The model 910.21 pre-volume deflagration flame arrester enables the mounting of pressure measuring instruments and diaphragm seal systems in areas with requirements to EPL Ga (zone 0).

The model 910.21 is expertly connected to a measuring instrument at the factory to form a measuring assembly.
The pre-volume deflagration flame arrester enables the flow of fluids, but prevents the flame tranmission from the instrument side (unprotected side) to the process side (protected side) in the event of a failure.

The pre-volume deflagration flame arrester, integrated ex-works, is available for pressure gauges with Ex approval as well as for diaphragm seal systems with Ex-approved measuring instruments.

The model 910.21 fulfils the requirements of the harmonised standard EN ISO 16852 for flame arresters.

With approvals in accordance with ATEX and IECEx, European and international safety requirements for explosion protection are fulfilled.