We offer valves for so many applications and in so many sizes, materials, and specialized port configurations that the choices may at first seem daunting. You can always contact our technical support staff to discuss your specific needs and get a recommendation on the best injector or valve for your application. Here online, we can walk you through a step-by step process or provide you with a printable flowchart.
Which valve do I need?
Use our interactive valve selector to arrive at the best solution for your specific needs.
- Or, download a printable valve selection flowchart:
| Read about: | Cheminert | Valco | Diaphragm |
| Nanovolume UHPLC (≤20 K psi) HPLC (≤5 K psi) Low pressure OEM |
GC HPLC (≤5 K psi) Selectors |
Internal sample injectors Sampling/switching valves |
Cheminert injectors, valves, and selectors
Cheminert – Nanovolume™
With uniform 100 and 150 micron flowpaths, Cheminert Nanovolume™ injectors and switching valves are ideal for high speed, high throughput techniques which demand a valve and fitting system that minimize internal volume and eliminate dead volume. Specially designed fittings accommodate fused silica capillary, 1/32" PEEK, or Valco electroformed nickel tubing. Available with pressure ratings of 5,000 psi, 10,000 psi, 15,000 psi, or 20,000 psi.
Cheminert – UHPLC
Cheminert UHPLC injectors, switching valves, and selectors are ideal for high speed, high throughput techniques which demand a valve and fitting system that minimize internal volume and eliminate dead volume.
A proprietary rotor material and stator coating on some models achieve pressures to 20,000 psi, suitable for the most demanding analytical techniques. All models are compatible with any VICI actuation option.
Cheminert – HPLC
The standard line of Cheminert flat plate valves for HPLC includes 4, 6, 8, and 10 port versions plus a through-the-handle front-loading injector and a continuous flow injector. Also available is a submicroliter injector with injection volume down to 4 nanoliters. Valves feature 1/32" or 1/16" zero dead volume fittings with bore sizes from 0.10 mm (.004") to 0.75 mm (.030"). Most models are available in manual, air, or electrically actuated versions.
Cheminert – Low pressure
Cheminert's low pressure flat plate two position design offers 4, 6, 8, or 10 port configurations. This low pressure design features a choice of Valco 1/16" zero dead volume fittings or 1/4-28 Cheminert internal fittings for 1/16" or 1/8" OD tubing. Selectors are also available with 1/2-20 fittings and .180" ports. All models are available in manual, air, or electrically actuated versions.
Cheminert – OEM
Our integrated motor/injector and motor/selector are compact assemblies specifically designed to be built into an OEM system. Using the well-proven Cheminert valve design and the 24 volt motor from our popular microelectric actuators, they need only to be connected to an instrument's power supply.
We also offer a vertical port injector and an injector with the syringe port centered on the face of the valve opposite the actuator, allowing convenient syringe insertion when the valve and actuator are mounted inside an instrument.
Valco injectors, valves, and selectors
Valco – GC injectors and valves
For over 40 years Valco valves have been the industry standard in gas chromatography. Models are available with 3, 4, 6, 8, 10, 12, or 14 ports, with 1/32", 1/16", 1/8", or 1/4" fittings, and with bore sizes from 0.25 mm (.010") to 4 mm (.156"). In addition, Valco valves offer the widest range of rotor and body materials of any valve available, with alloys and polymer composites capable of meeting virtually any system requirement. All models can be ordered in manual, pneumatic, or electrically actuated versions.
Valco – HPLC injectors / valves
A pioneer and industry leader in products for HPLC, Valco continues to offer the market's most diverse line in terms of options for number of ports, fitting sizes, materials of construction, and actuation. 3, 4, 6, 8, 10, 12 port versions are offered, with 1/32", 1/16", or 1/8" fittings. As with the GC line, Valco valves offer the widest range of rotor and body materials of any valves available, with alloys and polymer composites capable of meeting virtually any system requirement. All models can be ordered in manual, pneumatic, or electrically actuated versions.
Valco – selectors
One inherent benefit of the Valco conical rotary design is that it allows multiple planes of ports, facilitating a variety of unique multiposition configurations useful for stream selection, column selection, or trapping. Versions are available for GC and HPLC applications, with 1/16", 1/8", or 1/4" fittings, with bore sizes from 0.40 to 4.0 mm (.016" to .156"). Valco selectors are available for up to 16 streams (34 ports), with all of Valco's trademark flexibility in terms of actuation and material options.
Diaphragm valves
Diaphragm injectors and sampling/switching valves
The VICI diaphragm valve is designed for trouble-free use in applications requiring minimal maintenance and maximum lifetime, making it an ideal choice for the process industry, automated lab analyzers, or continuous-monitoring environmental analyses.
