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 is available to fit each size of the filter flask.

GW-74 1,000ml 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 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.

Features:

• ASTM and AASHTO compliant
• Thick-walled Pyrex® glass with side tabulation for convenience

Included Items:

• Filter Flask (1,000, 2,000, or 4,000ml)

Accessories:

• Indicating Drierite silica-gel desiccant crystals absorb vapor from air and gases. Changes color when saturated and can be regenerated
• Neoprene Stoppers w/ Glass Tube can be used with filter flasks to create a moisture trap
• Neoprene Stoppers are available in multiple sizes for filter flasks and some graduated cylinders

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