Flow meters are a device designed for measuring non-linear or linear flow rate. They measure the volumetric or mass flow rate of gases or liquids. The accuracy of the metering is advancing along with the technology, generally speaking custody transfer meters are the most accurate. Basic water turbine or paddle units are available for irrigation, potable water and hot water processes pipes.
Variable area flowmeters are like cylindrical clear tubes used in small bore gas or liquid process. Meters can now be supplied with “smart” technology or retrofitted to existing older pulse designs to give drive by wi-fi readings. More advanced technology such as “Mag flows” require a conducting fluid and a nonconducting pipe liner give very accurate results.
Ultrasonic meters use ultrasound to give extremely accurate readings once calibrated to their specific pipe works. Even handier this type of unit can also be portable hence can be used for verification of other metering on sites such as checking turbine meters or processes that may have equipment failure.
Coriolis meters use the Coriolis effect that causes a laterally vibrating tube to distort, and a direct measurement of mass flow can be obtained which is particularly suited to natural gas measurement.
Basic metering ranges from 15nb to 800nb with threaded of flanged connections. Mag flows, Ultrasonic and coriolis meter sizing is variable due to the nature of their operation. A full range of accessories is available to suit each individual type of unit.
Vortex Flow Meters have the ability to measure not just flow but pressure and temperature options. They are popular on steam service however they can be used on gas and liquids.
Untrasonic meters for clean liquids can be portable and inline primarily used on water but other media like fuel etc.
Turbine meters are the traditional metering for clean liguid service such as water. The impeller rotates giving the flow reading on the dial and totalizes the flow over time since its installment. Some of these are now with digital readouts. Reed switches or now more modern pulse capsules can be added along with M Bus, Wireless or Radio feedback options. Remember though over time (usually a couple of years) batteries have to be replaced where feedback options are added. The basic dial readout does not require power to operate.
The WP series is for liquids up to 50 Deg C and there are both screwed BSP and Flanged versions. Threaded units are brass body and flanged have a cast iron body
For hot water service the G series are single jet (sizes DN 15 and DN 20 for indoor use) with multi-jet versions in DN20 to DN50 threaded flanged from DN50 to DN250. The standard unit can operate with temperatures up to 90 Degrees C. Threaded units are brass body while flanged units have a cast iron body.
For temperatures to 120 Deg C there is a heavy duty model in both threaded in flanged. It is more robust, built with internal components to handle the increased temperatures. Data to follow or contact our office for details.
The variable area flowmeter is a thermoplastic unit with clear tubing used in chemical dosing / water treatment plants etc.