# Pressure drop calculators

## Calculator's features:

- Calculate pressure drop for known flow rate
- Calculate flow rate for known pressure drop
- Darcy formula for friction coefficient calculation
- Colebrook-White formula for turbulent flow calculation
- Flow in valves and fittings
- Laminar and turbulent flow
- Flow velocity/diameter calculation

## Pressure drop calculator

### for incompressible fluids

- Applicable for liquids and low pressure drop gas flow.
- Circular and rectangular closed pipe and duct,
- Incompressible flow ρ=const.,
- Colebrook-White equation based

# Calculators for pressure differential devices

## Calculator's features:

- Calculate flow rate in pipe based on the created pressure drop,
- For liquids and perfect gases,
- Flow velocity calculation,
- Convert between volume and mass flow rate,
- Reynolds number calculation,
- Discharge coefficient calculation.

## Orifice plate calculator

### Calculate orifice diameters

- Quickly calculate the actual flow rate through the orifice
- Flow rate calculation from the measured pressure drop caused by the orifice plate inserted in the pipeline

## Venturi tube

### Venturi effect calculation

- Quickly calculate the actual flow rate through the Venturi tube
- Flow rate calculation from the measured pressure difference caused by the flow contraction

## Nozzle and Venturi nozzle

### Nozzle calculation

- Calculate flow rate using the static pressure difference between inlet pressure and pressure in the nozzle throat
- The calculation is according to ISO 5167-3

## Prandtl probe - Pitot tube

### Calculate velocity

- Calculate flow velocity by measuring a difference between stagnation pressure and static pressure in a single point of a flow streamline
- Applicable for airflow in rectangular and round ducts

# Easy calculators for quick calculations

## Pipe diameter calculator

### Calculate flow velocity

- Quick pipe diameter calculation in closed, round, rectangular pipes and ducts
- Enter flow rate and velocity in text fields in the calculator and click calculate button to get results

## Reynolds number

### Laminar or turbulent flow

- Analyze what makes fluid flow regime laminar and what is needed to force the fluid to flow in the turbulent regime
- Calculator for all fluids and flow rates without any restriction

## Thermal energy

### Calculate heat energy, thermal power and flow rate

- Calculator for heat power calculation, and the flow rate calculation
- Suitable for hot water boilers, water and air heat exchangers, chillers, heaters, and other equipment

## LPG flow

### Calculate heat power and flow rate of LPG

- Calculate flow rate, pipe diameter and heat power of liquefied petroleum gas – LPG
- Determine flow rate of an LPG in a gas furnace, for burner heat power

## Control valve sizing calculator

### Calculate flow coefficient

- Calculate maximum flow rate through valve for pressure drop and flow coefficient Cv
- Compare control valves from different manufacturers

## Gas control valve sizing calculator

### Calculate flow coefficient

- Calculate valve capacity for given upstream and downstream pressure and known Cg or Kg
- The calculator is in line with the standard EN334