Daisy Sol Val

Solenoid valves are the namesake components of the Daisy Sol Val. Specifically, this instrument uses 8 LFN series, isolation style, 2-way normally closed solenoid valves from Lee Company (Connecticut, USA). The valves contain a diaphragm seal made out of a chemically inert elastomer (EPDM) that isolates and protects the valve’s inner parts from the fluid. Each valve is 100% functionally tested by the factory to ensure optimal and reliable switching performance. In fact, these valves are regularly used in medical, biotechnology and scientific measurement and research instrumentation, owing to their reliability and consistent performance.

The LFN series solenoid valves feature zero dead volume and only 9 μl of internal volume that is readily and easily flushable without any retention. They can operate at pressures from vacuum to 30 psig. The maximum flow rate through these valves before they can no longer fully close (above 30 psi differential pressure) is 165 ml/min. Therefore, the Daisy Sol Val is recommended for low to moderate flow speed applications (typically under 100 ml/min).

The valves can switch in as little as 20 ms, but increasing pressures within the valve body may impact its dynamics. Daisy Sol Val is designed for moderate-speed (e.g., a few Hz) switching. We will be offering separate modules for specialized high-speed applications (such as nanoliter dispensing) in the very near future.

The valve heads, as well as the flow manifold itself, are precision manufactured out of PEEK, which is highly chemically compatible with a wide variety of aqueous and organic solutions. Check out the Chemical Compatibility section for more information on both wetted materials (PEEK and EPDM).

The manifold is designed to house 8 channels along a common port line. Whenever a given valve opens up, it is connected to the common channel, allowing fluid to flow between the side port and the common port(s). In one typical application, the user would select from a multitude of input samples, and direct that stream through the common port into a target vessel or flow channel via a pump downstream. The reverse is also possible, with the target stream being directed to different output locations via an upstream pump. It is possible to chain multiple Daisy Sol Val modules to create any custom flow network needed.

Plug all unused ports with our special port plugs.

For applications that require a different topology — such as 2-way or 3-way isolated ports without a common channel, we can offer alternative and custom manifold configurations with the Daisy Sol Val. Simply reach out to us with your custom request before your order.