{"product_id":"fl-76kf25-ft","title":"Vacuum Sealing Assembly for 3\" Tube w\/ KF-25 Port \u0026 1\/4\" Feedthrough - FL-76KF25-FT (D\/M)","description":"This is a pair of smart sealing assemblies for 3\" vacuum tube furnace to seal both ends of 76 +\/- 1.0 mm tube without any welding and gluing. SPECIFICATIONS Package included One Mechanical Pressure Gauge ( Optional: Digital Pressure Gauge), two flanges, two steel sealing rings, four high-temperature silicone O-rings ( 300 o C Max.), and six screws Structure Features Seal tube by tightening screws on the flange without any welding and glue. Made of Stainless Steel ( SS304) with double high-temperature silicon O-rings on each flange. Vacuum level: 10E-2 torr by a mechanical pump 10E-5 torr by a small turbopump and 10-6 torr by hi-speed turbopump Descriptions 3” flange with various optional pls choose from Product Options ) One end of the flange has a barbed needle valve, a 1\/4\" feedthrough (the nut is with M15*1.5 thread) for thermocouple inserted, and a 1\/8 NPS valve with an installed Mechanical Pressure Gauge . (if you need Compact Digital Vacuum Gauge, please choose from the product option at extra cost. If you don't need a vacuum gauge, please instruct us when you order, we can take it off, but no price deduction ) Another end of the flange has a KF25 port with a barbed needle valve. You may need a KFD25 angle valve before connecting the vacuum port to the vacuum pump. Please choose the KF25 angle valve at the related product below. Seal the tube by tightening the screws on the flange without any welding and glue. 1\/4\" in diameter vacuum sealing assembly will connect with a 1\/4\" rubber hose. Designed for MTI OTF-1200X Desktop Quartz Tube Furnace. Excellent for any type of tubing: ceramic, glass, quartz, and steel pipe. Options Please click here to order a digital vacuum gauge for precision vacuum control up to 10 -4 torr For CVD application, please choose anti-corrosive vacuum gauge ( click pic below left 2 ) You can choose the various end of fitting as options ( click here to order separately ) You may click here to order a flowmeter to control gas flowing You may order flange support to avoid tube turning ( pic below right) Notes Must put a refractory tube block in front of the flange (see picture below) to avoid heat radiation melting silicone O-ring. You can order a ceramic block in related products. Please do not over-tighten the three hex screws on the flanges to avoid overpressure incidents. The recommended torque is 35~40 inch-lbs. For liability considerations, MTI does not recommend or endorse the use of any toxic, flammable, or corrosive gasses with our flange assemblies. Please contact us with any concerns. click pic to choose other size flanges\u003cbr\u003e\u003cbr\u003e\u003ctable border=\"1\" cellpadding=\"1\" cellspacing=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage included\u003c\/td\u003e\n\u003ctd\u003eOne \u003ca href=\"cvm60yz\" rel=\"noopener\" target=\"_blank\"\u003eMechanical Pressure Gauge\u003c\/a\u003e\u003ca href=\"http:\/\/www.mtixtl.com\/vacuumpressuregaugeformtistubefurnaces14npt.aspx\"\u003e\u003c\/a\u003e ( Optional: Digital Pressure Gauge), two flanges, two steel sealing rings, four high-temperature silicone O-rings ( 300\u003csup\u003eo\u003c\/sup\u003eC Max.), and six screws\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cbr\u003e\u003cbr\u003eStructure\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0638\/4664\/6008\/files\/CELogo.1_1d34a0d9-fbb7-491d-99ee-b12adf77c1f4.jpg?v=1706210189\" rel=\"noopener\" target=\"_blank\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0638\/4664\/6008\/files\/CELogo.1_100x100.jpg\"\u003e\u003c\/a\u003e    \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0638\/4664\/6008\/files\/kai_zhuang_fa_labig.jpg?v=1706115727\" rel=\"noopener\" target=\"_blank\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0638\/4664\/6008\/files\/kai_zhuang_fa_la_100x100.jpg\"\u003e\u003c\/a\u003e     \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0638\/4664\/6008\/files\/50flbig_01e676ae-8c39-42e2-9d8b-ab4f6422cfe0.jpg?v=1706209465\" rel=\"noopener\" target=\"_blank\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0638\/4664\/6008\/files\/50fl_100x100.jpg\"\u003e\u003c\/a\u003e    \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0638\/4664\/6008\/files\/digital_gauge.jpg?v=1706057566\" rel=\"noopener\" target=\"_blank\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0638\/4664\/6008\/files\/digital_gauge_123_100x100.jpg\"\u003e\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cbr\u003eFeatures\u003c\/td\u003e\n\u003ctd\u003e\n\u003cul\u003e\n\u003cli\u003eSeal tube by tightening screws on the flange without any welding and glue.