What is the K factor in fire sprinkler?
In fire protection engineering, the K-factor formula is used to calculate the discharge rate from a nozzle. Spray Nozzles can be fire sprinklers or water mist nozzles, hose reel nozzles, water monitors and deluge fire system nozzles. K-Factors have also been calculated and published in US units of PSI and GPM.
What is the K factor formula?
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.
How do you calculate fire sprinkler flow rate?
If, for instance, you have a fire sprinkler with a discharge coefficient of 6.2: 3.87 x 6.2 = 24 gallons per minute. Multiply this individual flow rate by the total number of sprinklers. If your system has, for instance, 15 sprinklers: 24 x 15 = 360 gallons per minute.
What is the K factor of water?
The “K-Factor” of a water meter is the manufacturer’s way of describing liquid flow through their meter. A K-factor of “100” means that there are 100 “pulses” produced for each gallon of water.
How do you calculate K-factor 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. Calibration points are determined by averaging all K-factors.
What is the standard K-factor?
The K-factor is usually somewhere between 0.3 and 0.5.
How do you calculate k-factor flow?
What is pressure k-factor?
K-factor helps to calculate the discharge rate from fire sprinkler heads. It’s calculated in imperial units for the United States by using the flow in gallons per minute (gpm) and the pressure in PSI. Metric calculations use the flow in liters per minute and pressure in bar.
How do you calculate sprinkler density?
The density of water application would be measured thus:
- Volume / Area x Time or Litre / m3 x min.
- dm x dm x dm / 10dm x 10dm x min.
- dm / 100min = 100mm / 100min = 1mm / 1min = mm/min.
- The density of application can, therefore, be measured in millimetres per minute (mm/min).
- Area x Density = Quantity.
What is the K-factor unit?
How do you find k value in statistics?
Consider choosing a systematic sample of 20 members from a population list numbered from 1 to 836. To find k, divide 836 by 20 to get 41.8. Rounding gives k = 42.
How do you calculate airflow K-factor?
Alternatively, it may be the airflow K-Factor, which is the velocity factor times the inlet area. For an 8 inch Krueger unit, therefore, this would be 2625 * 0.349, or 916. A separate factor is required for each size. All Krueger VAV terminals have round inlets.
What is RTI for sprinkler?
The RTI represents the thermal characteristics of the sprinkler and the value is assumed to be. constant for a sprinkler regardless of exposure conditions. ISO 6182 [3] classes sprinklers as. ‘fast’ response for RTI values 0 – 50 (m.s)½ and ‘standard’ response for RTI values. 80 – 350 (m.
What is K value in stats?
› k is the constant dependent on the hypothesized distribution of the sample mean, the sample size and the amount of confidence desired. › n is the number of observations in the sample. › Note that (standard deviation / √n) is the standard error of the mean and is. a measure of how good our estimate of the mean is.
What is K-factor in flow measurement?
For aircraft fuel flow meters, K-factor refers to the number of pulses expected for every one volumetric unit of fluid passing through a given flow meter, and is usually encountered when dealing with pulse signals.
What does SSP mean on a sprinkler head?
Marked “SSP” (Standard Sprinkler Pendent) or “PENDENT” on the deflector. CONVENTIONAL SPRINKLER: An “old style” sprinkler intended to be installed with the deflector in either the upright or pendent position.
What is a k factor in sprinkler system?
K-Factor. They are dimensionless numbers used to calculate the flow and pressure of water discharged from sprinkler heads, according to Hydronics Engineering. K-factors can be determined by using the following equation: K = Q/P1/2, where K is represented by gallons per minute, or gpm/psi1/2, Q is flow rate in gpm and P is pressure in psi,…
How do you calculate pressure loss from K in sprinklers?
Alternatively, for a given flow rate through the sprinkler, the pressure loss can be calculated from the K value. Note: Imperial & Metric sprinkler K factors are different. To convert from an Imperial sprinkler K factor to a Metric sprinkler K factor multiply by 14.4 approximately.
What is the k value of sprinkler discharge?
Typical sprinkler Discharge Coefficients might be: K=5.6 (where the units are in US gpm/psi 0.5) This equates to a metric K of 80.6 (units are in (l/min)/bar 0.5)
How do you find the flow rate of a sprinkler?
For a given pressure drop across the sprinkler component, the flow rate is determined using a sprinkler K value of 5.6. The following are pressure drop / flow rate data points for such a sprinkler: 1.0 psi drop gives √ (1.0) x 5.6 = 5.6 US gpm flow 4.0 psi drop gives √ (4.0) x 5.6 = 11.2 US gpm flow