Metallisation MK 73, Operating Manual / Spare Parts List

Page: 26 / 64

Page 26 of 64
3.4 Extinguishing the Pistol
When finished spraying, follow the procedure below to correctly extinguish the pistol:

At the end of the spraying session, to extinguish the flame turn the pistol valve to the
OFF position (180° anti-clockwise in a single smooth movement) but hold the wire
feed trigger for approximately 1 second longer.
If the pistol is not going to be used for a period of time the gas must be switched off and
the hoses drained.

Shut off the gas and oxygen at the supply points.

Open the pistol valve to allow the lines to empty. Observe that the flowmeter floats
both fall to the bottom of the tubes.

Allow 15 seconds, and then shut off the air at the supply point.

ONLY when these steps have been completed should the extraction system be turned
off.

Remove the wire from the pistol, taking care to secure the leading end of the coil of
wire, and replace identification labels.

Leave the pistol valve open to avoid damaging the internal diaphragms.
WARNING
: When operating with the 3/16” Continuous Spray – High Throughput Nozzle
System, damage may occur to the nozzle parts unless the flame is extinguished by closing the
valve PRIOR to stopping the wire
.
3.5 Emergency Shut-Off Valve
In the event of the Emergency Shut-Off Valve being used, the following procedure should be
followed:

Immediately isolate all supplies.

Ensure that the Extraction System is on.

Check that the operating area is safe.

Re-open the Safety Valve.

The lines will purge.

Identify any fault that has required the Shut-Off Valve to be closed and remedy as
necessary.

Follow the “Starting to Spray Procedure” – Section 3.2 to begin spraying.
Do not shut the extraction down if gas is still present in the system.