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Operation
309474K 11
Operation
Flush Before First Use
Your pressure regulator has been tested in the factory
with an anti-corrosion liquid. Before using the regulator,
thoroughly flush the system with a solvent to remove
residue of this liquid as well as any contaminants that
have been introduced during assembly of the system.
Pressure Relief Procedure
1. Shut off the air to the pump.
2. Trigger the air spray gun to relieve the fluid pres-
sure.
3. Open the fluid drain valve to relieve all fluid pres-
sure, having a container ready to catch the drain-
age.
Adjusting the Regulator
The fluid pressure regulator controls pressure down-
stream from its outlet. The inlet fluid pressure should
always be higher than the outlet fluid pressure.
If you are using an accessory fluid pressure gauge, trig-
ger the air spray gun to relieve pressure in the line when
reducing the pressure, to ensure a correct gauge read-
ing.
Adjust the pump air pressure and the fluid pressure reg-
ulator for the best spraying combination.
In a circulating system, the back pressure valve controls
the fluid pressure upstream of its inlet in the same way.
Mechanical Regulator
1. Back out the adjustment screw until there is no
spring pressure.
2. Turn on the fluid supply, to admit fluid to the regula-
tor.
3. Turn the screw clockwise to adjust fluid pressure to
the desired level.
Pneumatic Regulator
1. With the fluid supply shut off, turn on the air pres-
sure to the regulator.
2. Turn on the fluid supply, to admit fluid to the regula-
tor.
3. Increase the fluid inlet pressure. When the fluid out-
let pressure is at the desired level, shut off the air to
the fluid regulator.
WARNING
Read the warnings on page 5, and follow the Pressure
Relief Procedure below whenever you:
• are instructed to relieve pressure
• stop spraying
• check or service any of the equipment
• install or clean the fluid nozzle.