{"product_id":"rocket-teflon-ring-sicherheitsventil-dampf-wasserhahn","title":"Rocket Teflon ring for safety valve and steam\/water valve – A449904331","description":"\u003cdiv class=\"ccc-mobile-wrapper\"\u003e\n\u003cstyle\u003e.ccc-mobile-wrapper{max-width:880px;margin:0 auto;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;color:#1d1d1f;line-height:1.65;font-size:17px}.ccc-mobile-wrapper h2{font-size:1.7em;line-height:1.25;margin:0 0 .6em;font-weight:700}.ccc-mobile-wrapper h3{font-size:1.3em;line-height:1.3;margin:1.8em 0 .5em;font-weight:700}.ccc-mobile-wrapper h4{font-size:1.05em;margin:1.1em 0 .2em}.ccc-mobile-wrapper p{margin:0 0 1em}.ccc-mobile-wrapper a{color:#0b6b5f;text-decoration:underline}.ccc-compare-table{width:100%;border-collapse:collapse;margin:1em 0;font-size:.97em}.ccc-compare-table th,.ccc-compare-table td{text-align:left;padding:10px 12px;border-bottom:1px solid #e3e3e6;vertical-align:top}.ccc-compare-table th{width:42%;font-weight:600;color:#3a3a3c}.ccc-roastery-tip{background:#eff6f4;border-left:4px solid #0b6b5f;border-radius:10px;padding:16px 18px;margin:1.6em 0}.ccc-return-note{background:#fdf3ef;border-left:4px solid #b4532a;border-radius:10px;padding:16px 18px;margin:1.6em 0}.ccc-faq h4{font-weight:700;margin:1.2em 0 .2em}@media(max-width:600px){.ccc-mobile-wrapper{font-size:16px}.ccc-mobile-wrapper h2{font-size:1.45em}.ccc-mobile-wrapper h3{font-size:1.18em}}\u003c\/style\u003e\n\u003ch2\u003eA Teflon ring for two critical points\u003c\/h2\u003e\n\u003cp\u003eThis ring is one of the few items in the Rocket catalogue that is needed in two different places: on the boiler's safety valve and on the steam and water valve. Both are points where hot steam under pressure tries to get past a threaded connection and must be prevented from doing exactly that.\u003c\/p\u003e\n\u003cp\u003eThere is a reason why it is Teflon rather than rubber that sits there: the safety valve connection is permanently hot, and an elastomer would become hard and cracked there within a few years. Teflon stays stable, but loses a little height each time it is fitted. The part number is A449904331.\u003c\/p\u003e\n\u003ch3\u003eWhen it is due\u003c\/h3\u003e\n\u003cp\u003eA damp rim appears on the safety valve or the steam valve and comes back after wiping. The connection hisses quietly when the machine is at operating pressure. A white ring of limescale spreads outwards from the connection. Or the connection has already been opened once – then the ring should be replaced before it is closed again.\u003c\/p\u003e\n\u003ch3\u003eAt a glance\u003c\/h3\u003e\n\u003ctable class=\"ccc-compare-table\"\u003e\n\u003ctr\u003e\n\u003cth\u003eType\u003c\/th\u003e\n\u003ctd\u003eTeflon ring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLocation\u003c\/th\u003e\n\u003ctd\u003eSafety valve and steam and water valve\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFits\u003c\/th\u003e\n\u003ctd\u003eRocket machines with this connection – the documentation does not give a model list\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eScope of delivery\u003c\/th\u003e\n\u003ctd\u003eone ring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePart number\u003c\/th\u003e\n\u003ctd\u003eA449904331\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDesign\u003c\/th\u003e\n\u003ctd\u003eTeflon (PTFE); dimensions and thickness are not documented\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInstallation\u003c\/th\u003e\n\u003ctd\u003eInstallation by a specialist recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eRocket\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eImportant for installation\u003c\/h3\u003e\n\u003cp\u003eBoth installation points carry steam under pressure. The machine must be disconnected from the mains, completely cooled down and depressurised. In addition, the following applies to the safety valve without exception: the valve itself is never readjusted, closed off, bypassed, drilled open or blocked, and its blow-off path must remain clear. If you are only changing the seal, leave the valve itself as a component alone. We deliberately do not provide step-by-step instructions here.\u003c\/p\u003e\n\u003ch3\u003eWho it is for\u003c\/h3\u003e\n\u003cp\u003eFor workshops and for experienced owners who renew the sealing surfaces when servicing the boiler or the valves. If you are not sure whether your ring is this one, measure the old one and send us the measurement together with the serial number – at these two points, guessing is the more expensive option.\u003c\/p\u003e\n\u003ch3\u003eWhat goes with it\u003c\/h3\u003e\n\u003cp\u003eFrequently ordered together: the \u003ca href=\"\/en\/products\/rocket-sicherheitsventil-appartamento-tca\"\u003eSafety valve Appartamento TCA\u003c\/a\u003e, the \u003ca href=\"\/en\/products\/rocket-sicherheitsventil-r9-m229906083\"\u003eSafety valve R9\u003c\/a\u003e, the \u003ca href=\"\/en\/products\/rocket-leitung-sicherheitsventil-a279905786\"\u003ePipe to the safety valve\u003c\/a\u003e and the \u003ca href=\"\/en\/products\/rocket-o-ring-dampf-wasserhahn\"\u003eO-ring for the steam and water valve\u003c\/a\u003e. Everything else in \u003ca href=\"\/en\/collections\/zubehor-und-ersatzteile-rocket\"\u003eRocket accessories and spare parts\u003c\/a\u003e and in the \u003ca href=\"\/en\/collections\/serviceteile\"\u003espare parts\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eThe Teflon seals in the Rocket catalogue\u003c\/h3\u003e\n\u003cp\u003eWe stock five Teflon seals individually. They look similar and sit in quite different places – the part number decides, not the shape:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/en\/products\/rocket-teflon-dichtung-entlastungsventil-bruehgruppe\"\u003eRelief