until visibility decreases, which ever comes Àrst. At that point turn the pulse regulator to 4,5
bar, to start the normal pulsing cycle.
5.2.8 Pop-up Valve Seat Replacement
The rubber popup seat can be replaced after removing the blast vessel from cabinet
hopper (See blast vessel user manual). Remove the old seat by using a À nger, screwdriver, or
similar object, to work the seat out of the retainer groove. Push the new seat all the way through
the port and then À t it into the groove. For the last few millimeters pull up on the rubber seat and
allow it to « pop» into position.
30
Picture 12. Pop-up Valve and O-ring
Replacement
CONTRACOR
®
Version 2.3