Nilfisk Alto DELTABOOSTER 7309021 User Manual

23

The following examples have been worked out on the basis of stainless steel pipes and a 160 
bar system, and the dimension requirements are 

max.15 bar pressure drop from the machine 

to the outlet points.

Two different conditions may be used when
dimensioning the pipe system:

A. Based upon a fixed type of spray lance (capacity l/min)
B. Based upon max. capacity, i.e. all spray lances may be used anywhere

A:
If standard lances (17 l/min) are selected for outlet points 

a, b and c the maximum load on line 

b-c = 17 l/min.
                                                              

According to the diagram the use of a 50 m ∅15 mm                    

pipe will result in a pressure drop of: 

  In the diagram you follow the 50 m division vertically 
  upwards to the curve symbolizing 17 l/min through an  

  ∅15 mm pipe. From here proceed horizontally and a 
  pressure drop of 2.3 bar is had. 

Maximum load on pipe line a-b = 35 l/min.     
Use of 40 m Ø15 mm pipe will result in a pressure drop of:  

  7.4 bar 

Maximum load on pipe line M-a = 51 l/min.
Use of 70 m Ø22 mm pipe will result in a pressure drop of: 

  3.3 bar   

 

 

 

 

 

Total pressure drop 

13.0 bar 

The aggregate pressure drop on the three lines is less than 15 bar and the dimension requirements have therefore 
been met.