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WIRE
2/2009 March
 
 
 Dome pressure regulator<br>
Dome pressure regulator
Photo: Witt-Gasetechnik GmbH & Co. KG

BAM tests dome pressure regulator for oxygen

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Recently a dome pressure regulator has become available which has passed inspection by BAM (Federal Institute for Materials Research and Testing). The 737 LE HD by Witt is burn-out resistant for use with oxygen at pressures of up to 200 bar (approx. 2900psi) and temperatures of up to 60°C (140°F).
“In terms of the accident prevention regulations, this gives users an unprecedented level of safety”, said Christian Flücken from the manufacturer in Witten. The pressure regulator now also complies with the requirements of hazardous substance leaflet M034-2 issued by the Employer's Liability Insurance Association for the Chemicals Industry. The leaflet defines products found to be suitable for use in plant components for oxygen.
Safety experts advocate inspections by BAM, which uses objective test procedures to verify information provided by the manufacturer. In the end, the one-off positive inspection means safety for the user. Oxygen is considered a critical application for dome pressure regulators because of the risk of burn-out from spontaneous ignition at high pressures. Witt has developed the 737 series to deal with this problem. The high-power regulator can also be used for other technical gases in addition to oxygen.
Dome pressure regulators are used in supply lines for mixing systems and burners. Here they generate a constant working pressure, compensating for pressure fluctuations in the gas supply and varying withdrawal quantities. This warrants a constant gas concentration and assures the quality of the downstream work process.
The maximum pre-pressure for the 737 is 200bar (approx. 2900psi), with a regulating range from 2 to 45bar (29 to 653psi). Dome pressure regulators by Witt always work in combination with a separate control pressure regulator or proportional valve for adjusting the required working pressure for the user's process. The 737 offers an impressive, comparatively high nominal gas flow of approx. 81,200 SCFH. A replaceable filter is fitted for “clean” gas. In addition, the compact design that can be installed even in confined space conditions also has two connections each on the low- and high-pressure side, which can be used for example for pressure gauges. Furthermore, several gas supplies can be regulated centrally with a joint working pressure. In total there are four models in the 737 series.Witt is considered to be one of the leading manufacturers of top quality safety and regulating technology for all kinds of gases. The company is present in more than 60 countries.


Witt-Gasetechnik GmbH & Co. KG
Tel.: +49 2302 8901-0
http://www.wittgas.com
 
 
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