Calculation of Pressure Losses on Dust & Fumes Collecting System

Unit Converter

Air Speed m/s

Dynamic Loss Pd

mm.H2O
mm.H2O

Fan Entry Loss

mm.H2O

จำนวนท่อทางเข้า

mm.H2O

Exit Fan Loss

mm.H2O

จำนวนท่อทางออก

mm.H2O

Corners/Elbows Loss

mm.H2O

จำนวนข้องอ

mm.H2O

Forks/Splits Loss

mm.H2O

จำนวนแยก

mm.H2O

Suction Hood Loss

mm.H2O

จำนวนหัวดูด

mm.H2O

Flexible hose Loss by mt

mm.H2O

จำนวนท่ออ่อน

mm.H2O

Intermediate Total

mm.H2O

Pipeline Loss

mm.H2O

Additional Losses

Example: additional DUST COLLECTOR

Recommend 100-150 mm.H2O

mm.H2O

Safty Factor

Recommend more than 10%

Total Static Losses

mm.H2O

Total Losses Pt

mm.H2O
Indicative Air Speed in the pipe :

Smoke and Vapours : 16 to 20 m/s

Light Dust : 20 to 25 m/s

Haevy Dust : 25 to 30 m/s

The AVERAGE DIAMETER should be calculated on the main central line (longest one) of the system only till the farest point of it (Side branches not to be taken into consideration)

WOODWORKING s: Wide belt sanders, CNC, high speed

moulders please use 30 m/s

Calculation of the pipe DIAMETER knowing the SPEED and the AIR FLOW

SPEED m/s

m/s

CAPACITY m3/h

M3/H
mm
Calculation of the AIR FLOW knowing the SPEED and the pipe DIAMETER

SPEED m/s

mm

DIAMETER mm.

mm
M3/H
Indicative Electrical Power calculation (Installed kW) needed knowing AIR FLOW and LOSSES

AIR FLOW m3/h

LOSSES MM/H2O

mm/H2O
kW
Indicative Electrical Power calculation (Absorbed kW) needed knowing AIR FLOW and LOSSES

AIR FLOW m3/h

LOSSES MM/H2O

mm/H2O
kW