Mandik FDMR, Installation, Operation, Maintenance And Service Instructions

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Page 91 Version 2023-06-15 Fire damper - FDMR
TPM 140/19
D 100 125 140 150 160 180 200 225 250 280 300
ξ 2,736 2,099 1,781 1,527 1,272 0,929 0,636 0,892 0,747 0,627 0,576
D 315 350 355 400 450 500 560 600 630 710 800
ξ 0,531 0,471 0,455 0,393 0,344 0,307 0,273 0,258 0,243 0,111 0,099
Coefficient of local pressure loss
VI. TECHNICAL DATA
Pressure loss
Pressure loss calculation
Determination of pressure loss by using diagram ρ = 1,2 kg/m
3
Δp = ξ · ρ ·
w 2
2
Δp [Pa] presure loss
w [m/s] air flow speed in nominal damper section
ρ [kg/m
3
] air density
ξ [-] coefficient of local pressure loss for the nominal damper section