Quick Answer: What is K factor in fire sprinkler system?

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.

How do I choose sprinkler K-factor?

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, or pounds of force.

What is K-factor nozzle?

From Wikipedia, the free encyclopedia. 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.

What K-factor is 17 32?

A large orifice (17/32 inch) sprinkler has a “k” factor of 8.0.

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


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.

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What GPM is needed for sprinkler system?

The standard sprinkler flow rates, in general, are from 4 gallons per minute (gpm) from a 5/32-inch nozzle at 30 pounds pressures to over 11 gpm from a 7/32-inch nozzle at 70 pounds pressures.

What is fire sprinkler density?

Sprinkler density is a measurement of the volume of water that is released in a certain amount of time over a specific area. Being able to calculate sprinkler density is important in matters of safety, as a sprinkler system must be able to amply douse an area in order to help control a potential fire.

What is a CMSA sprinkler?

Control mode specific application (CMSA). CMSA sprinklers refer to a specific type of sprinkler listed for storage applications with increased severity fires. … These sprinklers utilize a high initial pressure and quick-response element to discharge high velocity water deep into the seat of a fire.

How do I calculate sprinkler area?

If you wish to calculate sprinkler layout manually, first determine the area of your yard by measuring its length and its width in feet. Then, multiply these numbers together. You may want to draw your yard to scale on a piece of graph paper. Each square should equal 1 square foot of lawn.

What K factor means?

K Factor is a metric for app developers that reveals your app’s virality, by measuring how many additional users each of your existing users brings along to the app. The term K Factor actually comes from the world of medicine, where it’s used as a metric to measure how quickly a virus spreads.

What is the flow rate of a fire sprinkler head?

A typical fire sprinkler design requires 26 gpm, which is fine for 3/4-inch and 1-inch meters, but exceeds the maximum flow for 5/8-inch meters. One solution would be to use low-flow sprinkler heads to lower the system demand at or below 20 gpm.

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What is orifice in sprinkler?

An Orifice Plate is quite simply a thin plate with a hole in it (think of a ring doughnut), used to reduce the pressure or restrict the flow in a pipe system. … The system is designed so that as the fluid converges to pass through the hole the pressure decreases and the velocity increases.

How do I calculate sprinkler flow rate?

Finding the Flow Rate or GPM

  1. Equation: 5 (gallons)/number of seconds to fill, then multiply your answer by 60 to get gpm.
  2. Example: It takes you 30 seconds to fill a five-gallon bucket; 5/40 = 0.167, 0.167 x 60 = 10 gpm.

How do you calculate gpm for a fire sprinkler system?

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.