Extensive testing of the JFM tunnel fire and smoke damper ensures proven performance in a fire and reliable operation in a tunnel environment. The JFM has a 4 hour fire integrity rated in accordance with BS 476 Part 20 and AS 1530.4 at a temperature in excess of 1150 degree Celsius. It has been fire tested at Warrington Fire Research Centre in the UK for both vertical and horizontal installation with a variety of pneumatic and electric actuators. Both double acting and spring return actuators are certified. The JFM is also suitable for high temperature operation for smoke control and has been tested at Warrington Fire Research Centre in the UK at temperatures up to 400 degree Celsius for 2 hours with a variety of different pneumatic and electric actuators. The damper has low leakage for isolation of smoke. The smoke leakage rate at 250 degree Celsius is equivalent to a UL555S class 1 rating at pressures in excess of 3kPa. The robust design has been tested to withstand a cyclic pressure of +/- 6kPa for 8 million cycles at BSRIA in the UK.
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