Our online catalog is being updated! Please contact us for current pricing. QAD Series Quick Access Doors Thermionics manufactures a full line of high vacuum doors. These are designed for use in load lock systems and other applications requiring ease and speed of access where a Viton® gasket seal to atmosphere is acceptable. Our design incorporates a number of features which ensure a long, trouble-free life. Available as a bolt-on or weld-on, the user has the option of constructing a permanent or adaptable assembly. The bolt-on "F" Series design mates to the system via a standard ConFlat-type flange. The weld-on "T" Series can be welded to a standard O.D. tube on a chamber. Features Captured Viton® gasket (with gasket pumpout). Swing-away clamp design with hand-operated knob for speed and ease of operation. No parts are removed during use. Axial force is applied to door for uniform sealing pressure. Extra rugged construction.     Ordering Information -- Quick Access Doors Mounting Dimensions   Flange O.D. Tube O.D. A B C Model No. Price 2.75" -- Use Quick Access Caps QAD-275-F Consult Factory 4.5" -- QAD-450-F 6" -- 3.63" 4.38" 1.88" QAD-600-F $815. 8" -- 4.68" 5.43" 1.98" QAD-800-F $955. 10" -- 5.71" 6.40" 2.19" QAD-1000-F $1,195. -- 4" 3.69" 4.38" 1.45" QAD-600-T $795. -- 6" 4.75" 5.43" 1.52" QAD-800-T $925. -- 8" 5.71" 6.40" 1.73" QAD-1000-T $1,160. Options /DW Door Windows Consult factory Quick Access Caps are manufactured and protected under one or more of the following patents: Patent No. 5,228,587