Borger Classic FL 776 - Page 53

Pump output per revolution
FL 518 approx. 5.6 l approx. 1.48 gal
FL 776 approx. 8.4 l approx. 2.22 gal
FL 1036 approx. 11.23 l approx. 2.97 gal
The actual pump output depends on several factors, such as pres-
sure, viscosity
, speed and pump configuration.
The permissible working pressure and differential pressure for
which your rotary lobe pump unit was designed are also specified
in the data sheet.
The following limits should be taken into account, especially for
rotary lobe pumps delivered without drives:
General limits:
Pump
Flow rate Q [m
3
/h / gpm]
Speed n [rpm] Vacuum
Working pres-
sure
Recom-
mended
Permitted Recom-
mended
Permitted p
s
max.
FL518
50-100
(220-441)
20-165
(88-727)
150-400 50-600
-0.7 bar
(21'' HG vac)
10 bar
1) 2)
(145 psi)
1) 2)
FL776
70-140
(308-617)
30-240
(132-1057)
150-400 50-600
-0.7 bar
(21'' HG vac)
8 bar
1)
(1
16 psi)
1)
FL1036
90-180
(396-793)
40-330
(176-1454)
150-400 50-600
-0.7 bar
(21'' HG vac)
6 bar
1)
(87 psi)
1)
1)
Pumps that are switched in series can have a higher maximum permitted working pressure at the second pump (see data sheet). The limit mentioned here applies to the
difference in pressure between the inlet and outlet, which must also be observed in pumps switched in series.
2)
12 bar (174 psi) subject to agreement
Maximum differential pressure ∆ p, depending on the speed
FL... Speed n [rpm]
100 200 300 400 500 600
518
10
1)
bar
(145
1)
psi)
10
1)
bar
(145
1)
psi)
10
1)
bar
(145
1)
psi)
10
1)
bar
(145
1)
psi)
10 bar
(145 psi)
8 bar
(1
16 psi)
776
6
2)
bar
(87
2)
psi)
6
2)
bar
(87
2)
psi)
145
1)
psi
6
2)
bar
(87
2)
psi)
6
2)
bar
(87
2)
psi)
6
2)
bar
(87
2)
psi)
4
3)
bar
(58
3)
psi)
1036 4 bar
(58 psi)
4 bar
(58 psi)
4 bar
(58 psi)
4 bar
(58 psi)
4 bar
(58 psi)
2 bar
(29 psi)
Product Description
BA-Classic FL_en-US, 03.05.2018 www.boerger.de / www.boerger.com 53