The very low internal volume and precision design of this micrometering (needle) valve make it ideal for use as a gas control valve in chromatographic systems. It is a non-lubricated, dual-outlet model with 1/16" zero dead volume (ZDF) fittings.
This unlubricated version has a highly polished seat designed for use with our pulsed-discharge detectors; it should be used upstream of any ultrapure gas system.
The valve body is Type 303 stainless steel with a Viton® seal that operates at up to 225°C. The valve 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 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.
