09.06.2014
A new standard for isolation flap valves
REMBE Ltd, Sharnbrook – UK subsidiary of the parent company based in Brilon, Germany – points out that the new standard BS EN 16447 for isolation flap valves is now published and supersedes the old standard BS EN 15089. EN 16447 differentiates between in-line isolation of St.1 and St.2 dusts, both of which are subject to new and stringent testing in order to gain ATEX-compliant certification.
o Specific application data needs to be defined (eg ‘metal dusts’).
o Testing needs to be conducted with dust in ductwork.
o Testing of min/max mounting distances – min/max K-value.
o Distinction between push-flow and pull-flow applications; push-flow needs to be tested with air.
o After closure the valve shall stay closed long enough to avoid the transmission of flames during an explosion event.
REMBE was the first manufacturer – and still remains one of the very few – to offer valves certified to this new standard, with the Q-FLAP COMPACT II. Valves tested and certified for St.2 dusts with a max pred of 0.7 barg cover sizes DN100, DN140, DN160, DN200, DN250, DN280 and DN315. Larger sizes for St.2 dust applications are still under development and will be introduced in the coming months. Further information is available from REMBE Ltd’s managing director Mike MacClancy at Michael.MacClancy@rembe.co.uk (tel: +44 1234 783360). www.rembe.co.uk
REMBE’s Q-FLAP COMPACT II, certified to EN 16447, is the only valve with a swing lid for easy opening and fully reversible flap to facilitate in-line cleaning
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