Explosion isolation flap valve B-FLAP I is a mechanical device designed to prevent the transfer of flame and pressure between technologies during an explosion. During normal operation, the explosion isolation flap valve is kept open using the RPD (Reducer of Pressure Drop) mechanism. This solution significantly reduces pressure losses in the piping system, or due to airflow in the pipeline. During the explosion, the protected pipe will be closed and locked. Together with other safety elements, our flap valve forms an effective system for the protection of technological units. Most often, B-FLAP I is used in combination with an explosion venting device - VMP or FLEX. The explosion isolation flap valve is suitable for pipes with a diameter from DN 100 to DN 800. Explosion isolation flap valve B-FLAP I is certified according to EN 16447 standard.
If you use pneumatic conveying, vertical piping with a diameter of less than DN 100 in your technology, or you have technology designed for maximum explosion pressure or shorter installation distances, see GatEx.
In piping systems, during material conveying between individual parts of the production technology, initiation source (e.g. hot surface, friction, a spark from equipment failure, etc.) can be easily formed, which in combination with the flowing air and the transported material creates an explosive mixture. The pressure wave and the flame bursting through the piping system can explode and thus destroy the connected technologies or endanger personnel within a close range.
Malthouses are an integral part of the food industry. This following case study will show you all risk areas, including the selection of the most suitable explosion protection designed by RSBP.
|Weight (kg)||Dust explosion class||Installation distance
min - max (m)
|DN 125||177||157||125||305||308||269||11||St1, St2||3 - 7|
|DN 150||202||182||150||330||337||294||13||St1, St2||3 - 7|
|DN 200||253||233||200||390||387||344||18||St1, St2||3 - 7|
|DN 250||303||283||250||510||502||417||40||St1, St2||4 - 7|
|DN 300||363||337||300||580||552||467||50||St1, St2||4 - 7|
|DN 315||378||352||315||600||567||482||53||St1, St2||4 - 7|
|DN 355||418||392||355||630||607||522||61||St1, St2||4 - 7|
|DN 400||464||438||400||695||652||568||77||St1, St2||4 - 7|
|DN 450||514||488||450||750||702||619||88||St1||4 - 7|
|DN 500||564||538||500||800||752||669||101||St1||4 - 7|
|DN 560||664||629||560||930||838||745||157||St1||4 - 7|
|DN 630||734||698||630||1005||908||815||180||St1||4 - 7|
|DN 710||814||775||710||1156||1103||962||305||St1||3 - 7|
|DN 800||904||861||800||1246||1193||1052||351||St1||3 - 7|
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