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Conduct Research Top

  • Bellows smooth valve moves
    Off-the-shelf electrodeposited-nickel bellows replace costly and stroke-limited custom bellows in gas-turbine fuel-control valves. In-line, microprocessor-controlled valves from Continental Controls Corp. work with PLCs to match fuel flow to turbine rpm and load. Valves use two oil-filled
  • Establishing a new method for determining valve flow coefficient
    The most frequently heard question in the engineering departments of valve manufacturers is, "How much will it flow? " Although details such as process gas, inlet pressure, inlet temperature, and pressure drop are often not included in the question, an acceptable flow rate and/or pressure drop
  • Hydraulic Speed Control
    When using industrial equipment such as automated drill heads, positioning slides, and transfer conveyors, precise speed and feed control are required more often than not. While there are a number of options for precise control, probably the most cost effective is the Hydraulic Speed Control. HSCs
  • Flow Control Characteristic CV Value
    The CV value of a needle valve changes as shown in the GRAPH2 when the valve opening changes. Setting aside the control characteristics, the problem is the flow rate, not selection of an actual valve. When the maximum CV value is substituted in the aforementioned equation to find Q, the maximum
  • Measurement and Control Basics, Fourth Edition
    valuable as a concise and easy-to-read reference source on the subject. This new edition provides expanded coverage of pressure, level, flow,. temperature, analytical measurement, and process control computers. Material on the proper tuning of control loops was added to Chapter 1,. and expanded coverage
    All phase change refrigerant systems require an expansion device which controls the flow of refrigerant in the evaporator. Two principal types of control are used: Thermal Expansion Valves or Capillary Tubes. Thermal Expansion Valves balance and modulate the refrigerant flow to the heat load
  • Selection Considerations for Control Valves Versus Regulators
    . A control valve is the final control element in a control system and needs to be evaluated in that context. A control valve is most frequently used in the control of the following parameters: * Temperature * Pressure * Flow * Level However, in principle, any continuously varying system parameter
  • Optimux Control Valves for Aerospace Testing Systems
    of flow, temperature, and pressure control solutions for aerospace applications that include the OpTE - a robust triple offset butterfly valve that ensures bubble-tight shutoff at any temperature - and the OpGL-XT - a rugged, multi-purpose, custom-engineered globe control valve for applications
  • Heat Control Using a Brainchild Chart Recorder and an Analog Output Card
    CAS DataLoggers recently provided the postsale technical solution for a seafood distributor who ordered a Brainchild VR-06 Paperless Chart Recorder to both record and control the temperature in a large oven. The oven was heated by hot water, and the control came from an iris valve.
  • Endurance Test, Model MTV
    The charts below demonstrate the effectiveness of Ventiduct for heat control by thermal radiation. The Ventiduct reduces the temperature rise in the valve by approximately 12°C. Test Conditions: Fluid - water; Valve Type - MTV-2; Full Rated Voltage Applied (24Vdc)
  • Valves & Specialty Metal Materials (.pdf)
    The role of valves in a process is far from insignificant. These components enable engineers to control the vitals of a process: temperature, pressure, concentration, and flow. In some cases, the failure of a valve could be catastrophic and in other cases just a headache, but whatever your
  • Decentralized hydraulics boost sawmill output
    knowledge of hydraulics. The pretested subassembly consists of a temperature and vibration-resistant microcontroller built into a fast-acting control valve, along with a position transducer and hydraulic cylinder. It communicates to higher-level PLCs, motion controllers, or CNCs via fieldbuses
  • Measuring out fluids microdrop by microdrop
    , a 3/2-way valve, can be integrated with a compensated flow sensor to deliver nanoliter quantities of fluid with +-1% accuracy and 20 msec response times. The compensated sensor measures flow rates up to 5.5 l/sec with an accuracy better than 2% of the flow rate over a 20 to 50 C temperature range
  • Traditional solenoid valves are simple to install but may not be the right solution for long term reliability or high flow applications
    Replacing a solenoid valve with a DynaMatic electric ball valve...Why and how?. Solenoid valves are typically easy to install and are used in applications utilizing pressure, flow, temperature and level switches. They can also be controlled by PLC units that only output a single control signal
  • MICRO:Top 40 - Page 2 (Nov '00)
    materials as needed. The valve opens rapidly, providing high sensitivity to changing pressure. A stainless-steel control spring does not contact the liquid. Relief or back pressure is adjustable between 5 and 100 psi, and maximum flow is 200 gal/min. Designed for wafer cleaning and thinning applications
  • MICRO: Critical Materials?Chemicals
    condition in a 20-wafer-per-hour process can cause an IC manufacturer processing wafers valued at $2500 each to lose $1,200,000 per day in revenues. Abnormal flow conditions can have a variety of causes, including pump, filter, and valve or valve control issues; facilities difficulties; or human