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. 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. Also available is a submicroliter injector with the world's smallest injection volume, just 20 nanoliters. Most models are available in manual, air, or electrically actuated versions.
All models are available in manual, air, or electrically actuated versions.
Metal or all-polymeric valves can be ordered, with models available in manual, pneumatic, or electrically actuated versions. 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.