Nilfisk-ALTO 7309021 user manual Example 60 m, 30 m 10 m M 80 m, Pressure, Drop

B:

If, on the other hand, a green spray lance is selected = 33 l/min + a standard spray lance = 17 l/min the maximum load on the line b-c= 33 l/min.

Use of 50 m ∅15 mm pipe will result in a pressure drop of:

Maximum load on line a-b= 50 l/min.

Use of 40 m ∅22 mm pipe will result in a pressure drop of:

Maximum load on line M-a= 50 l/min.

Use of 70 m ∅22 mm pipe will result in a pressure drop of:

Total pressure drop

PRESSURE DROP

9.3bar

2.0bar

3.2bar

14.5bar

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

Example 2

60 m

20

c

10m 20

c1			b1				a1
20						20
		b				a
		30 m			30 m		10 m M
20						20
		2			2				2
	c		b	a

80 m

Branched system

Selection of spray lance: 2 green spray lances each of 33 l/min 2 blue spray lances each of 17 l/min

	PRESSURE
Maximum load in each branch is 33 l/min	DROP
Use of∅15 mm pipe on e.g. the a-a2line
(20m) will result in a pressure drop of:	4.0	bar
Maximum load on line b-c= 66 l/min
Use of 30 m ∅22 mm pipe will result in a pressure drop of:	2.5	bar
Maximum load on line a-b + M-a= 101 l/min
Use of 40 m ∅22 mm pipe will result in a pressure drop of:	7.5	bar
Total pressure drop	14.0	bar

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

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