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Bioresource and Agricultural Engineering Commons™
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Full-Text Articles in Bioresource and Agricultural Engineering
Low-Pressure Testing: Pressure Regulating Valves, Charles M. Burt, Kyle Feist
Low-Pressure Testing: Pressure Regulating Valves, Charles M. Burt, Kyle Feist
BioResource and Agricultural Engineering
ITRC tested performance characteristics of pressure regulating valves from a variety of manufacturers. The purpose of the testing was to evaluate the ability of different models of valves to regulate the pressure in a low-pressure system. The testing concentrated on three specific valve performance characteristics: minimal variance from the target downstream pressure caused by changes in flow rate or inlet pressure; minimal hysteresis in outlet pressures; minimal pressure loss (at low inlet pressures) across the valve.
Low-Pressure Testing: Microirrigation Emitters, Charles M. Burt, Kyle Feist
Low-Pressure Testing: Microirrigation Emitters, Charles M. Burt, Kyle Feist
BioResource and Agricultural Engineering
ITRC tested 28 different pressure-compensating (PC) models of microirrigation emitting devices from a total of nine manufacturers in order to compare independent laboratory testing with manufacturer specifications. It is the intention of this report to investigate the ability of currently marketed products to operate in a truly low pressure irrigation system where energy inputs, in the form of pump discharge requirements, can be minimized.
Pressure Regulating Valve Pilot Characteristics - 2-Way Vs. 3-Way Pilots, Charles M. Burt, Kyle Feist
Pressure Regulating Valve Pilot Characteristics - 2-Way Vs. 3-Way Pilots, Charles M. Burt, Kyle Feist
BioResource and Agricultural Engineering
Pressure regulation valves, with 3” – 6” diameters, are commonly found at the entrance to agricultural irrigation blocks and manifolds. These valves are typical of a “hydraulic” design, in which a chamber above a flexible disc/diaphragm is filled or emptied. As the chamber is filled or emptied, the irrigation water passes through a smaller or larger orifice, and the pressure downstream of the valve is lowered, increased, or maintained at a constant target pressure. The flow in/out of the chamber is controlled by a small “pilot valve”. The characteristics of these pilot valves are discussed here, in general terms. Of …
Low Pressure Drip/Micro System Design – Analysis Of Potential Rebate, Charles M. Burt, Daniel J. Howes
Low Pressure Drip/Micro System Design – Analysis Of Potential Rebate, Charles M. Burt, Daniel J. Howes
BioResource and Agricultural Engineering
Drip/micro irrigation systems are often referred to as “low pressure” systems because the required emitter pressures are relatively low (6-12 psi). However, the pump discharge pressures of systems on flat ground throughout California average 40 psi. This report examines readily attainable system losses by examining individual components of the drip/micro system.