Replacement Of Parts; Preventive Maintenance - DeVilbiss HGB-509 Manual De Instrucciones

OPERATION
Pneumatic adjustment regulator
For models HGB-510-R1, R2 or R4
The fluid pressure regulation is adjusted by remote air pressure
regulator, for that connect Rilsan tube on the top connector on
cover. To flush the regulator, connect air tube on the side connector
(R1/R2/R4) and set the air pressure to full open the valve regulator.
It's useful to fit the air regulator close to the fluid regulator to
obtain the accurate regulation at a low fluid flow. If it's not the
case, you can obtain this accurate regulation in piercing the Rilsan
tube with sewing needle near of the connector to create a small
air leakage.
To flush the fluid line with solvent, connect the flushing air
command to the right connector on the side of the regulator.
DO NOT EXCEED THE FLUSHING AIR COMMAND MORE
THAN 1 BAR OVER THE SOLVENT PRESSURE.
Note: To come back at the initial set up after cleaning operation,
purge the air line so to have no air pressure on intermediary
chamber. This intermediary chamber can be used as a safe area if
the membrane brakes and fluid leakage goes through the air line.
To know and differentiate what is your regulator model, an arrow
is marked above the cover which is either in direction of the
flushing air inlet connector for the R1 model or in direction of the
1/ 4 or 1/ 2 printed on the intermediary plate. Take care during the
re assembling operation after maintenance to fit the cover in the
right place corresponding to the model of regulator used.

PREVENTIVE MAINTENANCE

Periodic cleaning of regulator with a solvent compatible with the
material being used is recommended. To clean material from the
regulated material line and the regulator, these steps should be
followed:
1. Relieve supply line pressure.
2. Put the regulator in flushing position (See "Operation"). This
holds the valve off its seat.
3. Blow material back through the regulated line by introducing
air pressure into the line down stream from the regulator. With
spray gun attached this can be done by loosening air cap ring
on gun, holding a rag over air cap and pulling gun trigger. This
forces air in a reverse path through spray gun and air forces
material back through regulated material line.
4. Unscrew the fluid inlet connector remove the spring and the
ball valve. Clean all the parts and the gasket inside the valve
body. If the gasket is damaged replace it. Please follow the
instruction described on page 6. If the gasket is ok put thread
locking compound (loctite 222) on the connector thread and
tighten to a maximum torque of 6.4Nm.
Periodically clean exterior of regulator with solvent soaked rag.

REPLACEMENT OF PARTS

Relieve the line pressure before servicing for pneumatic model
(HGB-510). For manual model HGB-509 & 609, Relieve spring
forces by unscrewing the adjusting screw rep 4 at the maximum
(FIG A).
TO REPLACE DIAPHRAGM
1. Remove the 6 hex. head cap screws.
2. The diaphragm is sold complete with its washer and its fluid
flow plastic deflector. These parts could be not separated, if
diaphragm or the deflector is damaged replace it.
3. Install the new diaphragm kit into the regulator body.
4. Put the cover on the regulator and screw the 6 screws at 7.5 to
8 mN.
5. For the pneumatic model HGB510, reassemble all the parts in
the right order and position. It's recommended before to set
the regulator that the two diaphragms work about 10 time so
to be in full condition, this operation could be done in using
the connector Rep 8 and pressurize the flushing cavity at 4 bar.
TO SERVICE VALVE ASSEMBLY
"Perlast D shape" seat and Ball valve.
1. Unscrew the fluid inlet valve and connector rep 16 from the
regulator body.
2. Clean and check the valve, if the parts are damaged, replace the
parts in using the valve kit.
3. Fit the washer in the right position small dimension in front of
the "D" gasket, Screw the valve body on the regulator body
with a sealing compound "loctite 270" on the third thread and
tight at maximum torque 12Nm, Do not exceed this torque,
over torque will damaged the regulator body.
4. Wait a few minutes for the loctite to dry and fit the ball valve
and the spring
5. Clean the thread on the fluid inlet connector, use a thread
locking compound like Loctite 222.
6. Apply a maximum torque 6.4Nm.
6 / 7 SB-6-HGB-R (11/2015)