Which net discharge pressure corresponds to 70% discharge?

Which net discharge pressure corresponds to 70% discharge?

• A. 150 psi
• B. 250 psi
• C. 180 psi
• D. 200 psi

Answer: (D)

Net discharge pressure is the pressure you see at the discharge when a certain percentage of the pump’s capacity is being used. The MWS discharge curve ties how much flow you’re delivering (the percent discharge) to the pressure needed at the outlet after accounting for hose and fitting losses. At about 70% of the pump’s capacity, the curve for the standard MWS setup sits around 200 psi. That’s why 200 psi is the correct match for 70% discharge—the pressure falls at the middle-to-upper range of the curve where a seven-tenths flow typically requires roughly two hundred pounds per square inch. The other pressures reflect either lower or higher fractions of discharge on that same curve, making them less consistent with the 70% point.

Net discharge pressure is the pressure you see at the discharge when a certain percentage of the pump’s capacity is being used. The MWS discharge curve ties how much flow you’re delivering (the percent discharge) to the pressure needed at the outlet after accounting for hose and fitting losses. At about 70% of the pump’s capacity, the curve for the standard MWS setup sits around 200 psi. That’s why 200 psi is the correct match for 70% discharge—the pressure falls at the middle-to-upper range of the curve where a seven-tenths flow typically requires roughly two hundred pounds per square inch. The other pressures reflect either lower or higher fractions of discharge on that same curve, making them less consistent with the 70% point.