valve operator Articles

  • Basic operation of a Cycle Stop Valve

    Automatic pump control methods are described as a pump system that automatically delivers water when a tap is opened, and automatically stops the pump after all taps are closed. A variety of pump control methods have been used in the past. The Cycle Stop Valve replaces: Variable Frequency Drives (VFD’s) or “Constant Pressure Pumps”. Large pressure ...


    By Cycle Stop Valves, Inc.

  • Remote operated shut-off valves: Developments in electrically operated solutions

    Led by COMAH (Competent Authority/Industry Standards Task Group), safeguards are being put in place by the petroleum industry to give additional safety and environmental protection to tank storage installations. A key feature of these safeguards is the installation of Remote Operated Shut-off Valves (ROSoV) with failsafe actuation as recommended by the Buncefield Standards Task ...


    By Rotork plc

  • Rotary valve maintenance: preventing operating problems

    Preventing operating problems by maintaining your rotary airlock valve Even though a rotary airlock valve is a relatively simple device, you have to maintain it properly to ensure it performs dependably. Proper maintenance will provide twin long-term dividends: better valve performance and smooth conveying system operation. First, know your valve inside and out. Maintenance ...


    By Wm. W. Meyer & Sons, Inc.

  • Preventing operating problems by maintaining your rotary airlock valve

    Even though a rotary airlock valve is a relatively simple device, you have to maintain it properly to ensure it performs dependably. Proper maintenance will provide twin long-term dividends: better valve performance and smooth conveying system operation. First, know your valve inside and out. Maintenance workers should read the manufacturer's operating manual. This will help them understand the ...


    By Wm. W. Meyer & Sons, Inc.

  • Electro-hydraulic actuation delivers the solution for remote operated shut-off valves

    An extensive review of safety measures recommended by the MB Lal Committee in India, following an accidental fire at the IOCL Jaipur Terminal, has resulted in the introduction of electro-hydraulic failsafe actuators for critical tank farm Emergency Shutdown (ESD) applications. These valves, known as ROSOV (Remote Operated Shut-off Valves), now provide tank overfill protection at the majority of ...


    By Rotork plc

  • Tank terminal demonstrates the electrically operated solution for ESD Valves - case study

    Overview Since the disastrous fire at the Buncefield fuel depot in 2005, much has been done to ensure that such a catastrophic accident should not happen again. Led by COMAH (Competent Authority/Industry Standards Task Group), safeguards have been put in place by the petroleum industry to provide additional safety and environmental protection to tank storage installations. Endorsing the ...


    By Rotork plc

  • Tideflex Valves vs Flap Valves

    MeasurIT are increasingly called upon by end users to provide Tideflex valves to replace faulty flap valves (see case studies here and  ...


    By MeasurIT Technologies Ltd.

  • Rotork in Germany strengthens worldwide manufacturing and operations

    Since it was first founded in England in 1957, Rotork has flourished to become an established leader in actuation technology with a global network of manufacturing plants and sales offices. That growth has come both organically as well as through the acquisition of companies with complementary products and markets. In Germany, for example, the successful integration of the former company PC ...


    By Rotork plc

  • Taking the Mystery out of Cavitation White Paper. Pilot-Operated Automatic Control Valves

    Cavitation can be an extremely damaging force as related to the application of pilot-operated automatic control valves. The consequences of cavitation are numerous and can include: loud noise, extreme vibrations, choked flow, destruction or erosion of control valves and their components resulting in disruption of water distribution or plant shutdown. This article deal with cavitation solutions as ...


    By Singer Valve Inc.

  • Transient stability improvement of power system using fuzzy operated steam diversion valve

    This paper proposes a fuzzy based steam diversion valve to divert the steam to a storage tank during the occurance of a fault in a power system in order to improve stability of the system. The advantages of this technique over fast valving are discussed. The rate of opening and closing of valve are decided by the fuzzy controller. The valve operation is coordinated with fuzzy based braker. The ...


    By Inderscience Publishers

  • 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

  • Valuing Global Valves

    Control valve solves flow control & pressure challenges Donnacona, Quebec, Canada, is an industrial town just west of Quebec City. The town’s water treatment plant was built in 1969 and has since undergone three major retrofits: new high-pressure pumps and an electrical upgrade in 1995; a filter bottoms change in 2000; and a river water intake upgrade in 2005. The plant includes ...


    By Singer Valve Inc.

  • Healthy Control Valves

    A simple maintenance routine can help ensure trouble-free valve operation. Whether the control valve in your system is the first one that has required maintenance or if you are experienced with maintaining multiple valves in your system, some simple guidelines can help keep them operating at optimal performance. Physically checking all valves at least every 12 weeks is important, assuming that ...


    By Singer Valve Inc.

  • 10 years operation experience of thermal hydrolysis projects

    Cambi Milestones 1990 - First development work following research work of Li and Noike 1995 – HIAS Norway – first full scale plant – still working very well after 10 years 1998 - 2002 rapid increase in projects, Naestved, Chertsey, Lillehammer, Borregaard, Fredrecia, Aberdeen, Niigate, Dublin – new challenges and risks to be overcome 2000 - 2005 some problem ...


    By Cambi Group AS

  • EasiDrive Provides Safe, Economical Valve Operation, Ideal for Use in Oil & Gas Processing Industries

      The EasiDrive portable valve actuator securely and effectively operates valves in oil refineries, power plants, paper mills and chemical processing facilities, even where adverse climates, such as arid and dry-desert environments, make operations more challenging.  The combination of intense heat and a dry climate can make ...

  • Numbers Speak Volumes: Water Distribution Assessment Increases System Operability To 84 Percent

    This large Midwest utility maintains and operates water collection, treatment, and distribution systems, as well as wastewater collection and treatment systems and stormwater management systems for its residential, business and wholesale customers in the region. To ensure the accessibility and quality of water services to meet the growing needs of the ...

  • Safety Valve / Change-Over Valve Combination ( Refrigerant Applications)

    The Seetru range of Safety Valves for refrigeration applications are designed to meet the needs of the refrigeration industry, offering safety valve technology for compressor manufacturers, industrial refrigeration, commercial refrigeration, ice making systems and air conditioning.  Used if a plant shutdown is impossible or undesirable, change-over ...


    By Seetru Limited

  • How to Optimize Oxidation Systems for Efficient Operation

    Emphasis on air management within converting-process dryers and ovens is critical to the design of pollution-control systems for treating exhausts containing VOCs (volatile organic compounds). Efficient air management allows the pollution-control system to be optimally sized to meet the needs of the process. Good process control further defines the emission stream by avoiding the need for large ...


    By Dürr Megtec LLC

  • What You Need to Know about Electronic Automation of Hydraulically-operated, Diaphragm-actuated Control Valves

    Hydraulically controlled, diaphragm-actuated control valves are the mainstay of the waterworks industry to control pressure, flow, level, pump control, and at times to meter. These automatic control valves are controlled by pilots to do specific tasks and are mainly single-set-point systems. With the need to remotely actuate and control the valves and the applications becoming more complex, ...


    By IWA Publishing

  • Hydronic Balancing Valve

    Hydraulic balance valve, also known as self-operated balance valve, flow control valve, flow controller, dynamic balance valve, flow balance valve, is an intuitive and simple flow adjustment control device. The application of the hydraulic balancing valve in the pipe network allows the flow to be set directly according to the design. The valve automatically eliminates the flow deviation caused by ...


    By ZhengFeng Valve Group

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