1. What is Hydraulic Horsepower?

Hydraulic horsepower is the power required to drive a hydraulic pump that delivers a specific flow rate at a certain pressure. It's crucial for selecting the right motor size for hydraulic systems.

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 from 0 to 1)
• 1714 — Conversion factor (PSI·GPM to HP)

Explanation: The formula accounts for the relationship between flow, pressure, and efficiency to determine the mechanical power needed.

3. Importance of Hydraulic HP Calculation

Details: Proper horsepower calculation ensures the motor isn't undersized (which could cause failure) or oversized (which wastes energy and money).

4. Using the Calculator

Tips: Enter flow rate in GPM, pressure in PSI, and efficiency as a decimal (e.g., 85% = 0.85). Typical pump efficiency ranges from 0.8-0.95.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical efficiency value for hydraulic pumps?
A: Gear pumps: 0.8-0.85, vane pumps: 0.85-0.90, piston pumps: 0.90-0.95.

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

Q3: Should I add a safety factor to the calculated HP?
A: Yes, typically 10-25% depending on application and duty cycle.

Q4: How does viscosity affect the calculation?
A: Higher viscosity fluids may reduce pump efficiency, requiring more HP.

Q5: Can this be used for electric motor sizing?
A: Yes, but consider motor efficiency and service factor when selecting.