The Injector
ADVANTAGES
The injector offers definite advantages over me-
chanically operated pumps when cold water
make-up is used to feed boilers. Some of these
advantages are:
Warm water is fed into the boiler without the
necessity of preheating the water.
It is not dependent upon an outside source of
power.
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Unit is compact, has no mechanically operated
parts and requires no foundation or floor space.
First cost and maintenance are low.
Operating steam is condensed and returned to the
boiler resulting in a thermal efficiency of nearly
100%.
Dependable in operation.
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Operating Principle of Penberthy Automatic Injectors
When steam supply valve is opened, steam passes
through steam jet into suction chamber, proceeds
through suction jet and out of the overflow. Steam,
which attains a velocity of approximately 2500 ft per
second as it leaves the steam jet, entrains the air in
suction chamber and creates a vacuum.
The vacuum created in suction chambe
begins to draw in water from supply line.
The water is now entrained by the steam
and a high velocity mixture of water and
steam passes through the suction jet and
out of the overflow.
The Injector may be defined as a b oiler feeding pump,
utilizing the velocity and condensation of a jet of steam
from the boiler to lift and force into the same boiler a jet
o water many times the weight of the original jet of
steam.
Although they are generally considered as boiler feed
pumps, injectors are also often used on other applica-
tions where hot water under high pressure is desired.
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NORTHEAST CONTROLS INCORPORATED
TEL: 201-419-6111 ext. 23 for Venturi Group
NORTHEAST CONTROLS INCORPORATED
TEL: 201-419-6111 ext. 23 for Venturi Group
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