B-Flap I - Explosion isolation flap

The innovated explosion isolation flap B-FLAP I is certified according to EN 16447 and EN 15089. B-FLAP I was tested by an accredited laboratory with emphasis on real-world conditions in the various production processes.

With the innovation, we bring extended installation options for the explosion isolation flap valve. According to current standards and certifications, the explosion isolation flap can be installed in horizontal and vertical pipeline. It can be used in aspiration systems with pull or push flow. B-FLAP I can also be installed on pipelines containing obstacles or elbows between the protected equipment and the place of installation of the explosion isolation flap. A novelty is also higher pressure resistance (p_max) of the isolation flap valve and increased maximum reduced pressure (p_red,max) of the protected vessel, from which a potential explosion spreads. According to the latest tests and certifications, the minimum installation distance has been shortened, and the maximum installation distance from the protected equipment has been extended.

The B-Flap I explosion isolation flap can stop the propagation of an explosion caused by processed organic, melting, coarse, and metal dusts up to explosion class St 3 and dusts with very low values of minimum initiation energy (MIE) and temperature (MIT). This new design of the B-FLAP I explosion isolation flap makes it easier to handle during the installation and operational maintenance.

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Enhanced technical parameters of B-Flap I

The explosion isolation flap valve offers the customer effective prevention of explosion transmission between connected technologies. The explosion isolation flap isolates the explosion in the entire pipeline of the suction systems. Thus it is suitable not only to prevent the transmission of explosions at the inlet to the filter or cyclone but also to isolate the explosion on the outlet piping from filtration systems (so-called clean side of the filter). Other installation options of B-FLAP I are, for example, on the suction line to the mill, on the inlet, where material flows to dryers, and other similar equipment.

Explosion isolation flap 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 mechanism. This solution significantly reduces pressure losses in the piping system. 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 is suitable for pipes with a diameter from DN 100 to DN 800.

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 or HRD barrier.

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

certified according to EN 16447 and EN 15089
suitable for all types of dusts, including metal, up to explosion class St 3
certified for explosive dusts with extremely low values of minimum initiation energy and temperature (MIE, MIT)
applications for inlet and outlet suction routes of filtration systems
suitable for push and pull system
reverse flow application
possibility of installation on horizontal and vertical pipes
possibility of use in a piping system consisting of elbows and / or obstacles
wide range of sizes from DN 100 - DN 800
mechanical equipment without the need for electrical energy and a trigger mechanism
low pressure losses, high pressure resistance
possibility of equipping with a position indicator and / or pollution signalizator
easy installation, inspection, and maintenance
explosion isolation flap valve is locked when closed
standardly equipped with an RPD mechanism
optional possibility to produce in a stainless steel version

PREVENTION OF EXPLOSION propagation BETWEEN

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

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)
DN 100	152	132	100	280	287	244	9
DN 125	177	157	125	305	308	269	11
DN 150	202	182	150	330	337	294	13
DN 200	253	233	200	390	387	344	18
DN 250	303	283	250	510	502	417	40
DN 300	363	337	300	580	552	467	50
DN 315	378	352	315	600	567	482	53
DN 355	418	392	355	630	607	522	61
DN 400	464	438	400	695	652	568	77
DN 450	514	488	450	750	702	619	88
DN 500	564	538	500	800	752	669	101
DN 560	664	629	560	930	838	745	157
DN 630	734	698	630	1005	908	815	180
DN 710	814	775	710	1156	1102	967	305
DN 800	904	861	800	1246	1193	1057	351