6-inch, single-stage, 600- and 1,250-GPM
Application of the Pump Graph. A common application of a pump graph
is its use in determining the rate of flow, efficiency, and brake
horsepower, given the total dynamic head in feet and the operating speed of
the engine in RPM. Rate of flow is the most commonly desired quantity on
the graph, and it can be expressed in GPM or BPH.
a. Figure 1.
Shows the Pump performance for a 6-inch, single-stage,
600-and 1,250-GPM self-priming pump. The 600-GPM pump is designed to pump
petroleum or potable water at a maximum operational output of 600-GPM at 150
PSI. The 1,250-GPM pump is designed to pump petroleum or potable water at a
maximum operational output of 1,250-GPM at 180 FTH or 66.2 PSI.
difference between the two pumps is the 600-GPM pump is designed for use
with the tactical hoseline; it operates at higher pressure but lower volume.
The 1,250-GPM pump is a flood and transfer pump designed to provide high
volume with low pressure to your 800-GPM mainline pump (IPDS). Using the
pump graph in Figure 1. Given a 6-inch, single-stage, 600-GPM self-priming
pump with a head capacity of 2,100 RPM; 35F API gravity; and a operating
pressure of 103 PSI, determine all other factors.
See Figure 1. to
determine the rate of flow and feet of head.