How do you calculate the flow rate of an orifice plate?

Posted on by Dominique Stacey

How do you calculate the flow rate of an orifice plate?

Equations for orifice plate flow rate calculation

  1. Maximum flow: Max flow = K x √ΔPmax.
  2. Constant: K = max flow/√ΔPmax.
  3. Differential pressure: ΔP = (flow/K)²
  4. Output (4-20 mA): Output mA = [(%ΔP) x 16 mA] + 4 mA.

What is flow rate through an orifice?

The calculated flow rate through orifice meters is a function of temperature (T), pressure (P), oil specific gravity (SG), square root of differential pressure (ΔP^0.5) and viscosity (μ) as defined in Eqt.

How do you calculate steam flow through an orifice?

Steam flow through orifices – for steam pressures ranging 2 – 300 psi

  1. 1 lb/hr = 1.26×10-4 kg/s.
  2. 1 psi (lb/in2) = 6,894.8 Pa (N/m2) = 6.895×10-3 N/mm2 = 6.895×10-2 bar.
  3. convert inch to mm.

How do you calculate steam flow rate?

The feedwater flow rate can be calculated from steam mass flow and blowdown rate:

  1. Blowdown Mass Flow = Feedwater Mass Flow * Blowdown Rate.
  2. Steam Mass Flow = Feedwater Mass Flow – Blowdown Mass Flow.
  3. Steam Mass Flow = Feedwater Mass Flow – Feedwater Mass Flow * Blowdown Rate.

How is flow orifice size calculated?

Divide the flow of the liquid by the velocity of the liquid to determine the area of the orifice in square feet. In the above example, you would divide 8 by 2. The total area of the orifice would be 4 square feet.

What is a good steam flow rate?

As a general rule, a velocity of 25 to 40 m/s is used when saturated steam is the medium. 40 m/s should be considered a practical limit, as above this, noise and erosion will take place particularly if the steam is wet. Some National standards quote velocities up to 76 m/s for saturated steam.

How do you measure amount of steam?

Measurement of Steam Consumption

  1. By a steam flowmeter. The use of a steam flowmeter may be used to directly measure the steam usage of an operational item of plant.
  2. By a condensate pump.
  3. By collecting the condensate.

Does an orifice reduce flow?

Orifice plates are also used to reduce pressure or restrict flow, in which case they are often called restriction plates.

How do you calculate velocity and flow rate?

Flow rate and velocity are related by Q=A¯v where A is the cross-sectional area of the flow and v is its average velocity.

How many watts does a steam cleaner use?

Energy Usage Typical steam cleaners can use anywhere from 1000 to 1800 watts.