Filter Flasks

Filter Flasks are thick-walled Pyrex® glass and have side tubulation for 3/8in (9.5mm) ID 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 with Glass Tube are 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. GW-74 uses a No.8 Stopper or No.8 Stopper with Glass Tube.

GW-75 2,000mL Flask meets ASTM and AASHTO vacuum container capacity requirements when used as a pycnometer. GW-75 uses a No.9 Stopper or No.9 Stopper with 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. GW-76 uses a No.12 Stopper or No.12 Stopper with Glass Tube.

Features:

• ASTM and AASHTO compliant
• Thick-walled Pyrex® glass with side tubulation 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 with 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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