Full fixing instructions supplied with the product.
Please contact our Technical Team if you require additional advice.
DD-420S has been assessed to BS 476 Part 22 for use on FD30 Door sets.
DD-420S has been successfully tested to BS EN 1634-3 for cold smoke sealing (air leakage).
Cycling test: 200,000 opening and closing cycles.
Acoustic performance test
Acoustic tests have been conducted in accordance with the standards listed below:
34dB can be achieved.