Manual Sampling/Switching Valves

Sampling valves and/or column switching valves can make a GC system much more versatile. Adding multi-port valves will enable an instrument to perform analyses that call for switching columns, reversing the elution sequence of sample components, selecting between two columns to a single detector, and the analyses of gas samples through a sample loop. These valves also eliminate pressure surges and improve sample-to-sample reproducibility of peak separations. We offer manual sampling and switching valves manufactured by Valco.

These precision valves utilize zero volume fittings that allow connections to be made directly to the valve, minimizing dead volume for on-column injections, and adapt easily to any type of tubing. Valve bodies are made of 303 grade stainless steel, and use PTFE-filled rotors. Each valve includes the complete valve, zero volume nuts, a mounting bracket, and a 3 in. handle.

4-Port Sampling and Switching Valve

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22914 4-Port Sampling and Switching Valve fitting size 1/8 in., maximum temperature 300 °C
22975 4-Port Sampling and Switching Valve fitting size 1/8 in., maximum temperature 175 °C
22941 4-Port Sampling and Switching Valve fitting size 1/16 in., maximum temperature 300 °C

6-Port Sampling and Switching Valve

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22915 6-Port Sampling and Switching Valve fitting size 1/8 in., maximum temperature 300 °C
22977 6-Port Sampling and Switching Valve fitting size 1/8 in., maximum temperature 175 °C
22950 6-Port Sampling and Switching Valve fitting size 1/16 in., maximum temperature 300 °C
22976 6-Port Sampling and Switching Valve fitting size 1/16 in., maximum temperature 175 °C

8-Port Sampling and Switching Valve

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22916 8-Port Sampling and Switching Valve fitting size 1/8 in., maximum temperature 300 °C

10-Port Sampling and Switching Valve

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22981 10-Port Sampling and Switching Valve fitting size 1/8 in., maximum temperature 175 °C

Sample Loops for Gas Sampling

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22651 Sample Loop for Gas Sampling loop volume 5.0 mL, fitting size 1/8 in., number of ports, 10
22635 Sample Loop for Gas Sampling loop volume 5.0 mL, fitting size 1/8 in., number of ports, 6
22633 Sample Loop for Gas Sampling loop volume 0.5 mL, fitting size 1/8 in., number of ports, 6
22628 Sample Loop for Gas Sampling loop volume 0.25 mL, fitting size 1/16 in., number of ports, 6