B-Flap I - Explosion isolation flap valve

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.

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WHERE IS THE RISK?

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.

ADVANTAGES

wide range of sizes from DN 100 - DN 800
mechanical equipment without the need for electrical energy and a control unit
low pressure losses
high pressure resistance
possibility of equipping with a position indicator and/or signaling the pollution of the flap seating surface
easy installation, inspection, and maintenance
mechanical locking system when closing the flap
suitable for technologies working with light metal dust
equipped with a special mechanism RPD (Reducer of Pressure Drop)
installation possible in a piping system consisting of elbows and/or obstacles
installation possible on technologies processing dusts with high values of explosion parameters, including light metal dusts (Al, Mg, etc.)
certified for combustible dusts with extremely low values of minimum initiation energy and temperature (MIE, MIT)

PREVENTION OF EXPLOSION propagation BETWEEN

filters
bins
mills
crushers
separators
cyclones
and other equipment where there is a risk of transmission of a dust explosion

Application of THE B-FLAP I IN COMBINATION WITH THE EXPLOSION VENTING DEVICE VMP

application of the B-FLAP I WITH EQUIPMENT FOR FLAMELESS EXPLOSION VENTING DEVICE FLEX

application of the B-FLAP I IN COMBINATION WITH HRD SYSTEM FOR EXPLOSION SUPPRESSION

Food industry - malthouse

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.

References from installations

TECHNICAL PARAMETERS

Type	ØA (mm)	ØB (mm)	ØC (mm)	L (mm)	N (mm)	P (mm)	Weight (kg)	Dust explosion class	Installation distance min - max (m)
DN 100	152	132	100	280	287	244	9	St1, St2	3 - 7
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