Bürkert has introduced its third generation of solenoid control valves for numerous applications in which fluids are mixed or metered, including medical, analytical and fuel-cell technology and fuel metering systems.
Also suitable for the surface coating of oxyacetylene cutting systems, the new types 2871, 2873 and 2875 are designed to offer better response and good repeatability.
Since launching the first generation of solenoid control valves in the early 1990s, the company has continuously improved their performance.
The turn-down ratio of the valves has been increased from 100:1 to 200:1. The new bearing principle makes it possible to eliminate a guide bush, therefore providing a completely frictionless bearing for the plunger in the valves. The elimination of solid-to-solid friction on the guide bush offers many benefits to users with high requirements.
Valves with frictionless plunger bearings feature better response, meaning the position of the plunger already changes with minimal differences in the input signal.
Bürkert has also been able to improve the behaviour in use with low pressures of less than 100mbar, and stick-slip effects have now been completely eliminated. No friction at the guiding elements of the solenoid control valves means no temperature increases at the bearings during operation of the valve; the new generation of Bürkert solenoid control valves can therefore also be used with very dry gases.
