VICI injectors and valves

Injectors and valves - descriptions
Valco injectors and valves
	GC HPLC and prep HPLC Multiposition valves (Low and high pressure) List of all Valco models
Cheminert injectors and valves
	LC and FIA HPLC, microbore HPLC, and prep HPLC Multiposition valves (Low and high pressure) List of all Cheminert models
Diaphragm valves
	A new miniaturized diaphragm valve design with typical lifetime as high as 1,000,000 cycles. Ideal for process GC.
More about valves
	Applications How to select the right injector or valve Valve comparison chart

Valve descriptions

Valco injectors and valves for GC

Applications
For 30 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.

Microvolume sample injectors

Sampling and switching valves

Medium temp

High temp

Valco injectors and valves for HPLC and prep HPLC

Applications
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. 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.

Microvolume sample injectors

Injectors and switching valves

Analytical and microbore

Prep HPLC

Valco multiposition valves

Applications
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"). Multiposition valves are available for up to 16 streams (34 ports), with all of Valco's trademark flexibility in terms of actuation and material options.

Multiposition valves

Cheminert injectors and valves for HPLC

Applications
In addition to standard 4, 6, 8, and 10 port versions, the Cheminert line of flat plate valves for HPLC features a through-the-handle injector and a rear-loading injector with a stationary centered injection port designed for use with autosamplers. Also available is a submicroliter injector with the world's smallest injection volume, just 20 nanoliters. Valves feature 1/16" zero dead volume fittings with bore sizes from 0.15 mm (.006") to 0.75 mm (.030"). Most models are available in manual, air, or electrically actuated versions.

C1 - through the handle injector

C2 - analytical, microbore, and prep valves

C2XL - extended life injectors

C3 - centered port injector

C4 - microvolume sample injector

Cheminert injectors and valves for LC and FIA
Applications
Cheminert's flat plate two position design offers 4, 6, 8, or 10 port configurations. The latest design features internal fittings instead of tubes, with 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. All models are available in manual, air, or electrically actuated versions.

C22Z - valves with Valco ZDV fittings
C22 - valves with 1/4-28 fittings
C24Z - microvolume sample injectors with Valco ZDV fittings
C24 - microvolume sample injectors with 1/4-28 fittings

Cheminert multiposition valves
Applications
The rotary flat plate design allows 4, 6, 8, 10, 14, 20, 24, or 26 position stream selection valves, in high pressure and low pressure models. A variety of configurations are available with bore sizes from 0.25 mm (.010") for HPLC column selectors up to 4.6 mm (.180") for applications requiring minimal restriction across the valve. Metal or all-polymeric valves can be ordered, with models available in manual, pneumatic, or electrically actuated versions.

High pressure
C5 - HPLC stream selector
HPLC column selector

Low pressure

C25Z with Valco ZDV fittings (4-10 positions)
C35Z with Valco ZDV fittings (20-26 positions)
C25 with 1/4-28 fittings
C45 with 1/2-20 fittings

Diaphragm valves for GC
Applications
A diaphragm valve consists of plungers and ports arranged in a circular pattern, with the plungers controlled by the reciprocating action of two air actuated pistons. Extremely long lifetime (typically 1,000,000 cycles at ambient temperature; approximately 500,000 cycles at elevated temperatures), very short actuation time (10 milliseconds), minimum internal dead volume, and reliability have made this type of valve very successful in process gas chromatography for both sample injection and column switching. Our new miniature version features 1/16" or 1/32" zero dead volume fittings, and is the first to offer a 10 port configuration in addition to the 6 port and internal sample 4 port models.

Diaphragm valves

Further reference
Applications
How to select the right injector or valve
Valve comparison chart