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Filter Flasks Filter Flasks are thick-walled Pyrex® glass and have side tubulation for .375in (9.5mm) I.D. vacuum tubing. When used in conjunction with Indicating Drierite Granules filter flasks can be used as a moisture trap for vacuum pump protection. Neoprene Stoppers and Neoprene Stoppers w/ Glass Tube are available to fit each size of the filter flask.
GW-74 1,000ml Filter Flask is most commonly used as a moisture trap due to its manageable size. The GW-74 uses a No. 8 Stopper or No. 8 Stopper w/ Glass Tube.
GW-75 2,000ml Filter Flask meets ASTM and AASHTO vacuum container capacity requirements when used as a pycnometer. The GW-75 uses a No. 9 Stopper or No. 9 Stopper w/ Glass Tube.
GW-76 4,000ml Flask also meets ASTM and AASHTO standards specifications for use as a vacuum container for weighing in the air only. The GW-76 uses a No. 12 Stopper or No. 12 Stopper w/ Glass Tube.
GW-74: 1,000ml, graduated
GW-75: 2,000ml, graduated
GW-76: 4,000ml, graduated
GW-74: 5.39 x 9.37in (137 x 238mm) dia. x H
GW-75: 6.61 x 11.5in (168 x 292mm) dia. x H
GW-76: 7.8 x 14.02in (198 x 356mm) dia. x H
GW-74: 3.0lb (1.36kg)
GW-75: 3.0lb (1.36kg)
GW-76: 6.0lb (2.72kg)
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