1. What is Specific Weight in Hydraulics?

Definition: Specific weight (γ) represents the weight per unit volume of a hydraulic fluid.

Purpose: It's a crucial parameter in hydraulic system design, helping engineers calculate pressures, forces, and fluid behavior.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( \gamma \) — Specific weight (lb/ft³)
• \( \rho \) — Fluid density (lb/ft³)
• \( g \) — Gravitational acceleration (32.174 ft/s²)

Explanation: The fluid density is multiplied by gravitational acceleration to determine the weight force exerted by the fluid per unit volume.

3. Importance of Specific Weight

Details: Specific weight affects pump selection, pressure calculations, and system performance in hydraulic applications.

4. Using the Calculator

Tips: Enter the fluid density in lb/ft³ and gravitational acceleration (default 32.174 ft/s²). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between density and specific weight?
A: Density is mass per unit volume, while specific weight is force (weight) per unit volume.

Q2: What's a typical specific weight for hydraulic oil?
A: Most hydraulic oils have γ ≈ 53.5 lb/ft³ (density ~1.66 lb/ft³ × 32.174 ft/s²).

Q3: When would I need to change the gravity value?
A: Only for applications in different gravitational fields (e.g., space applications).

Q4: How does temperature affect specific weight?
A: As temperature increases, density decreases, thus reducing specific weight.

Q5: Can I use this for other fluids besides hydraulic oil?
A: Yes, this formula works for any fluid when you know its density.