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I never face problem like that because this is not always constant and change as per site conditions but its simple
pressure = force/area
Pressure you need is50 Pascal
Now calculate the flow as per the staircase volume and get the duct size and then you will get the area of the damper as well so as per the gauge you will find the weight of the dampler
P = F/A
P * A = F F = force and here force will be same as weight to counter that pressure
Hope this will work
No,but you can adjust the used weight on the pressure relief damper to match the required pressure that has to be maintained in the stair case which is50 Pa
actually i did not face this problem befor but i think there is a simple solution by applying mechanical force balance as below :
P=M * g * A which;
p = pressure in pa
M = mass in KG
g =9.81 m/s2
A = cross sectional area for the damper
for example :
50 = M *9.81 *1
M =5.1 Kg
put i think there is another factor for the moment arm wich will decrease this mass and we will chose less mass according to the arm length
