Pressure Equalizing Graduated Addition Funnels

Designed for controlled reagent addition in closed-system reactions, the pressure equalizing addition funnel allows solutions to be dispensed into a reaction vessel while maintaining pressure equilibrium, minimizing solvent evaporation, and enabling smooth, controlled dripping. Cylindrical-style addition funnel with pressure-equalizing arm. Available with PTFE or glass stopcock. Top outer and lower inner drip tip standard taper joints are the same size. Funnels with capacities from 10 to 250 mL are equipped with a 2 mm stopcock, while funnels with capacities of 500 mL or greater are equipped with a 4 mm stopcock. Click here for PTFE stopcock replacement parts. Click here for glass stopcock replacement parts.