Vacuum Sealing Assembly for 3" Tube w/ KF-25 Port & 1/4" Feedthrough - EQ-FL-76KF25-FT (D/M)

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 ( 300oC 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)
Installation Video
Dimensions	Click to enlarge
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