Zurich Herald, 1926-05-06, Page 3INCREASING SPRAYING EFFICIENCY
Some Details That Make a Great Difference in Results.
BY EDWARD HUTCIJINS;'
As the spraying season is here a spreading spray, which is better for
few important •essentials to successful i small trees, or may be changed to a
work may be, noted, Several things Jong, slender column that has greater.,.
are necessary in order to secure effi-!kapacity unci reaches the large trees
cient and satisfactory results. The more thoroughly. Most of thew, too,
proper material ial newt be applied at the tore supplied with a needle that forces
right thee and in the Peeper manner. obstructions out of the opening in the
Very much depends on the •last, and it ,'nozzle and prevents clogging.
Is r_pf this We Wish to write at this LEAK" IN 'IEELIEF VALVE,
time. Still another leak that sometimes
A good pressure with the pump is takes place and reduces the pressure
an important matter, and there are ,a is in the relief valve, although this is
number of things affecting this that not so common perhaps, as that in the
are so small as to escape the notice old-fashioned-ixlunger, and the wear in
of one who is not familiar with all of the nozzle, particularly if the amount
the detail's of the operation. For, if of liquid delivered is properly adjust -
from any cause the pressure is too low, t ed. If more m'ateria'l passes through
a Shower is produced insteadof a fine . the pump than the nozzle will deliver,
foist, and the results are not so good. ' the excess must go through the relief
Nor are tall .parts of the tree reached',valve and this causes wear. Some -
as the carrying capacity is much less. 1 times oensiden able trouble is caused in
I•f a person has •a hand pump equipped this way, especially if one hasn't had
with the proper nozzle, •a pressure of much ex rience with spray rigs and
;eighty to 100 pounds may be obtained,' has not"xearned a14 about these hing8.
• and fairly good work may be done' The hale in the nozzle should be the
with such an outfit, but in commercial I proper size,,='to deliver about all the
orchards power rigs are in general pump supplies and still keep, up the
use, and with the quantiy of material pressure, :and, of course, this means
these put out a much higher pressure that the pump should be bought of the
must be maintained. Experienced, probe'` capacity to rn$et the buyer's
orehardists agree, I think, that from needs. A larger pump is required to
225 to 250 pounds is about right. Some. run two leads of, hose than if the work
think 300 pounds none too low, but my I is to be done -by one person. This can
own opinion is that equally as good re- • e governed to a considerable extent,
however, by regulating the speed of
the engine. The wearing parts of re-
lief valves can usually be renewed at
small cost, but this is a matter that
requires attention. If the pressure
runs down; and there is no leak past
• sults are obtained with the lower pres-
sure mentioned, and when it runs
above-- 250 pounds the troubles with
bursting horse .and various Teaks in
connections and points, both in hose
and pump,'rapidly increase.' Experi-
ments have been made with pressures the plungers, and the opening in the
•ail the way as high as 800 pounds, and noziie is not too large, then the difii-
careful observations may show sem°
economies in waving both in .material
and time, but with the ordinary
orchardists these are too ,small to be
very important, end such high pres-
•sures are hardly feasible..
CAUSE OF DECREASED PRESSURE.
But a characteristic of spray rigs
generally is that while the pressure
may be—and usu: