Micrometering (Needle) Valves

Micrometering needle valves
Micrometering (needle) valves
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Micrometering (needle) valves combine the ease of connection associated with Valco zero dead volume fittings with convenient bulkhead mounting. The very low internal volume and precision design make this valve ideal for use as a gas control valve in chromatographic systems. Dual outlet versions eliminate the need for a tee in some applications.

The Viton® model is rated at 225°C, while a version with Kalrez™ seals is capable of continuous operation at 315°C. This allows a needle valve to 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 maximum of 1000 psi gas, and individually tested on a mass spectrometer leak detector to a helium leak rate specification of < 1 x 10-8 atm cc/sec.

Dual outlet needle valve

The standard model has 1/16" Valco ZDV fittings with one or two outlets. There is also a single-outlet version with 1/16" x 18" tubes.

Select a model below to view product numbers.

1/16" Valco ZDV fittings

Single outlet
Dual outlet

1/16" OD x 18" tubes

Single outlet

Single outlet needle valves with 1/16" Valco ZDV fittings

Seal Lubrication Product No.
Standard: 2-225 ml/min @ 15 psi N2 inlet
Viton Lubricated ZBNV1
Viton Non-lubricated ZBNV1-D
Kalrez Non-lubricated ZBNV1-KZ
Fine control: 2-175 ml/min @ 15 psi N2 inlet
Viton Lubricated ZBNV1F
Viton Non-lubricated ZBNV1F-D
Kalrez Non-lubricated ZBNV1F-KZ
Low flow: 2-90 ml/min @ 40 psi N2 inlet
Viton Lubricated ZBNV1LF
Viton Non-lubricated ZBNV1LF-D
Kalrez Non-lubricated ZBNV1LF-KZ

Dual outlet needle valves with 1/16" Valco ZDV fittings

Seal Lubrication Product No.
Standard: 2-225 ml/min @ 15 psi N2 inlet
Viton Lubricated ZBNV1-2
Viton Non-lubricated ZBNV1-D-2
Kalrez Non-lubricated ZBNV1-KZ-2
Fine control: 2-175 ml/min @ 15 psi N2 inlet
Viton Lubricated ZBNV1F-2
Viton Non-lubricated ZBNV1F-D-2
Kalrez Non-lubricated ZBNV1F-KZ-2
Low flow: 2-90 ml/min @ 40 psi N2 inlet
Viton Lubricated ZBNV1LF-2
Viton Non-lubricated ZBNV1LF-D-2
Kalrez Non-lubricated ZBNV1LF-KZ-2

Single outlet needle valves with 1/16" x 18" tubes

Seal Lubrication Product No.
Fine control: 2-175 ml/min @ 15 psi N2 inlet
Viton Lubricated BNV1
Viton Non-lubricated BNV1-D
Kalrez Non-lubricated BNV1-KZ
Low flow: 2-90 ml/min @ 40 psi N2 inlet
Viton Lubricated BNV1LF
Viton Non-lubricated BNV1LF-D
Kalrez Non-lubricated BNV1LF-KZ

TECH TIP

The unlubricated versions with a specially polished seat were designed to be used with our pulsed discharge detectors, and should be used upstream of any ultrapure gas system.

OPTIONS

It is possible to provide as many as six outlet ports. Contact us for more information.

MORE INFORMATION