Guard; Bellows; Speed Monitor; Operating Fluid - GD AQUALINE 1100 Installation & Operating Instructions Manual

Installation
4.6.7

Guard

The drive of the machine and the hot pressure lines
must be protected by guards.
It must not be possible to touch rotating or reciprocat-
ing machine parts accidentally.
4.6.8

Bellows

To limit the connection forces in the suction and pres-
sure line of the liquid ring pump, vacuum-tight and
pressure-tight bellows must be installed.
At the same time, the bellows isolate solid-borne noise
of the suction and pressure lines.
4.6.9

Speed monitor

Speed control of the liquid ring pump and a speed in-
dicator in the operating area of the machine are recom-
mended. For permitted speed range, see chapter 4.8
"Drive".
4.7

Operating fluid

For start-up, the liquid ring pump requires an amount
of water sufficient to form the liquid ring.
Therefore, when installing the pump, make certain that
the water tank is located so that when the operating
water feed valve is open and the tank contains a mini-
mum of water, the liquid ring pump fills with water up to
the middle (also see Operating Instructions). If this is
not ensured there may be problems in starting the
pump (no conveyed medium flow).
If the water tank is located so that the liquid level is
above the middle of the liquid ring pump, an automatic
water stop valve must be installed in the operating wa-
ter supply line. This valve must open when the pump
starts and close when it is stopped to prevent inunda-
tion of the pump.
If the liquid ring pump is installed above the water level
in the tank, a pump is required to ensure the operating
water supply. The design of that pump must be such
that the liquid ring pump is supplied with sufficient op-
erating fluid. We will be glad to assist you in selecting
the right pump.
Because liquid is removed from the working space and
also because heat must be dissipated, the liquid ring
pump requires a constant supply of operating fluid. For
this, the covers of the machine have a G 1
tion (only one operating water supply connection is
needed, i.e. either on the A side or B side).
4990671000 February 2008
If the piping has sufficiently low resistance (feeding line
diameter R1
and layout) no recirculation pump may be needed for
the operating water supply provided the arrangement
of the liquid ring pump is such that the middle of the
pump is at a lower level than the minimum liquid level
in the storage tank.
4.7.1
A circulation cooling system is required for back-cool-
ing the operating water. The circulation cooling must
be able to handle the following amounts of heat.
To reduce the loss of liquid by the exhaust air to a min-
imum and to ensure sufficient operating hours of the
system, a combined operating water storage and sep-
arating tank is needed. For minimum sizes, refer to the
table below.
Aqualine
Amount of heat
to be
dissipated
at 1.5 bar
at 0.5 bar
at 400 mbar
at 200 mbar
Recom-
mended pipe
diameter oper-
ating water line
Recom-
mended mini-
mum tank size
Recom-
mended water
volume in the
tank
The above minimum water storage figures relate to
systems with water back-cooling.
Systems without water back-cooling require substan-
tially larger storage tanks to ensure sufficient operating
hours of the liquid ring pump without running the risk
1
/ " connec- that the recommended limit temperature of 55 °C the
4
operating water inflow is exceeded.
Suction dramatically reduces at higher temperatures.
18
1
/ " to R2", depending on pipeline length
2
A level control of the operating liquid must be-
provided if the machine is operating in a poten-
tially explosive atmosphere.
Operating water back-cooling and
storage tank
1100 1600
kW 50 65
(g)
25 32
(g)
29 39
33 48
1
R1 / " R1
2
ltr 250 350
ltr 150 225
2100 2700
78
39 50
48 58
57 67
1 1 1
/ " R1 / " R1 / "
2 2 2
450 600
300 400