4.7 Minimum pressure
The minimum pressure in the pump connection at
75 °C
to ensure lubrication of the friction bearings:
Single pumps
Twin pumps
A 402/402-1
AD 402-1
0,4 bar overpressure
A 501
AD 501
0,2 bar overpressure
A 502
AD 502
0,5 bar overpressure
A 651
AD 651
0,35 bar overpressure
A 652
AD 652
1,0 bar overpressure
The values apply up to 500 m above sea level.
Additions for higher altitudes:
0.01 bar per 100 m of altitude
Addition for:
95 °C
+ 0,45 bar
Addition for:
110 °C
+ 1,1 bar
Install the
sluice gate
before and after the pump.
This prevents the fluid from being drained and refilled
when the pump is exchanged.
Admissible screw torque:
for M 12
➜
40 Nm
for M 16
➜
95 Nm
The installation of combination flange
with combination flange is not admissible.
PN 6
PN 10 / PN 16
PN 6
PN 10 / PN 16
DN 40
DN 50
M 12
M 16
Ø 14
Ø 18
DN 65
english
52
The pump flanges are bored with fixing holes PN6 / PN10 / PN16.
The plain washers «B» provided are to be installed
on the pump side to ensure that the flanges are securely fastened.
Use the appropriate screws
for the given nominal pressure PN.
A
B
Safety elements (such as spring lock washers)
are not admissible.
Warning
Special seals and screws must be used
for PN 10/16.
Warning
A_AD 16.05.2007 8:22 Uhr Seite 52
