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FLAT DISC SPRING DESIGN REDEFINES DYNAMIC PERFORMANCE, OPERATING SENSITIVITY, CONTROL & STABILITY OF NEW PROPORTIONAL VALVES.

Bürkert’s new Type 2822 proportional valves are designed with unique shaped springs, enabling them to set new performance standards for higher sensitivity to positional changes, and provide improved control, higher span, and reduced noise and wear in gas handling and medical engineering applications.

The design of the Type 2822 valves is optimised by the inclusion of a flat, disc spring, which provides improved control and guiding of the armature. Even when subject to pressure loads and vibration, this design ensures superlative stability; the valves operate almost silently with minimum amounts of friction and delivering high dynamic response, maximum repeat accuracy, and zero stick-slip.

The Type 2822 is a precision proportional valve designed for minimal flow rates. The unit combines excellent response sensitivity and a measuring span better than 1:1000 with low electrical power consumption, low-noise operation and consistent performance over a long lifecycle. This impressive performance is achieved by frictionless guidance of the solenoid armature and the resultant stroke resolution in the sub-micrometer range, essential for ultra-low measuring spans.

The direct-acting Type 2822 valves can be used as a control valve for process control and is also suitable for technical vacuum. Their compact design and low noise levels make them ideal components for installation in machinery or medical devices. In these applications the proportional valves offer enhanced flexibility and improved integration options, as they can be mounted and integrated directly onto manifolds

The 2822 valve offers users the flexibility of control either using Burkert’s new Type 8605 digital electronic control module, or via an existing supervisory control system.

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Developed to control Burkert’s new generation of proportional valves, the Type 8605 provides extremely stable control of the coil current in the Type 2822 via an optimized PWM voltage signal that compensates for thermally induced changes in coil resistance.

For setup and diagnostic purposes, the Type 8605 features a detachable operating terminal, including display and keyboard. The controller also features serial communication, via RS232 and RS485 interfaces, enabling user-friendly and convenient adaptation to application conditions. In this context, extensive configuration options allow a broad range of operating conditions to be covered flexibly with only a few standard variants.

The many features of the Type 2822 mean that the valves are suitable for use in the widest range of precision applications, adding to the considerable scope of the existing valves, approved versions of which can also be specified in ATEX hazardous Zone 0 areas on request.  Applications now include medical devices: instruments, ventilators and dental equipment; fuel cells; textile heat sealing machines; vapour recovery; analysers (e.g. spectrometers); welding; testing stations; and in pressurised and encapsulated devices for hazardous areas and bioreactors.


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For further information contact: Helen Christopher, Burkert Fluid Control Systems Brimscombe Port Business Park Brimscombe STROUD GL5 2QQ United Kingdom  Tel:  +44 (0)1453 731353 Fax:  +44 (0)1453 731343   E-mail: Helen.christopher@burkert.com

 


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