|The basic Cheminert design involves a flat rotor which is engraved with slots which connect the ports. A stator is held at a constant, preset force against the rotor. When repairs are required, all that is necessary for rotor access is the removal of two or three screws. Remove the old rotor and replace it, put the screws back in and tighten them, and the valve is ready for use at the factory-set pressure specification. No adjustments are possible, much less required. Other advantages of the design include easy panel mounting, low actuating torque, and compact size. The flat plate design offers flow paths for basic flow switching, sample injection, and stream selection up to 10 positions (26 positions in some models). Two position valve descriptions, product numbers, and prices begin on the next page. For information on multiposition valves.|
HPLC models have stators of Nitronic 60 stainless steel, PAEK, Hastelloy C, or titanium, all of which are compatible with common HPLC solvents. Valcon H rotors are used with metal stators, and Valcon E with PAEK. Low pressure models have PPS stators and rotors of Valcon E2, a proprietary reinforced PTFE composite.
Metal valves are supplied with stainless nuts, with ferrules of the same material as the stator. Fittings for polymeric valves vary with the valve design.
Pressure ratings from
100 psi to 20,000 psi
Inert, biocompatible construction
Easy field service
Automated operation - pneumatic or electric
4, 6, 8, and 10 port and internal sample two position models
Multiposition stream selection versions with up to 26 positions
|Model C2XH and Model C4XH Cheminert's Model C2XH is uniquely suited for applications up to 10,000 psi liquid. The R&D 100 Award-winning design incorporates a dynamic sealing system that provides the force necessary to seal up to the maximum pressure limit. Seal force decreases proportionately as system pressure decreases, extending valve lifetime.|
C2XH is available in 4, 6, and 10 port versions;
Model C4XH is an internal sample configuration for injection of samples as small as 10 nanoliters.
valves can be used as injectors or
switching valves. Choose from 4, 6, 8, or 10 port versions. (6 port valves
include a sample loop).
Model C4 is an equivalent internal volume sample injector,with sample sizes ranging from.01 to.5 µI. C2 and C4valves are compatible with all VICI actuation options, with position feedbackavailable for manual valves.
|Anwendungsbeispiele für Cheminert Ventile|
|Model C1 is a through-the-handle (front-loading) injector designed for direct replacement of existing competitive models. Because the handle is integral to the design, all Model C1 injectors are manual, with position feedback standard.|
|Model C2V is designed specifically for use in an autosampler. It is like the standard C2 except that the sample port is perpendicular to the valve axis. This permits the valve and actuator to be installed horizontally, while the syringe loads the injector vertically. Semi-Preparative HPLC Model C2 valves are also available with flow passages optimized for semi-preparative HPLC. Choose from 4, 6, 8, or 10 port versions. (6 port valves include a sample loop).|
|Model C3 is a unique injector with a syringe injection port centered on the rear face of the valve (opposite the handle or actuator), allowing convenient syringe insertion when the valve is mounted on an actuator inside an instrument.|
|Sample loops for C1; C2; C2V and C3 valves|
|Model C22Z is a conventional two position sample injector and switching valve, with 4, 6, 8, or 10 ports. Sample injection requires a loop, ordered separately.|
|Model C24Z is an internal sample injector, for applications in which the sample size is smaller than that of any available external loop. Sample sizes available are 0.2, 0.5, and 1µl.|
|Model C22 valves are used for sample injection or switching. (Functionally equivalent to Model C22Z.) Sample injection requires a loop, ordered separately.|
|Model C24 is an internal sample injector like the C24Z, available with 0.2, 0.5, or 1 pi sample size.|
With Cheminert 1/2-20 Fittings
With a bore of .180" (4.6mm) and connections for 1/4" OD tubing, the Cheminert Model C42 is perfect for viscous liquid sampling and switching and for applications where low pressure-drop is essential. The multiposition C45 selector valves have proven to be an excellent product line, so the addition of the two position C42 should make easy work of low pressure, high flow applications.