{"product_id":"robertshaw-millivolt-gas-valve-magnet-unitrol-flame-failure-rbs83399","title":"Robertshaw Millivolt Gas Valve Magnet - Unitrol Flame Failure Power Unit (RBS83399)","description":"\u003ch2 style=\"border-bottom:3px solid #1a1a1a;padding-bottom:6px;margin:24px 0 12px;font-size:19px;\"\u003eDescription\u003c\/h2\u003e\u003cp\u003eThis is a Robertshaw millivolt gas valve magnet (part RBS83399) - the flame-failure power unit for Robertshaw Unitrol gas valves. It is designed for a millivolt (thermopile) system, where a thermopile generates a higher voltage (around 750 millivolts) that both holds the magnet in and powers the valve, with no external electrical supply. If the flame fails, the magnet releases and shuts off the gas supply.\u003c\/p\u003e\u003cp\u003eThis is the \u003cstrong\u003emillivolt\u003c\/strong\u003e version and is not interchangeable with the thermocouple version - fitting the wrong type will stop the valve holding open.\u003c\/p\u003e\u003ch2 style=\"border-bottom:3px solid #1a1a1a;padding-bottom:6px;margin:24px 0 12px;font-size:19px;\"\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable style=\"border-collapse:collapse;width:100%;margin:8px 0 18px;border:1px solid #e5e5e5;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"background:#1a1a1a;color:#ffffff;text-align:left;padding:10px 16px;font-size:14px;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"background:#1a1a1a;color:#ffffff;text-align:left;padding:10px 16px;font-size:14px;\"\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background:#eef4ff;\"\u003e\n\u003ctd style=\"background:#f8f8f8;font-weight:600;padding:10px 16px;font-size:14px;width:40%;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:10px 16px;font-size:14px;\"\u003eRobertshaw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#eef4ff;\"\u003e\n\u003ctd style=\"background:#f8f8f8;font-weight:600;padding:10px 16px;font-size:14px;width:40%;\"\u003eType\u003c\/td\u003e\n\u003ctd style=\"padding:10px 16px;font-size:14px;\"\u003eMillivolt gas valve magnet (flame-failure power unit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#eef4ff;\"\u003e\n\u003ctd style=\"background:#f8f8f8;font-weight:600;padding:10px 16px;font-size:14px;width:40%;\"\u003eManufacturer Part Number (MPN)\u003c\/td\u003e\n\u003ctd style=\"padding:10px 16px;font-size:14px;\"\u003eRBS83399\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f9f9f9;\"\u003e\n\u003ctd style=\"background:#f8f8f8;font-weight:600;padding:10px 16px;font-size:14px;width:40%;\"\u003eSystem\u003c\/td\u003e\n\u003ctd style=\"padding:10px 16px;font-size:14px;\"\u003eMillivolt operated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#ffffff;\"\u003e\n\u003ctd style=\"background:#f8f8f8;font-weight:600;padding:10px 16px;font-size:14px;width:40%;\"\u003eFits\u003c\/td\u003e\n\u003ctd style=\"padding:10px 16px;font-size:14px;\"\u003eRobertshaw Unitrol gas valves\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f9f9f9;\"\u003e\n\u003ctd style=\"background:#f8f8f8;font-weight:600;padding:10px 16px;font-size:14px;width:40%;\"\u003eFunction\u003c\/td\u003e\n\u003ctd style=\"padding:10px 16px;font-size:14px;\"\u003eHolds the gas valve open while the pilot is lit; releases to shut off gas on flame failure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#ffffff;\"\u003e\n\u003ctd style=\"background:#f8f8f8;font-weight:600;padding:10px 16px;font-size:14px;width:40%;\"\u003eCondition\u003c\/td\u003e\n\u003ctd style=\"padding:10px 16px;font-size:14px;\"\u003eNew\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3 style=\"font-weight:700;margin:18px 0 8px;font-size:16px;\"\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits Robertshaw Unitrol gas valves running a millivolt flame-failure system. This part is not for use on standard thermocouple valves - use RBS83397 for those. If in doubt, contact us with your valve make, model and existing part number and we will confirm compatibility before you order.\u003c\/p\u003e\u003ch3 style=\"font-weight:700;margin:18px 0 8px;font-size:16px;\"\u003eGas Safety\u003c\/h3\u003e\u003cdiv style=\"border-left:4px solid #c0392b;background:#fdf3f2;border-radius:2px;padding:12px 16px;margin:12px 0;font-size:14px;\"\u003e\n\u003cstrong\u003eGas safety:\u003c\/strong\u003e this is a gas valve safety component. Installation must be carried out by a Gas Safe registered engineer, who will confirm the flame-failure operation and gas soundness after fitting.\u003c\/div\u003e\u003ch2 style=\"border-bottom:3px solid #1a1a1a;padding-bottom:6px;margin:24px 0 12px;font-size:19px;\"\u003eSigns You Need To Replace This Part\u003c\/h2\u003e\u003cul\u003e\n\u003cli style=\"margin:4px 0;\"\u003eThe pilot or burner lights while the control knob is held in, but drops out when released\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003eThe valve will not hold open even with a known-good thermopile\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003eIntermittent flame-failure shut-off during normal operation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2 style=\"border-bottom:3px solid #1a1a1a;padding-bottom:6px;margin:24px 0 12px;font-size:19px;\"\u003eWhat Is Included\u003c\/h2\u003e\u003cul\u003e\u003cli style=\"margin:4px 0;\"\u003e1 x Robertshaw millivolt gas valve magnet (RBS83399)\u003c\/li\u003e\u003c\/ul\u003e\u003cp style=\"color:#c0392b;font-weight:600;\"\u003eThermocouple, thermopile and gas valve are not included.