1. What is Hydraulic Pump Horsepower?

Hydraulic pump horsepower is the power required to drive a hydraulic pump at a given flow rate and pressure, accounting for the pump's efficiency. It's essential for selecting the right motor to power the hydraulic system.

2. How Does the Calculator Work?

The calculator uses the hydraulic horsepower formula:

Where:

• \( HP \) — Horsepower (output)
• \( Q \) — Flow rate in gallons per minute (GPM)
• \( P \) — Pressure in pounds per square inch (PSI)
• \( \eta \) — Pump efficiency (decimal, typically 0.8-0.9)
• 1714 — Conversion factor

Explanation: The formula calculates the theoretical horsepower required, then divides by efficiency to account for energy losses in the pump.

3. Importance of Horsepower Calculation

Details: Proper horsepower calculation ensures you select a motor powerful enough to drive the pump without overloading, while avoiding excessive oversizing which wastes energy and money.

4. Using the Calculator

Tips: Enter flow rate in GPM, pressure in PSI, and pump efficiency (typically 0.85 if unknown). All values must be positive numbers (efficiency between 0.1-1.0).

5. Frequently Asked Questions (FAQ)

Q1: Why is 1714 used in the formula?
A: It's the conversion factor to convert (GPM × PSI) into horsepower (1 HP = 1714 (GPM × PSI) theoretically).

Q2: What's a typical efficiency value?
A: Gear pumps: 0.80-0.85, vane pumps: 0.85-0.90, piston pumps: 0.90-0.95. Use 0.85 if unsure.

Q3: Should I add a safety factor?
A: Yes, it's common to add 10-25% to the calculated HP to account for startup loads and contingencies.

Q4: How does viscosity affect horsepower?
A: Higher viscosity fluids require more horsepower, especially at startup when the fluid is cold.

Q5: Can this be used for hydraulic motors?
A: The same formula works for motors, but efficiency values may differ (typically lower than pumps).