. Chemical weed-control equipment. Weeds; Spraying; Spraying equipment. PRESSURE REGULATOR PUMP BOOM f QUICK SHUT-OFF^ VALVE REFILL VALVE. DIAPHRAGM TYPE PRESSURE REDUCING VALVE U ffl Diagram of a weed sprayer using a positive displacement pump. Plunger and gear, and certain types of rotary pumps, are positive displacement types, and do not need priming. They do need a by-pass valve or pressure regulator to relieve the pump when the spray nozzles are shut off. This pump has been adapted for low- pressure weed spraying by insertion of a diaphragm type reducing valve in the boom feed line. This
. Chemical weed-control equipment. Weeds; Spraying; Spraying equipment. PRESSURE REGULATOR PUMP BOOM f QUICK SHUT-OFF^ VALVE REFILL VALVE. DIAPHRAGM TYPE PRESSURE REDUCING VALVE U ffl Diagram of a weed sprayer using a positive displacement pump. Plunger and gear, and certain types of rotary pumps, are positive displacement types, and do not need priming. They do need a by-pass valve or pressure regulator to relieve the pump when the spray nozzles are shut off. This pump has been adapted for low- pressure weed spraying by insertion of a diaphragm type reducing valve in the boom feed line. This is necessary if the main by-pass regulator will not work be- low 100 psi. A by-pass regulator must always be included in the line of a posi- tive displacement pump. The tank is backfilled by attaching a suction hose to the refill valve, which is then opened. Valve "B" is also opened, and valve "A" is closed. This forces the liquid back into the tank. [7]. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Akesson, Norman B. (Norman Berndt), 1914-; Harvey, W. A. (William Alfred), 1914-1989. Berkeley, Calif. : University of California, College of Agriculture, Agricultural Experiment Station
Size: 1647px × 1516px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookpubli, booksubjectspraying, booksubjectweeds
