K_SWING_CHECK_VALVE

Overview

Calculate the loss coefficient (K) for a swing check valve using the Crane method.

Excel Usage

=K_SWING_CHECK_VALVE(D, angled)

• D (float, required): Diameter of the pipe attached to the valve [m]
• angled (bool, optional, default: true): If true, angled swing check valve (K is 2x straight)

Returns (float): Loss coefficient K for the swing check valve [-]

Examples

Example 1: Angled swing check valve

Inputs:

D
0.02

Excel formula:

=K_SWING_CHECK_VALVE(0.02)

Expected output:

Result
2.3974

Example 2: Straight swing check valve

Inputs:

D	angled
0.02	false

Excel formula:

=K_SWING_CHECK_VALVE(0.02, FALSE)

Expected output:

Result
1.1987

Example 3: Large angled swing check valve

Inputs:

D
0.1

Excel formula:

=K_SWING_CHECK_VALVE(0.1)

Expected output:

Result
1.6288

Example 4: Large straight swing check valve

Inputs:

D	angled
0.1	false

Excel formula:

=K_SWING_CHECK_VALVE(0.1, FALSE)

Expected output:

Result
0.8144

Python Code

import micropip
await micropip.install(["fluids"])
from fluids.fittings import K_swing_check_valve_Crane as fluids_k_swing_check

def k_swing_check_valve(D, angled=True):
    """
    Calculate the loss coefficient (K) for a swing check valve using the Crane method.

    See: https://fluids.readthedocs.io/fluids.fittings.html#fluids.fittings.K_swing_check_valve_Crane

    This example function is provided as-is without any representation of accuracy.

    Args:
        D (float): Diameter of the pipe attached to the valve [m]
        angled (bool, optional): If true, angled swing check valve (K is 2x straight) Default is True.

    Returns:
        float: Loss coefficient K for the swing check valve [-]
    """
    try:
        D = float(D)
    except (ValueError, TypeError):
        return "Error: D must be a number."

    if D <= 0:
        return "Error: D must be positive."

    try:
        result = fluids_k_swing_check(D=D, angled=angled)
        return float(result)
    except Exception as e:
        return f"Error: {str(e)}"

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