Contractor 15205, Instructions Manual

Page: 16 / 120

ENGLISH
CONTRACOR
®
Version 3.9 16
Picture. 3 . Metering valve adjustment
Push button OFF to switch off the exhauster.
Turn on/of switch to the position “0” to switch off the lights and filter pulse cleaning.
Shut off the air supply to the blast cabinet and drain air filter.
4.3. Adjusting
4.3.1 Blasting pressure
The pilot pressure regulator, located on the control panel of the cabinet, enables the
user to adjust the blasting pressure to suit the application.
The suitable pressure for most purposes is around 5-6 bar. Lower pressures may be
required on delicate substrates, and will reduce media breakdown. Higher pressure may be
required for difficult blasting jobs on durable substrates, but will increase media break down.
In all cases, highest production can only be achieved when pressure is carefully monitored.
Adjust air pressure by turning the knob on the pilot regulator located on the front of
the control panel. Pull the knob out, and turn clockwise to increase pressure or counter-
clockwise to decrease. Once operating pressure is set, push the knob in to lock.
4.3.2 Media metering
Media volume flow is adjusted
by the metering valve at the
foot of the blast machine. Close
metering valve SGV by rotating the
handle clockwise. To increase the
flow of media, rotate the handle
counterclockwise. Wait for the
flow to stabilize before further
regulation. The maximum flow rate
is reached when the handle is in
the full left position. Adjust flow
rate according to type and size of
blast media, blasting pressure, and
the task at hand, ensuring to use
as little media as possible whilst
still maintaining a high cleaning
Adjusting handle