Hamilton Modular Valve Positioners are self-contained, bidirectional valve positioners used for fluid selection and redirection. There are two models to choose from, digital or RS-232 serial, depending on your communication preference for the unit. Both models offer valves with 13 standard fluid paths. A built-in indicator and encoder-regulated DC stepper motor ensure both versions deliver accurate valve port alignment and location for optimum fluid delivery precision.

Choosing the right model

The digital Modular Valve Positioner is controlled by equipment that has transistor-transistor logic, also known as TTL, or switch closure outputs

The serial Modular Valve Positioner is designed for applications that can utilize RS-232 serial communication. The serial protocol provides better error handling and diagnostics that are especially helpful in critical applications. With serial command, up to 16 serial Modular Valve Positioners can be connected via a daisy chain. This model can be programmed using simple ASCII commands.

Both the digital and serial Modular Valve Positioners offer an optional cover. Units with a cover are typically used when the positioner is sitting on a bench top or needs to be better protected from fumes or harsh chemicals while the non-covered version is meant for internal integration into higher-level equipment.

Valve options and other product features

Hamilton Modular Valve Positioners are exceptionally easy to service and modify. It is very simple to remove and replace their snap-in valves with other configurations to achieve different fluid delivery with the same positioner unit, maximizing flexibility and value. You can choose from valves with two to eight ports that offer a total of 15 different flow paths. Valves are available with chemically inert PTFE and CTFE, or ceramic flow paths and can be customized per your requirements.

The Modular Valve Positioner works with all PSD syringe pumps but is especially compatible with the PSD/2 and PSD/3. The PSD/2 and PSD/3 can be used in a daisy chain with the Modular Valve Positioner because they can be controlled by the same RS-232 communication protocol.