Final answer:
A pressure reducing valve has three modes of operation: flow-through, variation of pressure with depth in a fluid, and different characteristics of valves.
Step-by-step explanation:
A pressure reducing valve has three modes of operation:
- In the flow-through mode, water is drawn in through a lower valve and pumped out through an upper opening, allowing 300% of the tank capacity to flow through.
- The variation of pressure with depth in a fluid is another mode of operation, which is based on Pascal's Principle. It involves the measurement of gauge pressure, absolute pressure, and pressure at different depths.
- The third mode of operation involves different characteristics of valves, such as thin-walled vs. thick-walled, large lumens vs. small lumens, and presence or absence of valves. For instance, valves with thin walls, small lumens, and high pressure have valves, while those with thick walls, large lumens, and high pressure lack valves.