\u003c\/li\u003e\n\u003cli\u003eMade of Stainless Steel ( SS304) with double high-temperature silicon O-rings on each flange.\u003c\/li\u003e\n\u003cli\u003eVacuum level:\u003cstrong\u003e\u003ca href=\"..\/..\/..\/rotary-vane--pump.aspx\"\u003e\u003cbr\u003e\u003c\/a\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e10E-2 torr\u003ca href=\"https:\/\/mtixtl.com\/search?q=mechanical+pump\u0026amp;options%5Bprefix%5D=last\" rel=\"noopener\" target=\"_blank\"\u003e\u003cspan\u003e by a mechanical pump\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/mtixtl.com\/search?q=small+turbopump\u0026amp;options%5Bprefix%5D=last\" rel=\"noopener\" target=\"_blank\"\u003e\u003cspan\u003e\u003cspan\u003e10E-5 torr by a small turbopump and \u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/mtixtl.com\/search?q=small+turbopump\u0026amp;options%5Bprefix%5D=last\" rel=\"noopener\" target=\"_blank\"\u003e\u003cspan\u003e10-6 torr by hi-speed turbopump\u003c\/span\u003e\u003c\/a\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003eDescriptions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003e3” flange with various optional pls choose from Product Options )\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003eOne end of the flange has a barbed needle valve, a 1\/4\" feedthrough (the nut is with M15*1.5 thread) for thermocouple inserted, and a 1\/8 NPS valve with an installed \u003ca href=\"cvm60yz\" rel=\"noopener\" target=\"_blank\"\u003eMechanical Pressure Gauge\u003c\/a\u003e. (if you need Compact Digital Vacuum Gauge, please choose from the product option at extra cost. If you don't need a vacuum gauge, please instruct us when you order, we can take it off, but no price deduction )\u003c\/li\u003e\n\u003cli\u003eAnother end of the flange has a KF25 port with a barbed needle valve. You may need\u003ca href=\"kf-valve-d25\" rel=\"noopener\" target=\"_blank\"\u003e\u003cstrong\u003e a KFD25 angle valve \u003c\/strong\u003e\u003c\/a\u003ebefore connecting the vacuum port to the vacuum pump. Please choose the KF25 angle valve at the related product below.\u003c\/li\u003e\n\u003cli\u003eSeal the tube by tightening the screws on the flange without any welding and glue.\u003c\/li\u003e\n\u003cli\u003e1\/4\" in diameter vacuum sealing assembly will connect with a 1\/4\" rubber hose.\u003c\/li\u003e\n\u003cli\u003eDesigned for MTI \u003ca href=\"otf1200xii\" rel=\"noopener\" target=\"_blank\"\u003e\u003cstrong\u003eOTF-1200X Desktop Quartz Tube Furnace.\u003c\/strong\u003e\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eExcellent for any type of tubing: ceramic, glass, quartz, and steel pipe.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cbr\u003e\u003cbr\u003eOptions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cul\u003e\n\u003cli\u003ePlease click here to order a digital vacuum gauge for precision vacuum control up to 10\u003csup\u003e-4\u003c\/sup\u003e torr\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"pgc554ld\" rel=\"noopener\" target=\"_blank\"\u003eFor CVD application, please choose anti-corrosive vacuum gauge ( click pic below left 2 )\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"pgc554ld\" rel=\"noopener\" target=\"_blank\"\u003eYou can choose the various end of fitting as options ( click here to order separately )\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/mtixtl.com\/search?q=Flow+Meter+%28Direct+read+meter+%26+Mass+flow+meter%29\u0026amp;options%5Bprefix%5D=last\" rel=\"noopener\" target=\"_blank\"\u003eYou may click here to order a flowmeter to control gas flowing \u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003eYou