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VERSION 04/2018
OPERATING MANUAL
8.2.4 EMPTYING PUMP
WARNING
Gas mixtures can explode if there is an incompletely filled pump!
Danger to life from flying parts.
Ignition of potentially explosive surrounding atmosphere.
Empty the device slowly and in a controlled manner.
Avoid potentially explosive atmosphere in the surroundings.
If the pumping product becomes heated, switch off all heaters and let the product
cool off.
1. Visual check: personal safety equipment, grounding and all devices ready to use.
2. Place empty, grounded tank (5a and 5b) under the return tubes (4a and 4b).
3. Place suction hoses (7a and 7b) in tanks with cleaning agent (6a and 6b).
4. Close pressure regulator (1) (0 MPa; 0 bar; 0 psi).
Emptying via return line
5. Open return valves (3a and 3b).
6. Slowly open the ball valve (2).
7. Slowly turn air pressure up on the pressure regulator (1) and only until the pump is
running normally (approx. 0.05 MPa; 0.5 bar; 7.25 psi).
8. Be ready for the switch from working material to air. Turn down pressure regulator
(1) far enough that the pump is still running normally (approx. 0–0.05 MPa; 0–0.5 bar;
0–7.25 psi).
9. Close ball valve (2) as soon as no more working product comes out of the return
hoses (4a and 4b).
10. Close return valves (3a and 3b).
Emptying up to the spray gun
11. Point the spray gun without nozzle in an empty, grounded residual product
container and pull the trigger.
12. Slowly open the ball valve (2). Be ready for the switch from working material to air.
13. As soon as working material is no longer flowing from the return tube, close the ball
valve (2).
14. Close and secure the spray gun.
15. Depressurization in accordance with Chapter 7.4.
16. Dispose of the contents of the tanks (5 and 5b) and the residual product container
according to the local regulations.
ORDER NUMBER DOC 2349980
Cobra 40-10 / 2K
38
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