\u003c\/p\u003e\u003ch2 style=\"border-bottom:3px solid #1a1a1a;padding-bottom:6px;margin:24px 0 12px;font-size:19px;\"\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cdiv itemscope itemtype=\"https:\/\/schema.org\/FAQPage\"\u003e\n\u003cdiv style=\"border-left:4px solid #1a1a1a;background:#f9f9f9;border-radius:2px;padding:12px 16px;margin:10px 0;\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"\u003e\n\u003cp style=\"font-weight:700;margin:0 0 6px;\" itemprop=\"name\"\u003eWill this magnet fit my Robertshaw Unitrol gas valve?\u003c\/p\u003e\n\u003cdiv itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\"\u003e\u003cp style=\"margin:0;\" itemprop=\"text\"\u003eIt fits Robertshaw Unitrol gas valves that use a millivolt flame-failure system. Confirm your valve is the millivolt type before ordering, as the millivolt and the other version are not interchangeable.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border-left:4px solid #1a1a1a;background:#f9f9f9;border-radius:2px;padding:12px 16px;margin:10px 0;\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"\u003e\n\u003cp style=\"font-weight:700;margin:0 0 6px;\" itemprop=\"name\"\u003eWhat is the difference between the thermocouple and millivolt magnet?\u003c\/p\u003e\n\u003cdiv itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\"\u003e\u003cp style=\"margin:0;\" itemprop=\"text\"\u003eThe thermocouple magnet (RBS83397) is for standard thermocouple systems, and the millivolt magnet (RBS83399) is for millivolt \/ thermopile systems, which run at a higher voltage. They have different coils and must not be swapped for one another.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border-left:4px solid #1a1a1a;background:#f9f9f9;border-radius:2px;padding:12px 16px;margin:10px 0;\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"\u003e\n\u003cp style=\"font-weight:700;margin:0 0 6px;\" itemprop=\"name\"\u003eWhat does the gas valve magnet do?\u003c\/p\u003e\n\u003cdiv itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\"\u003e\u003cp style=\"margin:0;\" itemprop=\"text\"\u003eIt is the electromagnet inside the valve. Held energised by a millivolt (thermopile) system, where a thermopile generates a higher voltage (around 750 millivolts) that both holds the magnet in and powers the valve, with no external electrical supply. If the flame goes out, the power falls away, the magnet releases and the gas is shut off - the flame-failure safety function.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border-left:4px solid #1a1a1a;background:#f9f9f9;border-radius:2px;padding:12px 16px;margin:10px 0;\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"\u003e\n\u003cp style=\"font-weight:700;margin:0 0 6px;\" itemprop=\"name\"\u003eHow do I know mine has failed?\u003c\/p\u003e\n\u003cdiv itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\"\u003e\u003cp style=\"margin:0;\" itemprop=\"text\"\u003eA common sign is a pilot or burner that lights while you hold the control knob in, but goes out as soon as you release it, once the thermocouple \/ thermopile and its connections have been checked.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border-left:4px solid #1a1a1a;background:#f9f9f9;border-radius:2px;padding:12px 16px;margin:10px 0;\" itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"\u003e\n\u003cp style=\"font-weight:700;margin:0 0 6px;\" itemprop=\"name\"\u003eWho should fit this part?\u003c\/p\u003e\n\u003cdiv itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\"\u003e\u003cp style=\"margin:0;\" itemprop=\"text\"\u003eA Gas Safe registered engineer. It is a gas safety component and must be installed and tested by a qualified engineer.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch2 style=\"border-bottom:3px solid #1a1a1a;padding-bottom:6px;margin:24px 0 12px;font-size:19px;\"\u003eWhy LaunchCatering\u003c\/h2\u003e\u003cp\u003eStocked in the UK and matched by specification. We identify the exact power unit type so you can confirm it against your valve before you order. A trusted supplier of commercial catering gas spares.\u003c\/p\u003e","brand":"Robertshaw","offers":[{"title":"Default Title","offer_id":57943491772748,"sku":"LC-RBS83399","price":35.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/4857\/7612\/files\/imgi_18_s-l1600.webp?v=1784767004","url":"https:\/\/launchcatering.com\/products\/robertshaw-millivolt-gas-valve-magnet-unitrol-flame-failure-rbs83399","provider":"LAUNCHCATERING LTD","version":"1.0","type":"link"}