Critical flow controls just got easier, more efficient and cheaper

28 Jan 2021
Ellen Simms
Product and Reviews Editor

A new internal pinch-tube solenoid valve, promising outstanding reliability and an exceptionally low carry-over volume of just 3.7 µL and low overall internal volume of just 11 µL in critical flow applications has been introduced by miniature component specialists The Lee Company.

The ground-breaking Xover™ solenoid valve is designed to switch quickly and efficiently between samples, reagents, cleaning solutions or calibrants, so is ideal for applications in flow cytometry, gene sequencing, in-vitro diagnostics, urinalysis and hematology instruments.

The Xover valve features a Y-shaped elastomer tube in a 3-way configuration representing an innovative design which combines the flow path of a pinch valve with the versatility and maintenance-free performance of a chemically inert isolation valve. This means it’s easily flushed, ensures fast, efficient fluidic performance with lower power consumption (2.1 W) and at a lower overall cost.

The valve can be connected to ¼-28 flat bottom tubing assemblies or the ports can be configured to meet the specific requirements of the application. Also, mounting holes for easy integration and an electrical connector with secondary retention contribute toward ease-of-installation and improved system reliability. These benefits, along with their construction using durable, chemically inert wetted materials such as PEEK and FKM (treated) using the very latest manufacturing techniques, all help to ensure long and reliable maintenance-free operation.

Industries and applications where the Xover valve will be appreciated include scientific instrumentation, drug discovery, analytical chemistry, medical, pharmaceutical and also OEM / engineering fluidic applications where low internal and zero-dead volume and inert materials are critical to system integrity and performance.

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IEP Series Solenoid Valves

Lee Products Ltd.

The Lee IEP Series valves are 2-way, extended performance, axial-flow solenoid operated valves. These are designed for high pressure and high temperature applications where small size and lightweight are critical factors. The IEP Series valves are supplied with 1/16" inlet and outlet stainless steel tubing. This allows the valve to be connected using standard high pressure chromatography fittings or welded directly in place. Two temperatures ranges Standard: 120°F (49°C) High: 275°F (135°C) Two pressure ranges   Standard: 300 psi (21 bar) High: 800 psi (55 bar) All Stainless Steel housing Range of seal options FFKM FKM EPDM 12 and 24 volt coils available Light weight (less than 6 grams) Fast (operating speed up to 500 Hz)  

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120 Series Solenoid Valves

Lee Products Ltd.

The Lee Series 120 Solenoid Valve is a 2-way, ultra-miniature, magnetically latched solenoid valve ideal for compact battery-powered pneumatic applications such as air piloting, lab automation (lab-on-a-chip), and other miniature, power-sensitive markets such as fuel cells or for R&D proof of concept projects. The Series 120 valve sets a new industry standard in reducing space, weight and power consumption. Measuring just 0.4" long, the valve weighs 300 mg and requires only 1.8 mJ/switch. It also features high performance flow switching characteristics, reliable bistable performance and quiet operation.

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