Composed of two layers of fireproof shade faces,at an interval of
about equal t or greater than 250mm air layer.Taking advantage of
the good thermal insulation of the air,enhances the heat insulation
of the rolling shutter.It owns the good properties of light
weight,nice function and cost effective and so on. The product
fire-rated time is up to 3hrs,the average speed of the electric
opening and closing is 2m/min to 7.5m/min with two step closure
properties and temperature control release properties.Curtain plate
is made of dual rail inorganic fire-retardant fabri with the
accessories of transmision device,fireproof electric rolling door
machine,fire control box,and freestanding temperature detector etc.
This type fire roller shutter with no need for water curtain
protection,will greatly reduce the investment of water supply
system, and greatly saving water.It also has good characteristics
of smoke and anti-corrosion,anti-acid and alkali,anti-aging,light
weight and lower price etc.No deformation in case of fire,the
structure is simple ,easy to install and son on. Applicable in the
industrial and civil buildings in the conditons of when it is
determined by the shutter back fire surface temperature(the average
temperature rise less than or equal to 140℃,the highest temperature
rise is less than or equal to 180℃),and whose refractory limit time
is equal to or more than 3Hrs.Especially suitalbe for fire
partition places where it is not suitable for automatic spraying
system.