This is a circulated PR piece by blu Performance for DGB Products

Specialist 316 Marine Grade hardware manufacturer blu has launched its new LP400 Stainless Steel letter plate following best in class results against the new BS EN Air Permeability, Water Tightness and Wind Resistance tests.

The only back-to-back sleeved letter plate on the market with an integrated brush and gasket weather seal system the new LP400 achieved the highest possible results when undergoing the BS EN test against extreme air, wind and water:

Test Element

Air Permeability

Water Tightness

Wind Resistance


BS EN 12207:2000

BS EN 12208:2000

BS EN 12210:2001

Test method

BS EN 1026:2000

BS EN 1027:2000

BS EN 12211:2000


600 Pa

600 Pa

3000 Pa





What Do the Test Results Mean?

Air Permeability Test – BS EN 12207:2000 – measures the volume of air that passes through the letter plate at different pressures. Class 4 is the highest class and was successfully achieved by the LP400.

Water Tightness Test – BS EN 12208:2000 – in this test, water is forced at the letter plate through water nozzles, to represent driving rain, at differing pressures for lengthening periods of time. The highest designated class is A9, which indicates the letter plate withstood 600 Pa of water pressure for 55 minutes without compromise.

Wind Resistance Test – BS EN 12210:2001 – this tests at which point draughts can get through the letter plate. Class 5 is the highest classification which is achieved after withstanding 2000 Pa. The LP400 achieved 3000 Pa, which is equivalent to a wind speed of approx. 152mph! Anything above a wind speed of 74mph is classed as a hurricane so the LP400 is well able to withstand anything the British weather can throw at it.

Delivering classic styling with a contemporary twist, the LP400 is available in a number of finishes manufactured from corrosion-resistant 316 Marine Grade Stainless Steel, which is also Part Q compliant.

Constructed without compromise, the new LP400 Letter Plate features:

– Integral brushes, gaskets and telescopic liner for excellent weather protection and to help reduce draughts.

– Built-in inner security flap to help prevent ‘fishing’

– Security Tested to PAS24 and manufactured to TS008 specifications

– Back to back construction fixing method for strength

– Made from 316 Marine Grade Stainless Steel for superior resistance to corrosion

– Lifetime guarantee for customer peace of mind

– Reduces potential site call backs

– Available in 4 finishes Super-Satin, Mirror Polished, PVD Brass and Oil Rubbed Bronze

– Suitable for door thicknesses 44-68mm

To find out more about the LP400 Letter plate visit email [email protected] or call 01726 871724.

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