1. What is Hydraulic Pump Horsepower?

Hydraulic pump horsepower is the power required to drive a hydraulic pump that delivers a specific flow rate at a certain pressure. It accounts for the pump's efficiency in converting mechanical power to hydraulic power.

2. How Does the Calculator Work?

The calculator uses the hydraulic horsepower formula:

Where:

• \( Q \) — Flow rate in gallons per minute (GPM)
• \( P \) — Pressure in pounds per square inch (PSI)
• \( \eta \) — Pump efficiency (decimal between 0 and 1)
• 1714 — Conversion factor (PSI × GPM to HP)

Explanation: The formula calculates the theoretical power required and then divides by efficiency to get actual power needed.

3. Importance of Horsepower Calculation

Details: Proper horsepower calculation ensures you select a motor powerful enough to drive the pump at required flow and pressure without overloading.

4. Using the Calculator

Tips: Enter flow rate in GPM, pressure in PSI, and pump efficiency (typically 0.85-0.95 for good pumps). All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical efficiency value?
A: Most hydraulic pumps have efficiencies between 0.85-0.95 (85%-95%). Gear pumps are typically 0.85-0.90, while piston pumps can reach 0.95.

Q2: Why is the conversion factor 1714?
A: It comes from (550 ft-lb/sec per HP) × (12 in/ft) / (231 in³/gal) = 1714 (PSI × GPM per HP).

Q3: What if my pressure is in bar?
A: Convert bar to PSI first (1 bar = 14.5038 PSI) before using the calculator.

Q4: Should I add a safety factor?
A: Yes, it's common to add 10-20% to the calculated HP to account for system losses and future demands.

Q5: How does viscosity affect horsepower?
A: Higher viscosity fluids may require more power due to increased friction losses, which would be reflected in lower efficiency.