Application area

According to VGB 112, pneumatically fillable silos and containers must be equipped with an overpressure/underpressure safety device. The Mahr pressure equalisation valve is supplied in nominal size DN 200.

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The response pressure is adjusted using sliding weights. The negative pressure can be set between 5 and 13 mbar, the positive pressure up to max. 40 mbar.

The inexpensive alternative is a spring-loaded DN 250 pressure/vacuum relief valve