hydraulics is defined as the study of fluid behavior, at rest and in motion properly designed piping...
TRANSCRIPT
Hydraulics
• is defined as the study of fluid behavior, at rest and in motion
• Properly designed piping with sound hydraulics can:
- Greatly reduce maintenance problems over the life of an irrigation system.
- Reduce installation cost
Static water pressure
Dynamic water pressure
The industry has established 5 ft/s as an acceptable maximum velocity.
• Velocities less than 5 ft/s are less likely to cause damaging surge pressures
• Pressure losses due to friction increase rapidly as velocities increase beyond 5 ft/s
Calculating water meter capacityand working pressure
• The pressure loss through the water meter should not exceed 10% of the minimum static water pressure available
• The maximum flow through the meter for irrigation should not exceed 75% of the maximum safe flow of the meter
• The velocity of flow through the service line should not exceed 5 to 7-1/2 ft/s
Find critical circuit path – the path with the most pressure loss