This is a pair of smart sealing assembly for tube vacuum furnace to tighten both ends of OD 114 - 115 mm (4,5") diameter tube without any welding and gluing.

SPECIFICATIONS

Package included	One flange with gauge and valve, one flange with valve, two steel sealing rings, four high-temperature silicone O-rings ( 300°C Max., and six screws)
Vacuum Level	10E-2 torr by a mechanical pump 10E-5 torr by a small turbopump and 10-6 torr by hi-speed turbopump
Features	Made of Stainless Steel with double high-temperature silicon O-rings on each flange. On one end the flange has a vacuum meter with valve, and on the other end has valve. Seal tube by tightening screws on the flange without any welding and glue. 1/4" hose connector in the both of ends. 1/4" in diameter vacuum sealing assembly will connect with 1/4" rubber hose. Excellent for any type of tubing: ceramic, glass, quartz and steel pipe. The assembly kit will seal 114 mm diameter (4.5" dia. OD) ceramic and quartz tube.
Optional Parts	Please click here to order digital vacuum gauge for precision vacuum control upto 10-4 torr ( Pic. 1) You can choose the various end of fitting as options ( click here to order separately  ( Pic. 2) Pls click Pic3 to order Compact Direct Read Flow Meter, 6-100 cc/min. with 1/4 NPS male fitting -FM-100CC Pic. 1 Pic. 2  Pic. 3
Warning	Must put a refractory tube block in front of the flange (see picture below) to avoid heat radiation melt silicone O-ring. You may 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.
Options	Click here to choose flange for tube from 1" to 11"                              Vacuum Pump & High Vacuum Station