valve of the brew group, C469900783\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/en\/products\/rocket-teflon-dichtung-pilzkopfschraube-bruehgruppe\"\u003eMushroom-head screw of the brew group, C469900420\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/en\/products\/rocket-teflon-o-ring-36mm-bruehgruppe\"\u003eTeflon O-ring 36 mm for the brew group, C469900421\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/en\/products\/rocket-teflon-dichtung-dampf-wasser-appartamento-tca\"\u003eSteam and water, Appartamento TCA, A469909447\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/en\/products\/rocket-teflon-ring-sicherheitsventil-dampf-wasserhahn\"\u003eSafety valve and steam\/water valve, A449904331\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"ccc-roastery-tip\"\u003e\n\u003cp\u003e\u003cstrong\u003eFrom our workshop in Bern and Zürich\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAs a rule, we only touch the safety valve when we have to – and when we do, we change the Teflon ring as well, even if it still looks good. A ring costs less than a franc's worth of working time; opening the valve a second time costs considerably more. This is our routine, not a manufacturer's requirement. We then do the test extractions with the \u003ca href=\"\/en\/products\/nutty-delight-kaffee-blend-brasilien-indien\"\u003eNutty Delight\u003c\/a\u003e, the \u003ca href=\"\/en\/products\/cozy-chocolate-natural-brasilien-kaffeebohnen\"\u003eCozy Chocolate\u003c\/a\u003e or the \u003ca href=\"\/en\/products\/very-nutty-kraftiger-robusta-aus-indien\"\u003eVery Nutty\u003c\/a\u003e. The selection can be found under \u003ca href=\"\/en\/collections\/kaffeebohnen\"\u003eCoffee beans\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ccc-return-note\"\u003e\n\u003cp\u003e\u003cstrong\u003eReturns excluded\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSpare parts are excluded from exchange and return. They are procured specifically for each order and cannot be resold after installation or a trial fitting on the machine. Therefore, check the model, year of manufacture and serial number of your machine before ordering – or drop us a quick message and we will clarify the fit together. Your rights in the event of defective goods remain unaffected.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ccc-faq\"\u003e\n\u003ch3\u003eFrequently asked questions\u003c\/h3\u003e\n\u003ch4\u003e\u003cstrong\u003eIs this an electrical part?\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eNo. It is purely a seal made of Teflon, with no electrical function.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eIs it really the same ring for both points?\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eYes. The documentation lists A449904331 for both the safety valve and the steam and water valve. It is one item, not a pair.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eWhat are the ring's dimensions?\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eInner diameter, outer diameter and thickness are not documented. Send us the serial number of your machine and we will check the fit.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eMay I readjust the safety valve when changing the ring?\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eNo. A safety valve is never readjusted, closed off, bypassed, drilled open or blocked, and its blow-off path must remain clear. If it blows off, that is the signal of a problem, not the problem itself.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eCan I see the part in your showroom?\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eYes. We are in Bern at Gerberngasse 44 and in Zürich at Hagenholzstrasse 50b. Let us know shortly beforehand and we will have the part ready for you.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003eQuestions about the fit? Write to us at \u003ca href=\"mailto:office@coffeecoachingclub.ch\"\u003eoffice@coffeecoachingclub.ch\u003c\/a\u003e. We deliver across Switzerland and to Liechtenstein in 2-4 working days.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Is this an electrical part?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. It is purely a seal made of Teflon, with no electrical function.\"}},{\"@type\":\"Question\",\"name\":\"Is it really the same ring for both points?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. The documentation lists A449904331 for both the safety valve and the steam and water valve.\"}},{\"@type\":\"Question\",\"name\":\"What are the ring's dimensions?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Inner diameter, outer diameter and thickness are not documented. Send us the serial number of your machine and we will check the fit.\"}},{\"@type\":\"Question\",\"name\":\"May I readjust the safety valve when changing the ring?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. A safety valve is never readjusted, closed off, bypassed, drilled open or blocked, and its blow-off path must remain clear.\"}},{\"@type\":\"Question\",\"name\":\"Can I see the part in your showroom?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. We are in Bern at Gerberngasse 44 and in Zürich at Hagenholzstrasse 50b. Let us know shortly beforehand and we will have the part ready for you.\"}}]}\u003c\/script\u003e\n\u003c\/div\u003e","brand":"Rocket","offers":[{"title":"Default Title","offer_id":56310419521921,"sku":"A01501","price":1.43,"currency_code":"CHF","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0633\/2265\/2931\/files\/A01501_1.jpg?v=1790154455","url":"https:\/\/coffeecoachingclub.ch\/en\/products\/rocket-teflon-ring-sicherheitsventil-dampf-wasserhahn","provider":"Coffee Coaching Club GmbH","version":"1.0","type":"link"}