Load on Gland Calculator

Load by Gland Formula:

\[ F_{Gland} = \frac{\pi}{4} \times p \times (d_{sb}^2 - d_{shaft}^2) \]

Design Pressure of Stuffing Box:

Internal Diameter Stuffing Box:

Diameter of Shaft:

Tolerance:

Load by Gland (N):

Tolerance Range (N):

1. What is Load on Gland?

Definition: Load by Gland is the term applied when some form of spring energization is included in the gland bolting system.

Purpose: It helps engineers determine the appropriate load needed for proper sealing in stuffing box applications.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ F_{Gland} = \frac{\pi}{4} \times p \times (d_{sb}^2 - d_{shaft}^2) \]

Where:

\( F_{Gland} \) — Load by gland (Newtons)
\( p \) — Design pressure of stuffing box (Pascals)
\( d_{sb} \) — Internal diameter of stuffing box (meters)
\( d_{shaft} \) — Diameter of shaft (meters)

Explanation: The formula calculates the force required based on pressure and the annular area between the stuffing box and shaft.

3. Importance of Load Calculation

Details: Proper load calculation ensures effective sealing without excessive friction that could damage the shaft or packing.

4. Using the Calculator

Tips: Enter the design pressure, stuffing box internal diameter, shaft diameter, and tolerance percentage (default ±5%). All values must be > 0 except tolerance which can be 0.

5. Frequently Asked Questions (FAQ)

Q1: What is the typical tolerance percentage?
A: Most applications use ±5% tolerance, but this can vary based on specific requirements.

Q2: How do I measure the stuffing box diameter?
A: Measure the internal diameter of the stuffing box where the packing will be installed.

Q3: What units should I use?
A: The calculator uses SI units - Pascals for pressure and meters for diameters.

Q4: Does this include safety factors?
A: No, the calculation provides theoretical load. Apply appropriate safety factors based on your application.

Q5: What if my shaft diameter is larger than stuffing box?
A: The calculation won't work - shaft diameter must be smaller than stuffing box diameter.