{"product_id":"vokera-mcf-dmcf-18-72-dmcf-18-72-mcf-21-84-dmcf-boiler-gas-valve-4640","title":"VOKERA MCF-DMCF 18\/72 DMCF 18\/72 MCF \u0026 21\/84 DMCF BOILER GAS VALVE 4640","description":"\u003ch1\u003e\u003cspan\u003eVokera MCF DMCF 18\/72 21\/84 Boiler Gas Valve 4640\u003c\/span\u003e\u003c\/h1\u003e\n\u003ch2\u003e\u003cspan\u003eProduct Overview\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eVokera Boiler Gas Valve (Part Number: 4640)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is a gas control component designed for use within selected Vokera boiler systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePart number \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e4640\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is identified as a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eGas Valve Complete 220\/240V\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e in specialist boiler spare-parts catalogues.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe gas valve forms part of the boiler's gas and combustion system, controlling the supply of gas to the burner during appliance operation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePart number \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e20040069\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is listed as a replacement reference for the original Vokera gas valve 4640.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eℹ️ \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eProduct Condition:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis product may be available in \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eNew, Refurbished, or Compatible\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e condition. Please select the required option when ordering.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eTechnical Insight \u0026amp; Common Failure Symptoms\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThe gas valve controls the flow of gas to the burner as part of the boiler's normal operating sequence. Its operation is coordinated with the appliance's control and safety systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePossible symptoms that may require investigation of the gas valve or associated components include:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eBoiler failing to ignite\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eBurner failing to establish correctly\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eIntermittent burner operation\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eBoiler failing to respond to heating demand\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eBoiler entering a safety lockout\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eGas flow to the burner not operating as expected\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eThese symptoms do \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003enot necessarily confirm a faulty gas valve\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, as similar problems can be caused by ignition components, electrical controls, gas supply issues or other parts of the boiler. Correct professional diagnosis should be carried out before replacement.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eSafety Advice\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003e\u003cspan\u003eGas valves are safety-critical components within a gas appliance and must only be diagnosed, removed, installed or adjusted by a \u003c\/span\u003e\u003c\/em\u003e\u003cstrong\u003e\u003cem\u003e\u003cspan\u003eGas Safe registered engineer\u003c\/span\u003e\u003c\/em\u003e\u003c\/strong\u003e\u003cem\u003e\u003cspan\u003e who is suitably qualified for the appliance and work being undertaken.\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cspan\u003eThe appliance and gas supply must be safely isolated before any work is carried out. The manufacturer's servicing instructions must be followed, and all required gas-tightness, combustion and operational safety checks must be completed before the appliance is returned to service.\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e","brand":"Vokera","offers":[{"title":"New \/ New Other","offer_id":50405942231143,"sku":"N6870","price":90.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0615\/0923\/8887\/files\/edited-photo_13.jpg?v=1791539320","url":"https:\/\/nationalboilerspares.co.uk\/products\/vokera-mcf-dmcf-18-72-dmcf-18-72-mcf-21-84-dmcf-boiler-gas-valve-4640","provider":"National Boiler Spares","version":"1.0","type":"link"}