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  • Control valve actuators: Their impact on control and variability
    Electric control valve actuators provide excellent performance and are ideal for oil and gas wells in remote production fields...
  • 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
  • Valve Actuators and Positioners Go Digital
    "Digital Fieldbus Technologies Catch Up to Valve Actuators and Positioners". Fieldbus is the name of a family of industrial computer network protocols used for real-time distributed control, standardized as IEC 61158. Advanced digital fieldbus technology has been successfully used in oil and gas
  • Eight Critical Factors in Purchasing Offshore Pilot Valves
    Stainless steel pilot valves play small but critical roles in the control of offshore platforms and other demanding oil and gas production operations. Acting as pilots for process and larger emergency shutdown (ESD) valves, these valves are typically installed in a platform's pneumatic logic
  • Hydraulic Speed Control
    . However, the significant difference between the two is that HSCs are not intended to absorb the impact velocity of a moving object, but rather control the speed. As the piston rod travels through the stroke of the HSC, oil is precisely metered through a series orifice. This ensures constant speed
  • Mechatronic Valve Body EOL Function Test (.pdf)
    , oil conditioning) and to teach in the control characteristics. ATW was one of the first suppliers that could offer a hydraulic test rig with the functionality, precision and the level of automation that is necessary for a 100% test at end of line. In the meantime a lot of ATW rigs in the field
  • Flow Switches for Oil/Gas Refinery Water Treatment
    , etc., that can be used in refinery wastewater treatment. They all, however, have one thing in common: liquid flow switches are necessary to monitor and control the flow of water and chemical additives throughout the wastewater treatment system. Flow switches are used at multiple points in water
  • Case History: PGI International - Manufacturer of Precision Products Used in Flow Control Applications
    Using a diode-pumped Nd:YAG laser system for marking various wellhead and valve components cut the processing time to 26 seconds, including part loading and unloading. PGI International (Houston, TX) is a manufacturer and supplier of wellhead and valve components for production equipment serving

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