How do you select K factor for sprinklers?

How do you select K factor for sprinklers?

K-Factor formula for fire sprinklers

1. Q = AV.
2. Q = A√(2gh)
3. q = kp0.5
4. k = q / p0.5
5. p = ( q / k )2
6. for metric calculations: p = pressure in Bar. q = flow in litre per minute. k = discharge constant Lpm/Bar0.5
7. and for imperial calculation: p = pressure in psi. q = flow in gpm. k = discharge constant gpm/psi0.5

How are fire sprinkler heads rated?

Automatic sprinklers have different temperature ratings at which their fusible or glass bulb element is expected to break, enabling water to flow onto a fire. The temperature rating closely tracks rising ceiling temperatures, with options ranging from 135° F all the way up to 650° F (57° to 343° C).

When the size of a sprinkler orifice gets bigger the K factor?

SPRINKLER SIZE AND RESPONSE TIME The K-factor increases as the orifice size of the sprinkler increases. The K-factor for a standard 1/2 inch sprinkler is 5.6.

What is the standard K factor?

The K-factor is usually somewhere between 0.3 and 0.5.

How do I know what K factor to use?

K factor is a ratio between the distance from the neutral bend line to the inside bend radius and the material thickness. K factor uses the formula K factor = δ/T. Y factor uses the formula Y factor = K factor * (Π/2).

How do you calculate K factor for flow?

The K-factor is the frequency divided by the flow rate => [1/s] / [g/s] = 1/g. Knowing the K-factor for each calibration point, the factory determines the best fitting K-factor for that particular flowmeter.

How do you convert K factor?

To convert from an Imperial sprinkler K factor to a Metric sprinkler K factor multiply by 14.4 approximately. For standard type sprinkler heads the many design standards specify K-factors and minimum pressure requirements, which can be used for different Hazard classifications and design densities.

What is K factor in fuel flow?

The K-factor is a constant, referring to the number of measurable pulses required for a given volume of fuel to pass through the point where flow is being measured. Sensors measuring these pulses send the signal to an onboard chip that converts the pulses into volume, using the K-factor.

What is K factor in calibration?

The K factor relates the metabolite signal to that obtained from tissue water, i.e., the procedure uses tissue water as an internal calibration standard. The K value is obtained from an experimental calibration measurement in a phantom using a metabolite of known concentration.

What is K factor in turbine flow meter?

The K factor of a turbine flowmeter is determined by the manufacturer by passing a known volume of fluid through the meter and counting the number of pulses generated by the meter. The total number of pulses divided by the volume of fluid passed through the meter gives the K factor.

What is K value for sprinkler?

The k-factor for a fire sprinkler is the discharge coefficient, or in normal human terms just relates to the amount of water that is permitted through the sprinkler. The k-factor is dependent upon the orifice diameter of the sprinkler – a low k-factor (such as K2. 8 sprinkler, for example, is 50% discharge of a K5.