Magnum Venus Plastech GMX-2000 GRANIT COAT GUN - Manual (Page 11)

11
SHUT DOWN PROCEDURES FOR SPRAY EQUIPMENT
1. Trigger gun until pump shaft is in the full down position (at bottom of stroke
position).
2. Engage gun trigger lock.
3. Relieving pressures:
a. Close main air valve to system.
b. Purge excess air from system by relieving air from the bottom of the air
filter or water trap.
c. Catalyst pressure: “Dump” or relieve catalyst pressure at catalyst manifold
(if applicable) by opening catalyst ball valve. Pressure will immediately be
relieved. Close the ball valve at once to avoid draining of catalyst from
catalyst line.
d. Material pressure: Place a container under material ball valve at bottom of
fluid filter assembly to catch material flow when relieving pressure. Slowly
open material ball valve to relieve pressure.
Remember - the pump is under extreme pressure. Use the utmost caution when opening
the valve to avoid injury or being sprayed with material. Once material pressure is
relieved, close ball valve.
4. Remove catalyst and material tip assemblies from head of gun and clean
thoroughly.
5. Thoroughly clean diffuser cavity in front of gun head.
6. Inspect entire gun and equipment for over spray and clean.
System is now “shut-down” and ready for the next start-up
Important Notes:
 When cleaning gun with solvents, avoid getting solvent in exhaust port of “air
trigger” gun by covering port with thumb or finger while cleaning and pointing
gun downward.

Proper cleanliness habits of your spray equipment goes a long way in keeping
down unnecessary maintenance and repair costs.
AIR PRESSURES
1. Air requirement recommendations:
a. A minimum of 100 psi on main air.
b. 20 - 30 CFM for chopper systems
2. Material pump: 30 - 50 psi
3. Catalyst Atomizing Air: Catalyst atomizing air should be balanced generally
between a range of 15 - 25 psi. It should be low enough to reduce catalyst over-
spray and high enough to atomize catalyst efficiently. This allows user to attain
and operate under optimum efficiency.