# What is K flow coefficient?

## What is K flow coefficient?

Most of valve industry have standardized the flow coefficient (K). It is defined as the flow rate in US Gallons per minute [gpm] of water at a temperature of 60� fahrenheit with a pressure drop across the valve of 1 psi.

What is a orifice K factor?

Using a K Factor to model performance of an Orifice You can represent an orifice in a Pipe Flow Expert system by using a Fitting with a specific K factor if you know the K factor that represents the flow versus pressure loss performance of your orifice.

### What does K in orifice equation stand for?

specific heat ratio
k = specific heat ratio (constant pressure to constant volume Cp/Cv) P = upstream pressure, psia. ΔP = full-scale orifice pressure-differential, psi. Q = full-scale flow rate at upstream conditions, ft3/min.

What is resistance coefficient k?

Resistance coefficient, abbreviated as K, a dimensionless number, is how much resistance to the flow an obstacle has. This is the opposite of flow coefficient which is how much flow capacity an obstacle allows.

## How do you convert CV to K value?

The relationship between Cv and Kv can be expressed as: Cv = 1.16 Kv (1)

Is flow coefficient constant?

The flow coefficient is a constant, related to the geometry of a test specimen used to calculate the flow rate of a of the test specimen under given conditions.

### 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.

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 is meant by coefficient of discharge CD?

Coefficient of discharge is stated as the ratio between the actual flow discharge and theoretical flow discharge. It is symbolized by Cd and its value is different for each fluid depending on the kind of measurement of flow.

What is coefficient of discharge in fluid mechanics?

In a nozzle or other constriction, the discharge coefficient (also known as coefficient of discharge or efflux coefficient) is the ratio of the actual discharge to the ideal discharge, i.e., the ratio of the mass flow rate at the discharge end of the nozzle to that of an ideal nozzle which expands an identical working …

### What is K in pipe flow?

The K-value, Resistance Coefficient, Velocity Head, Excess Head or Crane method allows the user to characterise the pressure loss through fittings in a a pipe. The K-value represents the multiple of velocity heads that will be lost by fluid passing through the fitting.

What is the equation for an orifice?

An orifice is a submerged opening with a closed perimeter through which water flows. Orifices are analyzed using the following equation: Q = CA 2gh where: Q = Discharge in cfs C = Coefficient of discharge from Handbook of Hydraulics, King and Brater, 5th Edition (or comparable) A = Area of opening in square feet g = 32.2 ft/sec

## How is the discharge coefficient related to the resistance coefficient?

The discharge coefficient may be directly related to the resistance coefficient via the follow equation: For simple pressure loss or flow rate calculations where high accuracy is not critical the following typical values may be used:

What is the K-factor for a fire 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.

### What are orifices and nozzles used for?

Orifices and nozzles are typically used to deliberately reduce pressure, restrict flow or to measure flow rate. This article gives typical values of the discharge coefficient for common orifice and nozzle designs.