Flow measurement – ​​for liquids, steam and gases

Flow measurement or flow measurement is very important in all industrial processes. By knowing how much liquid, steam or gas is flowing where at any given time, it is ensured that downstream processes get the amount they need and it is prevented that too much medium damages pipes or other installations. There are several different ways to measure flow, e.g. electromagnetic, differential pressure, mechanical with a turbine or ultrasound. In addition, we can supply Vortex and oval wheel principles. Vortex is also suitable for flow measurement of gas and steam.

• Electromagnetic meters create a magnetic field inside the pipe using two electrodes on each side. The current created by the medium as it passes through the magnetic field is then measured. The advantages of electromagnetic meters are that they are very accurate, have only two small electrodes (available in different materials) in contact with the medium and do not impede the flow.
• A differential pressure gauge measures the pressure drop across a barrier (orifice) installed in the pipe based on the laws of hydrodynamics regarding proportional pressure drop. The higher the pressure drop, the higher the flow velocity. The disadvantage of this measurement method is the pressure drop it creates, and it is therefore not suitable for systems requiring constant high pressure.
• Turbine meters determine the flow in a mechanical way by the medium passing through and thereby driving a turbine. This type of meter is very accurate. The disadvantage is that a number of parts are exposed to the medium and wear out over time. Maintenance costs are therefore higher than with e.g. electromagnetic meters.
• Ultrasonic flow meters work by mounting a sensor on each side of the pipe, at the correct distance from each other, and both send and receive acoustic signals to each other. The signal that is sent downstream, i.e. in the flow direction of the medium, takes less time than the signal that comes the other way, i.e. countercurrent or against the flow direction. The time difference between the two signals is the subject of the flow calculation. To achieve the best possible accuracy with such a measurement method, it is important to enter the correct pipe dimension, wall thickness of the pipe, type of material in the pipe and type of process fluid. The advantage is that they are mounted above the medium without direct contact, even in open channels, and that they can measure a number of additional parameters such as level and total quantity. To be accurate, an ultrasonic meter depends on the viscosity being predetermined and the medium being homogeneous, i.e. not containing contaminating particles or water bubbles.

There are many applications for flow meters:

Agriculture: Too much water, such as in agricultural irrigation, can flood crops and cause rot. Too little water is just as dangerous. Accurate flow meters ensure that plants receive exactly the amount of water they need.

Wastewater: Accurate measurement of sewage and other types of wastewater is essential to prevent clogging, especially in systems where the wastewater includes both sludge and liquid wastewater.

Drinking water: Drinking water systems require accurate flow measurements to ensure that the correct amount of water reaches all departments and buildings in the system, even if water consumption varies across systems.

Cooling water: Factories and data centers rely on cooling water to prevent equipment from overheating. It is important that the correct amount of water is delivered at all times, which requires accurate flow meters.

Industry: Industrial processes often require a variety of fluids, such as water, steam, and gas. Accurate flow meters ensure that companies have the right volume and pressure of these to keep their factories running.

Oil and Gas: To control production and ensure adequate energy supply in large networks, the oil and gas industry must accurately measure fluid flows, even when the media are not clean or when the fluids are transported over very long distances.

Here is a selection of it J.S.Cock can deliver:

Radar

Flow-Tronic RavenEye is a new type of flow meter for open channels and half-filled pipes. It uses advanced radar technology in combination with traditional level measurement. The meter does not touch the liquid itself and is mounted above the water surface. The sensor is easy to mount via mounting modules, it is hermetically sealed and can withstand flooding. Via the transmitter, a number of parameters such as flow, speed, level and total quantity can be read. The system can also be connected to higher-level PLC systems. RavenEye is a problem solver in applications where traditional flow meters cannot be used or where the dimensions make it advantageous to use this type. The system has no problems measuring in media with a lot of dry matter/particles. RavenEye can also be delivered for installation in EX applications.

Electromagnetic

Andersen-Negele IZMAG to excel in the most demanding sanitary processing environments. From the outside, the compact, stainless steel housing provides the highest level of protection against cleaning chemicals and extreme environmental stresses in the food industry. A standard backlit graphic display not only provides measurement information in the form of numbers and text, but can also display images. Using images together with text provides a more intuitive navigation feel, making programming faster and easier. On the inside, there is a PFA liner that provides increased pressure, temperature and vacuum capacity. This new liner allows the IZMAG to satisfy an expanded list of high-temperature and aseptic applications. In addition to the other features, the flowmeter has a compact overall size that allows it to be installed in tight applications without compromising measurement performance.

Isoil Isomag is a complete range of electromagnetic flowmeters from DN3 to DN2000 and pressures up to 250 bar. They are available in compact or separate versions, wafer (up to DN400) or flanged mounting, with a wide range of electrode and lining material options.

ISOMAG also includes a sanitary design with 3A certificate for food and WRAS approved materials for drinking water applications. Furthermore, ISOMAG flow meters are certified according to MID001 and MID004 and OIML R49-1. ISOMAG can also offer insert variants (mounted through the pipe wall) that can be taken in and out of the process without interrupting it. ISOMAG sensors can be connected to a wide range of converters from simple 2-wire types, to high speed variants for e.g. fast filling applications. Several choices of signal outputs / interfaces such as Modbus, Profibus, Hart, and data logging. A powerful battery powered converter with inputs for pressure signals and GPRS wireless communication can be used with all ISOIL flow sensors. The meters are manufactured and tested according to ISO 9001 and OHSA 18001 and follow international guidelines for flow meter production according to ISO4064 or EN14154.

Turbine

Anderson-Negele turbine flow for measuring flow/quantity in low viscous liquids in the food and pharmaceutical industry. Hygienic design and easy to maintain due to the two-piece housing. Manufactured in 316L and mounted with TriClamp. An economical solution for a number of applications such as process water, clean water, washing chemicals, CIP etc. From German Bopp&Reuther we can also supply turbine flow meters for the chemical and petrochemical industry, for measuring mineral oils, crude oils, acids, alkaline solutions, liquid gases, petrol, diesel etc.

Vortex and Oval Wheel Meters

From German Bopp&Reuther we can supply vortex type flowmeters and oval wheel type flowmeters. These are used for a variety of liquids, as well as gases and steam.