 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
FORTNIGHTLY BOATSHOP PHOTO LOG
|
|
|
|
|
|
|
|
 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
UNDERSTANDING INJECTORS seems to be
a black or white situation. Some steamers swear by injectors, as
the most convenient and efficient means of filling a boiler under
pressure, while others just swear at their injectors.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
The amount of text and drawings that we will
present here will run into several pages hence will continue from issue
to issue. You are invited to print out any or all of the issues
so that you may have a complete, easy to read text for your own use.
|
|
|
|
|
|
|
 |
|
|
|
|
|
|
|
|
|
|
OPERATING
PRINCIPLE
of Penberthy
Automatic Injectors:
|
|
|
|
|
|
|
|
|
|
|
|
|
|
 |
|
|
|
|
|
|
|
|
Above to Left: 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.
To Left: The vacuum created in suction chamber 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.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
To Left: When the amount of steam and water reach
the proper proportion, the steam gradually condenses as the mixture
advances through injector. Upon reaching delivery jet parallel
the mixture is fully condensed.
Below: The energy contained in the water passing through delivery
jet is sufficient to build up a pressure, greater than the boiler
pressure, causing water to flow through the discharge check valve into
the boiler. When flow into the boiler is established the overflow
valve closes automatically and prevents the entrance of air which would
disrupt operation of injector. Total operating cycle requires
only a few seconds.
|
|
|
|
|
|
|
|
 |
|
|
|
|
|
|
|
|
|
 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
 |
|
|
|
|