14
General
The burner feed pipe 32-EH is particu-
larly suited for mounting to oil burners
and is designed for the operation of
return plate nozzles with needle shut-
off. The powerful spring of the driving
piston moves the shut-off needle into
closing position, thus always ensuring a
safe shut-off.
The driving piston is operated with oil
tapped from the supplied pipe, and its
opening function is controlled by the
solenoid valve of the hydraulic block.
The piston has a fixed travel.
The final position of the driving piston
can be checked hydraulically and incor-
porated into the control system of the
burner.
During the pre-ventilation of the burner,
the shut-off needle keeps the bore in
the nozzle plate closed and the oil circu-
lates in the feed pipe. When using
heavy fuel oil, the complete hydraulic
system is heated in the pre-scavenging
stage. When the solenoid is turned on,
or after a longer downtime, an imme-
diate atomizing and a perfect ignition
are ensured.
The burner feed pipe is suitable for sup-
ply pressures from 20 to 40bar and oil
temperatures up to 140°C. The ambient
temperature in the vicinity of the coil
should not exceed a temperature of
60°C.
SW 41
SW 41
SW 41
swirl chamber platee
adapter
mounting
rod
Needle open
Neddle closed
Nozzle plate
swivel nut
needle guidance
shut off needle
Nozzle rod linkage 32 - EH
Mounting the nozzle plates
The nozzle plate and the swirl chamber
plate should be installed according to
the attached sketch.
The sealing surfaces on the adapter, on
both sides of the swirl chamber plate
and on the nozzle plate must not be
damaged because this would endanger
the proper sealing. When sealing these
surfaces, never use material from other
manufacturers.
Remove the swivel nut from the feed
pipe, check that the needle guidance in
the swirl chamber plate is sliding pro-
perly over the needle head and place
the plates into the nut evenly in proper
position and proper sequence.
Now the nut together with the plates is
carefully placed over the needle and
tightened by hand as firm as possible.
The cap nut is firmly tightened with a
spanner. Spanner surfaces are provi-
ded on the adapter to counter with the
feed pipe when screwing down or off
the cap nut. These surfaces are desi-
gned for this purpose only!
