1. What is Hydraulic Pump Motor Power?

Hydraulic pump motor power is the amount of mechanical power required to drive a hydraulic pump at a given flow rate and pressure, accounting for the system's efficiency. It's a critical parameter in hydraulic system design and component selection.

2. How Does the Calculator Work?

The calculator uses the hydraulic power equation:

Where:

• \( Flow\ Rate \) — Pump flow rate in gallons per minute (GPM)
• \( Pressure \) — System pressure in pounds per square inch (PSI)
• \( Efficiency \) — Overall efficiency of the pump (decimal from 0 to 1)
• 1714 — Conversion factor (PSI × GPM to HP)

Explanation: The equation calculates the theoretical power required, then divides by efficiency to account for energy losses in the system.

3. Importance of Power Calculation

Details: Accurate power calculation ensures proper motor sizing, prevents overload conditions, and helps optimize energy consumption in hydraulic systems.

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 efficiencies range from 0.8-0.95.

5. Frequently Asked Questions (FAQ)

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

Q2: What's a typical efficiency value?
A: Gear pumps: 0.8-0.85, vane pumps: 0.85-0.90, piston pumps: 0.90-0.95.

Q3: Should I add a safety factor?
A: Yes, it's common to add 10-25% to the calculated power for safety margin and future expansion.

Q4: Can I use this for metric units?
A: No, this formula is for US customary units. For metric (kW, bar, l/min), use: Power = (Flow × Pressure) / (600 × Efficiency).

Q5: Does this account for electric motor efficiency?
A: No, this calculates hydraulic power. For electric motor power, divide by motor efficiency (typically 0.85-0.95).