mcr PL1
overpressure-bleed damper
MERCOR SA –
The Company reserves the right to make modifications and changes.
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1. INTRODUCTION____________________________________________________
The aim of this Technical and Operational Documentation is to acquaint the user with the purpose,
construction, principle of operation, correct installation and operation of the product.
The Documentation contains also additional information on operating conditions, maintenance, and
terms of guarantee of the product.
The Documentation concerns the entire group of overpressure dampers of mcr PL1 type. Observing the
recommendations contained in this Documentation shall ensure correct functioning of the device as
regards fire protections of rooms, as well as safety of the system users.
2. SUBJECT MATTER OF THE DOCUMENTATION ___________________
The subject matter of the present Technical and Operational Documentation are:
Rectangular overpressure-bleed dampers mcr PL1
3. PURPOSE OF THE DEVICE_________________________________________
Application ________________________________________________________________________
Dampers of mcr PL1 type are used as bleed dampers in overpressure systems of staircases. These
devices can also be applied in any premises that are protected against smoke with overpressure. The
function of the dampers is to maintain an adequate differential pressure before and behind their partition,
thus operating as so-called safety valves that prevent the increase of pressure above a set value, e.g. in
a protected staircase. The devices meet the requirements of the PN-EN 12101-6 standard.
Fire Resistance ___________________________________________________________________
The device does not feature fire resistance, as it is not required for its correct operation.
Execution Versions _______________________________________________________________
•
Wall-mounted - S
•
Duct-mounted - K
4. CONSTRUCTION AND PRINCIPLE OF OPERATION________________
Construction ______________________________________________________________________
The mcr PL1 damper consists of a casing made of galvanised steel sheet, 1.25 mm thick (1), with an
embedded baffle made of rotating blades (2). Individual blades of the baffle are made of galvanised steel
sheet of a specially designed shape. Owing to their multi-layer design, the rotating blades do not move
outside the casing of the damper. Individual blades of the baffle feature weights that impose load on the
baffle (4). The weights are made of steel straps of a suitable mass and shape that provide the device
with a required working point and the speed of action and reaction to changing pressures. Along the
width of the damper, polyethylene straps gaskets are glued in order to provide better tightness of the
device (3).
In order to limit an opening angle of blades, steel opening and closing limiters are mounted on the casing
of the damper. The design and manufacturing of the device provide the fast reaction that complies with
the PN-EN 12101-6 standard.
