Wednesday, June 28, 2023
The use of Coriolis Technology for Flow Instruments are increasing in popularity due to the flexible nature of these Instruments.
Mass Flow Controllers are used to control the flow rate of a liquid or a gas. However traditionally that device is not flexible that you can switch between a gas and a liquid on the same device. Coriolis technology has led to a universal mass flow instrument, where either a gas or a liquid can be used on the same device.
The Fluid doesn’t need to be known for the Coriolis technology to work, simply fill the pipe with the required fluid (liquid or gas) at the normal operating pressure, then ensure there is a no flow situation ideally with shut off valves and tare the device.
This is now a calibrated condition to measure the fluid. The tare is a simple push of a tare button on the device itself or via the free software, of course you can wire this yourself and perform the same tare. The tare takes a matter of seconds to perform. Instructions are clear with the operation manual - which can be found on this page.
Thus, the uses of Coriolis technology with flow instruments are enormous, a device that can cover the most demanding needs for the process engineer.
Alicat Coriolis Mass Flow Meter (MFM) with SAE threaded connections.
Alicat Coriolis Mass Flow Controller (MFV) with control valve and VCR Connections.
Depending on what you want to achieve Premier Control Technologies can support you through the selection process. We can calculate the accuracy and pressure drop calculations based on your process conditions. These are available via a graphic chart illustration for the model selected.
The Process details must be supplied for accurate selection of the most suitable model.
Knowing the process details is crucial for our engineers to size the Coriolis instrument: Start with the phase of the fluid, is it a liquid or a gas?
What is the fluid this is the specific name such as gas: Hydrogen or liquid: Water.
It is not needed for the measurement principle.
Caveats are if the fluid is unknown or a secrete formulae. Here it is acceptable to provide the viscosity and density of the fluid and we can therefore calculate the model needed.
Note: Customer input would be needed for the materials of construction selection as the user will know what is the best materials for construction for their secret fluid.
Aggressive Fluids: The Alicat Coda has a default construction of stainless steel when the fluid is aggressive a high Nickel alloy may be selected.
Similarly Seals are selected based on the fluid being used. Seals are made from elastomeric materials FKM, FFKM, EPDM or metals seals are also available in stainless steel or Nickel alloy.
Taking some details such as water with a maximum required flow rate of 1 LPM (Litre Per Minute) and an inlet pressure of 30 Bar (Gauge) and an outlet pressure of atmospheric we can see some details on the below graph.
The left-hand side graph shows the pressure required for a meter or a controller for flowing 1 LPM maximum of water. The pressure drop would be 2 barG for a meter and 2.25 BarG for a controller at full flow (1 LPM).
The right-hand side graph shows the accuracy. The accuracy at the full scale (Full flow of 1 LPM) is 0.2%, this continues at this high accuracy all the way to around 0.1 LPM.
Every process requires a sizing calculation which PCT may perform for you and share the data as per the above with you.
There are options available for the optimum Instrument specification. These include:
Premier Control Technologies a leader in Flow and Pressure Instrumentation are the UK Distributor for Alicat Scientific.
Alicat Scientific Inc is a USA company (Arizona) Global HQ, European HQ (Netherlands) which specialises in scientific instrumentation based on low flow and Pressure.
Alicat Scientific Inc is part of UK’s Halma Group a FTSE 100 Company owning many Scientific Companies around the Globe.
PCT are a leading UK distributor and your enquiry will be handled with the utmost professionalism. Please provide your details below.