Belding banner. (Belding, Mich.) 1889-1918, 1912-05-16

A great many men treat their
nozzles something like this: A
spray nozz g sho I'D give fine
spray with the same disk used al
last season, Ii sho I'D never need
new disks, never need new pack
ing, il never needs cleaning, but
should do perfect work, even
though stopped rp wi h leaves,
twigs, straw AMI other things
TINT got in because the top II
the tank wasn't covered, or
would have been caught by the
strainer, on'y the strainer had a
hoe punched in it last winter and
wasn't mended yet.
Don't expect a neglected nozzle
to do good work 1t can't. 1t
shou d be washed IT with clean
water every night. The best way
to do this is TO pull the suction
hose out OF the tank, sti. * ii in
clean water, and then run the
pump unit! clean water comes
through the nozze.
A spray noZZ should have a
disk with a small hoe, if a fine
spray at reasOnab e pressure is ex-
pected. Disks viii wear out.
Have plenty Of extra ones and
use them. Keep the tank clean and
strain the solutions into il. II is
easier to keen sediment and
trash out of the tank than to
Pick it ont of the nozz es.
The nozz,e is the business end OF
the whole outfit. For it we have
engine, pump, and hose. 1t deter
mines the pressure TO be carried
and the pressure determines
the size of the engine, the
grade of the hose, the wear on
disks. High pressures are re-
sposib.e for good many OF the
troub es of the spray rig. Are
nozz'es now available giving good
sprays at as low pressares as th.y
should?
The whir'ing spray nozzle at
tains its results by using ceutrif-
ugal force to send the liquid into
the air in thin, conicai sheet,
when the resistance OF the air
tears this thin sheet into a fine
mist. This nozzle gives little or
no spray in the center of the cone.
Attempts are being made to put
a center into the cone, the genral
plan adopted being to interfere
with the smooth whiriing liquid
inside the nozze, churn it into a
froth, and bow it by main
strength sputtering into the air.
The throat passage is put there
to direct a JET into the eddy
chamber There is needless loss OF
pressure in getting the liquid into
this passage if the edges Of the
opening are not rounded.
I he Jet should he smoothly turned
SO it viii be directed into the
eddy chamber in the direction in
which the liquid must whirl. Pres
sure is lost in throat passages
with sharp turns. The shape Of
the jet after leaving the throat
passage must be rectangular, in
order to fit into the spiral in
which the liquid VIII rls.
Now suppose there are two
throat openings into the eddy
chamber and that this chamber is
a true circ inside. What be-
comes of the stream shot in from
the throat? 1t follows the out
side of The eddy chamber, of
course, until it comes TO the
second throat opening, and there
If the opening is not protected n
some way it strikes squarely into
the stream coming out at that
point. Result! Eddy and froth.
stoppage of the whirl and loss of
more pressure. The same thing is
going on at the other side OF the
nozzle.
To sum up, the points l wish to
emphasize as essential to the de-
sign of a successful low pressure
nozzle are: 1, Easy entry into
the throat passages; 2, gradual
turning of the stream in these
passages toward the eddy cham
Der, 3, a rectangular stream; l.,
spiral sides to eddy chamb ,r.
Lastly, no nozzle will do good
work unless treated right.