SPP id: Version 14 > / 120601 / Replaces 110901 / en /
N31572
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Series
2.15
INSTRUCTIONS
June 2012
Page
ISO
G
COPYRIGHT © SULZER PUMPS FINLAND OY
ORIGINAL INSTRUCTION
USER'S MANUAL – AHLSTAR
Operation
N = No sealing liquid
FR = Internal circulation
FC = Circulation closed loop
FE = External flushing liquid; P
T
+ 0.05 MPa, 3 l/min
*) For high vacuum level external flushing must be doubled or tripled.
BF = Pressurized external flowing sealing liquid; P
T
+ 0.05 MPa (minimum), 3 l/min
Except with the seal pot sealing water equipment, the needed sealant fluid flow is generated by the pumping effect
of the shaft seal. The sealant fluid can be water (T
amb
>0ºC) or a suitable water glycol mixture (T
amb
< 0ºC) or some
other liquid depending on the process application. Sealing fluid T
max
= 100ºC, P
max
= 1.6 MPa.
QF = Non-pressurized (max 0.05 MPa), 3 l/min
G = Grease once a week. Grease must be suitable for the elastomers of mechanical seal.
QFFR = Quench sealing fluid, Recirculation flushing fluid
BFFR = Barrier sealing fluid, Recirculation flushing fluid
QFFE = Quench sealing fluid, External flushing fluid; P
T
+ 0.05 MPa, 3 l/min
*) For high vacuum level external flushing must be doubled or tripled.
BFFE = Barrier sealing fluid, External flushing fluid; P
T
+ 0.05 MPa, 3 l/min
*) For high vacuum level external flushing must be doubled or tripled.
Impellers with balancing holes
p
T
= p
0
-0.005 MPa
Where
p
T
= pressure behind the impeller (MPa)
p
0
= inlet pressure (MPa)
Atmospheric pressure used as reference pressure = 0 MPa
Impellers without balancing holes
Where p
T
= pressure behind the impeller (MPa)
p
0
= inlet pressure (MPa)
ρ
= density of the liquid being pumped (kg/m3)
H = pump head at the operating point in question (m)
n = rotating speed of the pump (r/min)
d
2
= impeller back plate diameter (m)
d
b
= impeller back vane diameter (m)
d
5
= impeller hub diameter is 0.04 m in bearing unit no. 1,
in bearing unit no. 2 0.05 m, in bearing unit no. 3 0.06 m,
in bearing unit no. 4 0.07 m, in bearing unit no. 5 0.09 m,
in bearing unit no. 6 0.10 m and in bearing unit no. 7 0.12 m.
Atmospheric pressure used as reference pressure = 0 MPa
The flushing liquid and sealing liquid must fulfill the following quality requirements:
•
maximum particle size 50
μ
m
•
maximum solid material content 2 mg/l.