The increased use of high-efficiency glass microfiber filters in modern laboratories has created a demand for simple and effective filter-holding systems. Whatman 3-piece filter funnels have been designed to complement the range of Whatman fine particle retention, rapid flow rate glass microfiber filters.
Three-piece construction; funnel is quickly dismantled for insertion of a new filter
Glass sealing flanges are ground flat to ensure a good filter seal
Retained solids are deposited within the filter circle
Edge clamping prevents peripheral loss and possible passage of solution around, rather than through, the filter circle
Parts can be quickly and efficiently cleaned
Choice of Three Plates
Acrylic - Supplied as standard; suitable for filtration of most aqueous solutions; maximum working temperature 65°C
Polypropylene Plate - Optional extra. Recommended for most acids (except concentrated nitric acid and fuming sulfuric acid) at room temperatures; suitable also for most alcohols, glycols, ethers and ketones; maximum working temperature 100°C
PTFE - For virtually all common acids, alkalis and solvents at temperatures up to 100°C; maximum working temperature 200°C
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