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Right side flange with KF-25 port& 1/4" barbed hose fitting for 2" Tube - EQ-FL-50KF25-FT(R)

In stock
Item Number: EQ-FL-50KF25-FTR

Quantity Discounts

2 to 5USD$369.55
6 to 9USD$350.10
10 or moreUSD$330.65

This is the right side of the smart sealing assembly for 2" vacuum tube furnace to seal one end of OD 50-52 mm ( 2")  tube without any welding and gluing.



  • 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-5 torr by molecular pump and 10E-2 torr by mechanical pump

2” flange with various optional (please choose from Product Options)
  • One end of the flange has a barbed needle valve,1/4" feedthrough for thermocouple inserted and 1/8 NPS valve with installed  Mechanical Pressure Gauge. (if you need  Compact Digital Vacuum Gauge , please choose from product option at extra cost . If you don't need 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 barbed needle valve. You may need KFD25 angle valve before connecting the vacuum port to vacuum pump. Please choose the KF25 angle valve at related product below.
  • Seal tube by tightening screws on the flange without any welding and glue.
  • 1/4" in diameter vacuum sealing assembly will connect with 1/4" rubber hose.
  • Designed for MTI OTF-1200Desktop Quartz Tube Furnace.
  • Excellent for any type of tubing: ceramic, glass, quartz and steel pipe.

Installation Video

  Click to enlarge

  • Must put a refractory tube block in front of the flange (see picture below) to avoid heat radiation melt silicone O-ring. You 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 gases with our flange assemblies. Please contact us with any concerns.

Application Notes
Click here to order other size  vacuum flange.                 click pic to order KF40 to KF25  adaptor if you need KF40 port

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2. We may add extra charges for paper order and net30 terms due to extra labor cost.
3. The prices listed are subject to change without notice.