If you have a duplex double acting...

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Question 1 of 205eccef9bbacbc34ba4d4552a

If you have a duplex double acting reciprocating pump making 150 strokes/minute, with a 6" diameter cylinder, a 4" stroke and operating with 95% volumetric efficiency, what is the capacity of this pump?

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🔍 Key Concepts

• Pump displacement per stroke for a reciprocating pump (using cylinder area and stroke length) • Difference between single-acting, double-acting, and duplex in terms of how many discharges per revolution/stroke cycle • Converting cubic inches per minute to gallons per minute (gpm) and applying volumetric efficiency

💭 Think About

• How do you calculate the volume of liquid moved by one stroke of a single cylinder using its diameter and stroke length? • For a duplex double-acting pump making 150 strokes per minute, how many effective discharging strokes occur each minute across all cylinders? • Once you have total volume per minute in cubic inches, how do you convert that to gallons and then adjust it for 95% volumetric efficiency?

✅ Before You Answer

• Be sure you understand that double-acting means pumping on both sides of the piston, and duplex means two cylinders • Confirm the formula for cylinder volume: Area = π × (D²/4) and Volume per stroke = Area × Stroke length (all in inches) • Verify the unit conversion: 1 gallon = 231 cubic inches before choosing the closest gpm value

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