flow switch Articles

  • Webinar Highlights: Microfluidics for macromolecules

    Hi, I’m Jim Murphy, Principal Consulting Chemist at Waters, and I recently collaborated with Lucinda (Cohen) Hittle to present an exciting webinar on the use of microflow chromatography for macromolecules.  Lucinda, a Director of Discovery Bioanalytics at Merck, presented an overview of the use of LC-MS for peptide analysis along with various case studies for in vitro and in vivo ...


    By Waters Corporation

  • 100 Simple Ways To Save Water

    To improve water conservation install a rain sensor, it turns off your irrigation when it rains. Use a weather-based controller. The use of smart controllers can reduce water usage 24% a year on average. Learn about available rebate programs ...


    By Jain Irrigation, Inc

  • Ukraine spotlights German priority: energy switch

    The crisis in Ukraine has added an extra dose of uncertainty to German Chancellor Angela Merkel's biggest domestic project: shifting the country from nuclear to renewable energy sources. Merkel launched the drive to transition the country away from nuclear after Japan's 2011 Fukushima disaster. Since then, the "Energiewende" - roughly, "energy turnaround" - has created increasing headaches. Now, ...


    By Associated Press

  • Shannon Creek Dam Switches to Custom Anti-Cav Control Valve Solution

    Shannon Creek Dam and pump station is the core feature of the Regional Water Supply scheme, a joint venture of the Coffs Harbour City Council and the Clarence Valley Council. With an inundation area is 37 square Km, the reservoir provides 30,000 mega litres of supplementary water supply to The Clarence Valley and Coffs Harbour, located on the Mid North Coast of NSW, Australia. This award-winning ...


    By Singer Valve Inc.

  • Design low losses 6/8 switched reluctance motor

    The magnetic circuit of the conventional 6/8 switched reluctance motor (SRM) is re-designed to minimise the losses. The flux loops are shortened by making each two stator teeth incorporated in one magnetic circuit only. Subsequently, the flux does not flow in all parts of the stator yoke. The unused iron sections do not produce iron losses. Now, the stator consists of three separated sections ...


    By Inderscience Publishers

  • Here Are More Reasons To Switch To New Car Steam Cleaner Machines

    Car cleaning is one of those tasks every car owner has to perform on a regular basis to keep the car clean and shiny. Cleaning the car exteriors generally involves using a multitude of equipment, such as buckets, towels, sponges, water from a garden hose, commercial cleaning chemicals, and many more. However, the combined action of all these equipment may sometimes fail to produce the kind of ...


    By Daimer Industries Inc.

  • DFM 5.0 doppler flow meter for frac sand slurry flow monitoring

    CanFrac Sands Ltd. of Lloydmister Saskatchewan (Canada) needed a flowmeter that could accurately measure sand slurry flow without being damaged by this highly abrasive product. They selected the Greyline DFM 5.0 Doppler Flow Meter with a clamp-on ultrasonic sensor mounted on the outside of a pipe. CanFrac produce “fracturing sand” used by the oil and gas industry. This special type of ...


    By Greyline Instruments Inc.

  • Food Waste Collection Companies Grow With The Flow

    On October 1, the Commonwealth of Massachusetts’ ban on landfill disposal of commercial organics from establishments generating one ton or more of food waste per week goes into effect. On the front lines of helping these businesses and institutions comply are organics haulers, many of whom have been offering their services for years. “Seven years ago, we were servicing about two dozen ...


    By BioCycle Magazine

  • Keeping Everything Flowing - How process technology from ProMinent secures optimal flow for industry

    Do you know about the flow? That warm and fuzzy feeling when everything is running perfectly? Transferred to the field of process technology, this ideal condition has been reached when all components within a processing plant interact perfectly with one another, when processes are executed efficiently, safely and economically and the system is capable of delivering its maximum productivity. To ...

  • A large-scale hydroclimatological perspective on western European river flow regimes

    A novel flow regime classification scheme was applied to 141 river basins across western Europe, providing more robust analysis of space–time variability in regimes and their driving hydroclimatological processes. Regime shape (timing) and magnitude (size) were classified to regionalise long-term average flow regimes and to quantify year-to-year variation in regimes for each basin. Six ...


