This micrometering needle valve is rated at 225° C and uses a Viton® seal. It provides fine control between 2-175 ml/min at 15 psig Nitrogen (inlet), and comes with two fixed 18” tubes (1/16” OD). Needle valves combine the ease of connection associated with VICI zero dead volume fittings with convenient bulkhead mounting.
This unlubricated version has a highly polished seat that was designed to be used with our pulsed discharge detectors; it should be used upstream of any ultrapure gas system.
Very low internal volume and precision design make this valve ideal for use as a gas control valve in chromatographic systems. Needle valves can be mounted directly within a heated oven, facilitating control of flow switching in multidimensional systems while keeping the gases at oven temperature.
Valves are rated for a maximum of 1000 psig. They are individually tested on a mass spectrometer leak detector to a helium leak rate specification of < 1 x 10-8 atm cc/sec.
