to remove the actuator and view the position indicator and manual lever.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Drayton Controls","offers":[{"title":"Default Title","offer_id":62858031628637,"sku":"27206","price":149.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/Drayton28mmMotorised3PortMid-PositionValveandActuator.jpg?v=1765525943","url":"https:\/\/qualityheating.co.uk\/products\/drayton-28mm-motorised-3-port-mid-position-valve-snap-on-actuator","provider":"AIZO Quality Heating","version":"1.0","type":"link"}