The very low internal volume and precision design of this micrometering needle valve makes it ideal for use as a gas control valve in chromatographic systems. It is a non-lubricated, single-outlet model with 1/16" fittings.
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
The valve is Hastelloy C with a Kalrez™ seal capable of continuous operation at 315°C. This allows a needle valve to be mounted directly within a heated oven.
It offers low-flow control between 2-90 ml/min at 40 psi (N2). 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.
NOTE: These valves are not designed for complete flow shut-off. If a positive shut-off is required, we recommend a Valco combo valve, designed with a separate knob to shut off the flow without affecting the flow-rate setting.
