Agriculture Reference
In-Depth Information
iron or bronze.
Figure 8.15B
diagrams the movement of fluid in centrifugal
pumps.
Figures 8.15 A and B
Figure A illustrates the diaphragm pump and B the
centrifugal pump.
e.
Piston Pumps
Piston pumps are the most expensive of the commonly used sprayer
pumps. They deliver low to medium volumes (2 to 60 gam) at low to high
pressures (20 to 800 pi). Used for high-pressure sprayers or when both low
and high pressures are needed, piston pumps are positive-displacement,
self-priming pumps. They have replaceable piston cups made of leather, neo-
prene, or nylon fabric which make the pump abrasion-resistant and capable of
handling wettable powders for many years. The cylinders are iron, stainless
steel, or porcelain-lined. The pump casing is usually iron.
3.
Strainers (Filters)
Pesticide mixtures should be filtered to remove dirt, rust flakes, and other
foreign materials from the tank mixture. Proper filtering protects the working
