38
VERSION 01/2018
ORDER NUMBER DOC 2316596
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 pump 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. Place grounded collection tank (5) under the
return tube (3).
open
closed
2. Place an empty, grounded collection tank (6)
under the pump.
3. Close pressure regulator (1) (0MPa; 0bar; 0psi).
Emptying via return line
4. Open return valve (3).
5. Slowly open the ball valve (2).
6. 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).
7. 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).
8. As soon as working material is no longer owing
from the return tube (3), close the ball valve (2).
9. Close return valve (3).
Emptying the product line
10. Relieve the system's pressure upstream of the valve (4) in accordance with the
superordinate operating manual. Open the valve (4).
11. Slowly open the ball valve (2). Be ready for the switch from working material to air.
12. As soon as no more working material is owing out of the system, close the ball valve (2).
13. Close the valve (4).
14. Depressurization in accordance with Chapter 7.4.
15. Dispose of the contents of the tank (5) according to the local regulations.
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