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Actuators & Controls

Smaller Electric Actuators Fulfill Expanded Needs

14 spr actuators 1The conventional perception of a motorized valve is one of a large ­isolating valve with a heavy-duty valve actuator, usually powered by a three-phase electrical supply. However, many processes require smaller valves, and those valves often call for small electric actuators for isolating and modulating applications. As a result, the number of these smaller actuators is steadily growing.

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Fire Protection Solutions

14 wnt fire introBecause of the potential harm and damage to people and property, fires and explosions are a major concern in refinery, gas processing, petrochemical and offshore, and many other types of facilities. Minimizing the danger requires efficiently protecting the systems that control the potentially hazardous areas of those facilities. In many of them, valve operators, gear boxes and associated components are a top priority for safeguarding. This is because proper fireproofing of these components can mean this critical equipment can be controlled during an emergency, thereby preventing catastrophe.

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Market Drives Actuation in Natural Gas Pipelines

13 fall pipeline 1More than 200 pipeline systems in the United States alone transmit natural gas through more than 300,000 miles of intrastate and interstate pipelines. What’s more, 1,400 compressor stations operate in the U.S. to transfer the gas through the transmission pipelines to ultimate distribution points1. As the industry continues to grow, pipeline operators seek alternatives to traditional equipment to ensure pipeline safety and reliability. That includes new types of actuators.

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Sizing Actuators: It’s All about Communication

vmfall12 actuatorsThe key to successful sizing or selection of the right valve actuator for a job is communication. That communication occurs between the specifier of the automated valve, the valve supplier and the actuator supplier. The selection process itself is straightforward—actuator manufacturers publish selection or technical data charts. The task of the person who is sizing or selecting consists of comparing the project’s valve actuation requirements against the actuator manufacturer’s published data.

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Pneumatic Valve Actuators in Sub-Arctic Climates

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Sub-arctic climates experience temperatures from 100° F (38° C) in the summer to –60° F (–51° C) in the winter (Figure 1). While there is nothing spectacular about the high end of the range, the low end impacts the functionality of pneumatic actuators.

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Solar-powered Valve Actuation: An Update

vmspr12_solar_actuators

The use of solar power in industrial and municipal valve actuator applications goes back several decades; however, technological advances in solar power efficiency and storage mean that today, it has become a practical, dependable alternative for many isolated locations.

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Hydraulic Actuators Gaining in Use

vmsum11_actuators

Although the actuator market is dominated by pneumatic and electromechanic products, a growing number of niches require the performance levels of electrohydraulic actuators.

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The Human Factor in Valve Operation

VM-spg11-Arrestor


Worker safety, efficiency and the cost of operations, and most recently, new methods of control, are key focal points in operating valves. One factor that affects all areas is the role and level of human involvement in the processes.

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Valve Magazine Digital Edition

14 SUM CVR 160x214Inside the Summer 2014 issue…

• Attracting Talent
• Advances in Machining
• Severe Service in Power Plants
• SIS Tests and Standards

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