36
VERSION 01/2018
ORDER NUMBER DOC 2340851
Cobra 40-10 / 40-25
8.2.4 EMPTYING PUMP
WARNING
Gas mixtures can explode if there is an incompletely filled pump!
Danger to life from ying 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 o all heaters and let the product
cool o.
1. Visual check: personal safety equipment,
grounding and all devices ready to use.
6
1
9
2
7
4
5
B_04240
3
2. Place grounded collection tank (5) under the return
tube (4).
3. Place the suction hose (7) in an empty, grounded
tank (6).
4. Close pressure regulator (1) (0MPa; 0bar; 0psi).
Empty using return line
5. Open relief valve (3).
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.
0–0.05MPa; 0–0.5bar; 0–7.25psi).
9. As soon as working material is no longer owing
from the return tube (4), close ball valve (2).
10. Close relief valve (3).
Empty up to the gun
11. Point the gun, without nozzle, into tank (5) and open it.
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 owing from the return tube, close the ball valve (2).
14. Close and secure gun.
15. Depressurization in accordance with Chapter 7.4.
16. Dispose of the contents of the tank (5) according to the local regulations.
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