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3 INSTALLATION
3.1 INSTALLATION
1.
The mounting surface should be flat and level.
2.
Ensure at least 0.5 m clearance around the pump.
3.
Normally, pump and drive unit are assembled on a baseplate. If you want another
configuration, feel free to contact PACKO.
4.
To check the direction of rotor’s rotation, start and stop the motor for a short time.
5.
Before connecting the pipelines, check the location of suction and discharge.
6.
Ensure the pipelines are connecting correctly and tightly.
7.
The suction line should be kept as short as possible and present minimum friction loss.
8.
To check the working condition correctly, we recommend installing a pressure relieve valve
and pressure gauge at discharge line.
9.
Suction and discharge lines must be fully supported and installed so that no expansion or
shock forces act on the pump which could lead to distortion.
10.
Ensure sufficient clearance around the motor and pump.
11.
The coupling alignment must be checked and readjusted if necessary.
3.2 ADJUSTMENT PRESSURE RELIEF VALVE
Instructions for the adjustment of the pressure relief valve for the PACKO rotary
lobe pumps
Pressure ratios of the individual pump types:
There are two types of pressure relief valves for each model, high and low pressure. These differ in the type
of spring used. To convert the pumps from high to low pressure or from low to high pressure, the spring
marked in the drawing below must be replaced. The respective part numbers of the springs can be found in
the parts list of your pump.
Classification of the spring types:
ZL110
0 bar ~ 10 bar: low pressure
12 bar ~ 20 bar: high pressure
ZL115 - ZL120
0 bar ~ 7 bar: low pressure
8 bar ~ 12 bar: high pressure
ZL220 & ZL225
0 bar ~ 7 bar: low pressure
8 bar ~ 12 bar: high pressure
ZL330 & ZL340
0 bar ~ 5 bar: low pressure
6 bar ~ 12 bar: high pressure
ZL440 AND ZL450
0 bar ~ 10 bar: only one spring type
