VACUUM & AIRLESS
366
Inlets
Airless-ware® is a family of ground-jointed glassware designed for the manipulation of air-sensitive compounds on a medium to large scale, using an inert gas to exclude air or moisture vapors. The essential feature of most of the Airless-ware® apparatus is a sidearm fitted with a stopcock. Through this sidearm the apparatus is evacuated to eliminate air and an inert gas is introduced. A high vacuum is not necessary because the purge cycle is repeated several times. For example, suppose an initial evacuation of 2 mm pressure; after the second pumping and filling, the pressure of residual air is 2 x 2/760 mm, and after the third cycle it is 2 x (2/760)2 mm, or approximately 10-5 mm of residual air. Due to the frequency with which these purging cycles are performed, it is useful to have a 216060 manifold equipped with a series of vacuum valves. Attached to this manifold is a source of purified nitrogen or argon and a source of vacuum. The source of vacuum should be a mechanical vacuum pump. The pump should be protected by a dry ice-cooled or liquid nitrogen-cooled trap. A 926050 size 25 vacuum trap would serve this purpose. This trap must have a relatively large volume and be easily removed from the system since considerable quantities of condensables are accumulated at this point. For moderately air sensitive materials, the solvent may be purged with an inert gas stream prior to use.
Balloon Type Inlet Adapters This gas balloon type adapter is used for protective storage in jointed vessels. The inert gas tubing may be disconnected, giving the vessel its own portable inert gas source to balance volume changes caused by sample removal • Supplied without the balloon • Replacement retainer is 809000-0022 • • Manufactured from 33 expansion, low extractable borosilicate glass conforming to USP Type I and ASTM E438, Type I, Class A requirements One arm of the T-bore stopcock is connected to the inert gas source. The arm with a hose connector is connected to a balloon. Vessels connected to this adapter may be flushed and filled with inert gas. The balloon can be expanded with inert gas for storage at the same time or separately. The stopcock bore is then rotated to connect the balloon to the vessel.
Inlet Adapters with Septum This gas inlet adapter has a standard taper joint.
• Sidearm has a 2 mm bore 821001 PTFE stopcock with a port for gas introduction and a rubber-stoppered port on the top tube for syringe retrieval • Supplied complete with one 882311 septum stopper • Manufactured from 33 expansion, low extractable borosilicate glass conforming to USP Type I and ASTM E438, Type I, Class A requirements Part Number Standard Taper Joints
Case Qty
211275-1420 211275-2440
14/20 24/40
1 1
Standard Taper Joints
Fits Tubing ID (inches)
Part Number
Case Qty
211250-1420 211250-2440
14/20 24/40
0.25 0.25
1 1
Replacement Parts
Part Number
Description
Case Qty
Replacement Parts
Size 2 mm Straight Bore Stopcock Plug, PTFE, 11/25 mm Plug Size Sleeved septum stopper with off-center hole
821001-0002
1
Part Number
Description
Case Qty
Size 22 Stopcock Plug Retainer, Fits Plug Sizes (mm) 16.2/56, 17.35/50, 17/40, 15/35, O-Ring Size 207
882311-0000
144
809000-0022
1
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