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VERSION 12/2018
11 FUNCTION TEST AFTER REPAIR WORK
After all repair work, the spray gun must be checked for safe condition before recommissioning.
The necessary scope of inspection and testing depends on the repair carried out and must
be documented by the repair personnel.
Assembly inspection
Activity
1. Leak test
– Connect 1 bar; 0.1 MPa; 14.50 psi and 8 bar; 0.8 MPa; 116 psi air pressure
to the air connection and product connection.
Place the spray gun completely into the water bath and check all sealing
points with 1 bar; 0.1 MPa; 14.50 psi and 8 bar; 0.8 MPa; 116 psi for leaks.
At 8 bar; 0.8 MPa; 116 psi bar, the gun must be completely sealed.
At 1 bar; 0.1 MPa; 14.50 psi, a slight leak can be tolerated: 5 air bubbles
per minute.
Injection and Final Inspection
Activity
2. Leak test
– Connect the spray gun, slowly increase the product pressure in increments
using a suitable medium until the maximum pressure specified is reached.
– Trigger and flush the spray gun multiple times.
With a control air of 5 bar; 0.5 MPa; 72.5 psi, the spray gun must open and
close properly. (5 times)
– Check the following:
– Is the product connection sealed when the gun is closed?
– Is the product valve sealed?
– Is there no product discharge at the valve rod seal?
ORDER NUMBER DOC 350941
GA 250AL_GA 400AL
Means
Air connection 1 bar / 8 bar
Water bath
Means
Visual inspection
Max. product pressure:
GA400
GA250
400 bar
250 bar
37
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