3-piece filter funnel 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.
Ordering information – 3-piece filter funnel accessories
Dimensions (mm)
Catalog number
Polypropylene plates
PTFE plates
Replacement reservoirs
47
–
1950-114
–
–
70
–
1950-117
1950-207*
1950-217***
90
Functional design Three-piece construction. The funnel is quickly dismantled, ready for the insertion of a new filter. The glass sealing flanges of the funnel and reservoir are ground flat to ensure a good filter seal.
Positive filter clamping All 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.
Simple to clean The parts can be quickly and efficiently cleaned because of the simplicity of the design.
A choice of plates For quick and easy filtration, Whatman 3-piece filter funnels are available with a choice of plates. They also come in several sizes to match your needs. • Acrylic plate: 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 temperature. Suitable for most alcohols, glycols, ethers, and ketones. Maximum working temperature 100°C. • PTFE plate: Optional extra. For virtually all common acids, alkalis and solvents at temperatures up to 100°C. Maximum working temperature 200°C.
