B-Flap I PRO - Explosion isolation flap

The innovated explosion isolation flap B-FLAP I PRO is certified according to EN 16447 and EN 15089. B-FLAP I PRO 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 PRO 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 (pmax) of the isolation flap valve and increased maximum reduced pressure (pred,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 PRO 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 PRO explosion isolation flap makes it easier to handle during the installation and operational maintenance.

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

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 PROGATION BETWEEN

spray dryers

filters

bins

mills

crushers

separators

cyclones

and other equipment where there is a risk of transmission of a dust explosion

ENHANCED TECHNICAL PARAMETERS OF B-FLAP I

The explosion isolation flap valve provides customers with effective measures to prevent explosion propagation between interconnected technologies. By isolating explosions within the entire pipeline of suction systems, this flap valve not only safeguards against explosion transmission at inlet points like filters or cyclones but also effectively contains explosions within outlet piping from filtration systems (known as the “clean side” of the filter). Additionally, B-FLAP I offers versatile installation options, including placement on suction lines to mills, at material inlet points for dryers, and similar equipment.

B-FLAP I is a mechanical device engineered to halt the transfer of flame and pressure between technologies during explosions. During regular operations, the explosion isolation flap valve remains open via the RPD mechanism, minimizing pressure losses in the piping system. In the event of an explosion, the protected pipe is swiftly closed and secured, bolstering overall safety alongside other protective features. Frequently, B-FLAP I is employed alongside explosion venting devices such as VMP or FLEX, and it is compatible with pipes ranging from DN 100 to DN 800 in diameter.

For pneumatic conveying systems, vertical piping with diameters under DN 100, or setups designed for maximum explosion pressure or shorter installation distances, alternatives like GatEx or HRD barriers may be more suitable.

FOOD INDUSTRY - MALTHOUSE

Malthouses are an integral part of the food industry. These following references from installations will show you all risk areas, including the selection of the most suitable explosion protection.

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	41
DN 280	343	317	280	560	537	447	48
DN 300	363	337	300	580	552	467	51
DN 315	378	352	315	600	567	482	54
DN 355	418	392	355	630	607	522	62
DN 400	464	438	400	695	652	568	73
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