Quick Answer
The api rp 682 mechanical seal face pressure (balanced seal) calculator computes seal face pressure from the input values you provide.
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Find Engineering Solutions →Result Interpretation
API RP 682 Mechanical Seal Face Pressure (Balanced Seal) calculator computes Seal Face Pressure in Pa using the defined engineering formula and the input values provided. Seal Face Pressure is expressed in Pa. No universal acceptance threshold is defined by this calculator.
Worked Example
Verified calculation
Given:
- Spring Load Pressure = 300000
- Stuffing Box Pressure = 1000000
- Balance Ratio = 0.65
- Seal Balance Ratio (Dimensionless) = 0.7
Expected Result:
- Seal Face Pressure = 3166666.6666667
Engineering Interpretation:
Under the given input conditions, the calculated result is: Seal Face Pressure = 3166666.6666667 Pa.
The actual numerical result is computed by the Runtime engine using the persisted tool definition. The values shown here come from deterministically validated test cases.
Formula / Method
seal face pressure = (spring load pressure + balance ratio * stuffing box pressure) / (1 - Dimensionless)Seal Face Pressure.
Variables
| Symbol | Label | Role | Description |
|---|---|---|---|
| P_s | Spring Load Pressure | INPUT | Spring Load Pressure |
| P_box | Stuffing Box Pressure | INPUT | Stuffing Box Pressure |
| K_b | Balance Ratio | INPUT | Balance Ratio |
| B | Seal Balance Ratio (Dimensionless) | INPUT | Seal Balance Ratio (Dimensionless) |
| seal_face_pressure | Seal Face Pressure | OUTPUT | Seal Face Pressure |
Calculation Steps
- Enter the spring load pressure in Pa.
- Enter the stuffing box pressure in Pa.
- Enter the balance ratio in 1.
- Enter the seal balance ratio (dimensionless) in 1.
- Step 1: Compute seal face pressure.
- Read the seal face pressure (Pa) from the results.
Frequently Asked Questions
What does this calculator calculate?
The API RP 682 Mechanical Seal Face Pressure (Balanced Seal) calculator estimates Seal Face Pressure based on the input parameters you provide
Why is spring load pressure important in this calculation?
spring load pressure is directly proportional to seal face pressure. When you enter spring load pressure in Pa, the calculator uses it in the engineering formula to compute the output
How should I interpret the result seal face pressure?
The calculator outputs seal face pressure in Pa. For higher pressures, divide by 1000 to express in kPa, or by 101325 for atmospheres. The result is computed directly from the input values using the defined engineering formula
What units should I use for the inputs?
Enter each value in the units shown next to the input field: Spring Load Pressure (Pa), Stuffing Box Pressure (Pa). Make sure all inputs use the specified units for consistent results
What assumptions does this calculator use?
This calculator uses automatically validated engineering formulas. Results are approximate and should be validated against site-specific conditions, applicable codes, and professional engineering judgment
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