Gas non-return valve prevents back-feeding of gas

The 800 ES gas non-return valve from Witt has been tested by BAM for burnout safety up to 240 bar (3481lb/in2) with oxygen.

The valve is fire-resistant up to the stated pressure limit.

Witt said the one-time test by BAM makes it easier for the user to obtain a permit for a gas supply system, enhancing safety and saving costs.

In addition to oxygen, the 800 ES can also be used for other technical gases, including hydrogen.

Applications include almost all machinery, pressure control stations and flammable gas pipelines.

Any back-feeding of gas in these systems could lead to the formation of combustible mixtures and cause an explosion.

Gas non-return valves, such as the 800 ES, prevent this.

They are the only systems capable of automatically preventing creeping or sudden reverse gas flow.

Installation should not present any problems, even in confined spaces.

The part produced by Witt is less than 70mm (2.8in) long with a diameter of 18mm (0.7in) and has the commonly used 1/4in NPT thread.

It is mainly made of stainless steel as this is more resistant than brass.

The valve seal and O-ring are chosen according to the type of gas.

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