    By IWA Publishing

  • New topology for management of bi-directional power flow between vehicle and grid with reduced ripple current at unity power factor

    In this paper, a new topology of single-phase pulse width modulated (PWM) AC-DC converter is proposed for bidirectional power flow between plug-in hybrid electric vehicle (PHEV) and the grid. This converter consists of a PWM voltage source converter (VSC) and a ripple reduction circuit. The ripple reduction circuit consists of a switching leg and an inductor. The inductor is connected between ...


    By Inderscience Publishers

  • Non-contacting solution for Plugged off flow meters in the oil patch - Case Study

    For years Petrobakken Energy Ltd. used inline turbine flow meters to track the flow rate of oil recycled to treaters. But with a high concentration of wax and sand in the oil, the turbine meters were quickly plugging off. The line had to be shut down at least once a day and the turbine flowmeters disassembled for cleaning. This was troublesome and expensive. Petrobakken knew there had to be a ...


    By Greyline Instruments Inc.

  • Projected leaf area and flow rate - options and observed effects on gas exchange measurements with CIRAS-2

    From a practical and theoretical standpoint, the objective in using gas exchange technology is to capture representative plant/soil physiological data, holding instrument error to a minimum. A basic goal in this is to ensure that sampling reflects real responses to natural or imposed environmental variability (treatments). Whether from an observational or experimental approach, the physiological ...


    By PP Systems

  • Replacement Fill Control Valves with Electronic Flow and Metering Improve Pressure, Stop Leakage and Prevent Valve Failures

    The City of Modesto, California is situated 90 miles east of San Francisco and has approximately 200,000 residents relying on 200,000 of gallons of water a day. The City needed to upgrade three water storage tanks that hold approximately 750,000 gallons each. After years of using motor operated valves to fill water storage tanks, the city recognized that there were just too many problems. ...


    By Singer Valve Inc.

  • Modelling of three-phase grid-connected inverters

    Grid-connected inverters are key elements that interface the distributed energy sources with the grid. In this paper, a graphic modelling method based on switching flow graph is presented for modelling inverters, with a one-cycle controlled inverter as an example. This method features great simplicity and accuracy, and is compatible with dynamic system-simulation software, such as MATLAB. PSPICE ...


    By Inderscience Publishers

  • Power quality improvement in HVDC systems using 18-pulse voltage source converter

    This paper deals with the modelling, control and design of 18-pulse voltage source converters (VSCs) for high voltage DC (HVDC) transmission system with power quality improvement. A two-level VSC is used to realise an 18-pulse VSC operation with minimum switching loss. The performance of the VSC system is improved in terms of reduced harmonics level at fundamental frequency switching (FFS). The ...


    By Inderscience Publishers

  • Pump Protection - unattended operation in sludge pumping

    Pulsar's 500 series non-invasive flow switches are used to great effect in this application, protecting sludge pumps and allowing unattended operation. Pulsar’s Pulsarguard 500 units are used by Whale Tankers to ensure that their specialist positive displacement pumps never run dry. By employing the Pulsarguard unit, staff are able to allow the pumps to operate unattended, confident that there ...

  • Experimental exploration of functional integrity, functional reliability and reliability of modern power electronics equipments

    Energy flow from source to load via electrical domain involves dual conversion and makes loads inefficient. The status has changed once energy is channelled through power electronic equipments. Their function spaces are beyond just achieving functionality as more loads are under active control and grid is enabled to deliver its potential. Multiple topologies exist to achieve mere functionality. ...


    By Inderscience Publishers

  • An artificial intelligence approach for optimizing pumping in sewer systems

    This paper presents details of a fuzzy logic system developed for the control of sewer pumping stations for energy costs savings. This is part of an ongoing collaborative project between Anglian Water and the University of Sheffield. The model rules and operation are developed for one representative pumping station in order to enable the identification of potential benefits and inhibitors to ...


    By IWA Publishing

  • Multi-objective optimisation of the operation of a water distribution network

    The aim of the present paper was to move water through a reservoir network in such a way as to meet consumer demands and level constraints, minimise the cost of electricity, and minimise the loss of chlorine. This was to be achieved by choosing the switching intervals of reservoir inlet pumps and valves, at the same time complying with the allowed minimum interval size of each device. Switching ...


    By IWA Publishing

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