Cap GL45 Preparative (1x NPT 1/8, 2x UNF 1/4") Screw cap GL 45 made of PPS yellow, insert made of PTFE with 1 capillary connection (UNF 1/4) and 1 connection for tubing (NPT 1/8"). Including 1 air valve with service life indicator, 1 fitting for tubing O.D. 3,2 mm (PFA-yellow), 1 fitting for tubing O.D. 6,35 mm (PTFE-white).

Applications
Adapted to the requirements in preparative HPLC. Tubing with O.D. 4.0 up to 6,35 mm can be inserted onto the ground of the bottle by means of the b.safe Fittings Preparative made of PTFE. The conical seal cone clamps the tubing and seals the connection safely. The b.safe Air Valve is especially adapted to the flow rate in HPLC. The integrated non-return valve avoids evaporation of solvents and lets flow ambient air into the bottle in case of vacuum. The upstream porous PTFE membrane restrains pollutant particles and other contaminations from outside. The 6 months service life of the filter can be easily monitored through either activating the display on the cap and exchanging the valve in case of completely red colouring or documentation of the exchange date by hand and clip in the display at the valve.