57
VERSION 10/2018
ORDER NUMBER DOC 2339321
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6.6.2 BASIC FLUSHING AND PRESSURE TIGHTNESS TEST
The devices are tested in the factory with emulsifying oil, pure oil or solvent. Possible residues
must be flushed out of the circuits with a solvent (flushing agent) before commissioning.
WARNING
Incompatibility of flushing agent and working media!
Risk of explosion and danger of poisoning by toxic gases.
Examine the compatibility of the flushing and cleaning agents and working media
on the basis of the safety data sheets.
Always carry out basic flushing and the pressure tightness test:
– before putting the new system into operation for the first time (pumps are empty);
– before using the system again after prolonged storage;
– before servicing the system.
WARNING
Overpressure!
Risk of injury from bursting components.
The operating pressure must not exceed the value shown on the type plate.
Please note:
– Do not insert the nozzle into the gun yet. Gun secured.
– Keep the pump pressure as low as possible during flushing.
– Operating manuals for the affected components must be read and understood.
Process
1. Visual check: personal safety equipment, grounding and all devices ready to use.
2. Connect compressed air supply. Switch the system on.
3. Place the suction hoses of the three pumps in a grounded metal tank with flushing
agent. Use a separate, grounded, metal tank for each pump. Provide and ground an
additional, empty metal tank.
4. Place grounded metal tanks for return product under the return tube of each of the
pumps.
5. Close the pressure regulator of all of the pumps (0 MPa; 0 bar; 0 psi).
6. Select "Work" in main menu.
7.
Flushing and pressure tightness test for pump A:
7.1. Open return valve of pump A.
7.2. Slowly open ball valve of pump A.
7.3. Slowly turn up the air pressure on the pressure regulator of pump A. Only turn
up the air pressure until the pump is running normally (approx. 0–0.05 MPa;
0–0.5 bar; 0–7.25 psi). Be ready to switch from air to flushing agent and prevent
back spray.
7.4. Close the ball valve of pump A again as soon as clean flushing agent comes out.
7.5. Close the return valve of pump A again.
7.6. In sub-menu, select component "A"
A
and press [Start].
