AUTOMATIC in its action, unique in its simplicity and absolutely reliable in its time-tested design, the Penberthy Automatic Injector is the result of 40 years of careful manufacture and refinement.
The entire mechanism contains only two moving parts, both of which are simple heck valves built into the injector where they can never get out of adjustment or be subject to trouble.
All that is need to start it is to open the steam valve full, then open water supply valve full and adjust to point where it does not overflow. Without any other adjustment, the injector immediately draws up water from the supply tank, passes almost instantly through the five cycles illustrated below and continues to force a steady stream of water into the boiler until it is shut off. It is a perfect restarting, automatic machine. Once it is in operation, no attention is necessary to keep it going.
If the flow of water should be suddenly broken by any cause, such as a sudden jar or jolt as in the case of a traction engine or road roller, or in the case of a marine boiler by the vessel throwing the sea cock out of the water for a moment, the injector will pick up the water and again establish the steady flow into the boiler, automatically, without the manipulation of a single valve or the least attention from an attendant.
It is this quality which has made 'Penberthy' a by-wood among all engineers.
The Penberthy delivers water to the boiler at from 160 to 212 Fahrenheit, according to operating conditions. The stock model injector will start with steam pressures as low as 20 to 25 lbs, operating on a three foot lift. With from 60 to 80 lbs, steam pressure available it will operate on lifts of 20 to 24 feet. Special Injectors can be furnished to meet all conditions and requirements.
The Penberthy Injector Co. flyer which appears on pages 19, 20, 21 and 22 describes and shows how an injector works. The copy was sent to us by L. D. Solomon of 1205 E. Logan, Moberly, MO 65270, who thought it would be of interest to our readers.
WHEN THE STEAM VALVE IS OPENED HIGH VELOCITY STEAM RUSHES THROUGH- THE JETS OUT THE RING VALVE AND SPILL HOLE OPENINGS-AND ESCAPES THROUGH THE OVERFLOW VALVE
SUCTION CAUSED BY THE RUSHING STEAM NOW DRAWS WATER THROUGH THE SUPPLY PIPE WHERE IT COMES IN CONTACT -. WITH THE FLOW OF STEAM.
THECOLD WATER CONDENSES THE STEAM CREATING A PARTIAL VACCUM AT WHICH TIME THE RING VALVE CLOSES
ESCAPE OF WATER THROUGH SPILL HOLES DECREASES AS MIXTURE OF STEAM AND WATER' REACHES PROPER PROPORTIONS
HIGH VELOCITY PAST THE SPILL HOLES NOW TENDS TO DRAW IN AIR WHICH WOULD BREAK THE FLOW BUT THIS IS PREVENTED BY THE CLOSING OF THE OVERFLOW VALVE AND THE BUILT UP VELOCITY DRIVES THE WATER COMPLETELY THROUGH AND INTO THE BOILER.