Minimum Presure - ITT A 402 Serie Instructions D'installation Et D'entretien

A_AD 16.05.2007 8:22 Uhr
52
Seite 52
english
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.
Safety elements (such as spring lock washers)
Warning
are not admissible.
Special seals and screws must be used
Warning
for PN 10/16.
Use the appropriate screws
for the given nominal pressure PN.
PN 6 PN 10 / PN 16
DN 40
DN 50 M 12
DN 65
Admissible screw torque:
for M 12 ➜ 40 Nm
for M 16 ➜ 95 Nm
The installation of combination flange
with combination flange is not admissible.
Install the sluice gate before and after the pump.
This prevents the fluid from being drained and refilled
when the pump is exchanged.
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
A 501 AD 501
A 502 AD 502
A 651 AD 651
A 652 AD 652
The values apply up to 500 m above sea level.
Additions for higher altitudes:
0.01 bar per 100 m of altitude
Addition for:
Addition for: 110 °C
A
PN 6
M 16 Ø 14
0,4 bar overpressure
0,2 bar overpressure
0,5 bar overpressure
0,35 bar overpressure
1,0 bar overpressure
95 °C + 0,45 bar
+ 1,1 bar
B
PN 10 / PN 16
Ø 18