may order flange support to avoid tube turning ( pic below right)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0638\/4664\/6008\/files\/vg-tube3.jpg?v=1706307333\" rel=\"noopener\" target=\"_blank\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0638\/4664\/6008\/files\/thumb_vg-tube3_100x100.jpg?v=1706298410\"\u003e\u003c\/a\u003e\u003cspan\u003e       \u003c\/span\u003e\u003ca href=\"https:\/\/mtixtl.com\/products\/pgc554ld\" rel=\"noopener\" target=\"_blank\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0638\/4664\/6008\/files\/1.25_100x100.jpg\"\u003e\u003c\/a\u003e\u003cspan\u003e       \u003c\/span\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0638\/4664\/6008\/files\/Gas_Fittings.jpg?v=1706114626\" rel=\"noopener\" target=\"_blank\"\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0638\/4664\/6008\/files\/Gas_Fittings_100x100.jpg\"\u003e\u003c\/span\u003e\u003c\/a\u003e\u003cspan\u003e     \u003c\/span\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0638\/4664\/6008\/files\/meter_with_flange.jpg?v=1706297779\" rel=\"noopener\" target=\"_blank\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0638\/4664\/6008\/files\/thumb_meter_with_flange_100x100.jpg\"\u003e\u003c\/a\u003e \u003ca href=\"https:\/\/mtixtl.com\/products\/kf40fls\" target=\"_blank\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0638\/4664\/6008\/files\/FlangeSupport_100x100.jpg\"\u003e\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003cbr\u003e\u003cbr\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003eNotes\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cul\u003e\n\u003cli style=\"color: rgb(255, 42, 0);\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003eMust put a refractory tube block in front of the flange (see picture below) to avoid heat radiation melting silicone O-ring. You can order a ceramic block in related products.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"color: rgb(255, 42, 0);\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003ePlease do not over-tighten the three hex screws on the flanges to avoid overpressure incidents. The recommended torque is 35~40 inch-lbs.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"color: rgb(255, 42, 0);\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003eFor liability considerations, MTI does not recommend or endorse the use of any toxic, flammable, or corrosive gasses with our flange assemblies. Please contact us with any concerns.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0638\/4664\/6008\/files\/kit_flange_07274e56-6477-458f-af89-7b2309eb93f6.jpg?v=1742582919\" rel=\"noopener\" target=\"_blank\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0638\/4664\/6008\/files\/kit_flange_07274e56-6477-458f-af89-7b2309eb93f6_100x100.jpg?v=1742582919\"\u003e\u003c\/a\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0638\/4664\/6008\/files\/kit_flange.jpg\" rel=\"noopener\" target=\"_blank\"\u003e\u003c\/a\u003e     \u003ca href=\"https:\/\/mtixtl.com\/search?q=Sealing+flanges+for+40+-+42+mm+O.D+tube\u0026amp;options%5Bprefix%5D=last\" rel=\"noopener\" target=\"_blank\"\u003e\u003cimg alt=\"Sealing flanges for 40 - 42 mm O.D tube\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0638\/4664\/6008\/files\/thumb_1300-flange_100x100.bmp\"\u003e\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\u003ca href=\"https:\/\/mtixtl.com\/search?q=Sealing+flanges+for+40+-+42+mm+O.D+tube\u0026amp;options%5Bprefix%5D=last\" rel=\"noopener\" target=\"_blank\"\u003e click pic to choose other size flanges \u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"MTI","offers":[{"title":"Entire set with Digital Pressure Gauge (D)","offer_id":44985082183819,"sku":"FL76KF25D","price":0.0,"currency_code":"MYR","in_stock":false},{"title":"Entire set with Mechanical Pressure Gauge (M)","offer_id":44985082216587,"sku":"FL76KF25M","price":0.0,"currency_code":"MYR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0716\/4405\/3643\/files\/502final2.1_f1eeb909-7126-4aa1-9ee1-ba3e55420071.jpg?v=1764854078","url":"https:\/\/mtimalaysia.com\/products\/fl-76kf25-ft","provider":"MTI Malaysia \u0026 Indonesia","version":"1.0","type":"link"}