For more than a decade, San Diego Gas & Electric (SDG&E) used a mass spectrometer to detect leaks in sea water-cooled condensers, turbines and hydrogen cooling systems, but the instrument was heavy, bulky and offered slow leak detection response times.
The high-power (to 65 kVA), high-voltage (to 60 V dc), high-frequency-switching IGBT dc-ac inverter provides a source of controllable, industrial quality ac power for use on mass transit vehicles. Variations of these products can supply utility grade, three-phase ac power from solar and solar/diesel hybrid generated high-voltage dc. Company`s mechanical components group also offers high-temperature/high-pressure, mainshaft, gearbox and segmented seals; bellows; valves; brushless dc cooling fans;
Electric actuators, capable of operating all types of quarterturn valves (butterfly, ball and plug) and multiturn valves (gate and globe), operate dampers (louver, guillotine and diverter). They are furnished for open/close and modulating service. Actuators are furnished with user-friendly features such as: counter gear-driven limit switches, open and close torque switches, plug and socket electrical connection, side-mounted handwheel, modular design and detachable output drive assemblies.
Water is literally the lifeblood of most power plants. To serve a plant`s needs, water has to be prepared, or treated, to ensure that it is pure and free of elements that may harm or degrade plant systems. This month`s special feature contains three good examples of how plant engineers are managing and treating the water resources at their facilities.
Name a power plant that doesn`t rely on valves to control its many systems. Impossible, right? Valves are such an integral and reliably simple component that its relative importance to other components is often forgotten. Nevertheless, valve manufactures continue to perfect valve designs to perform a variety of tasks and to function reliably for longer and longer time periods no matter what the duty. This month`s "Tech Roundup" focuses on some of the new valve technology available from the indus
Several organizations are cooperating in the 1995 International Clean Water Conference sponsored by the Electric Power Research Institute (EPRI). It will be held November 28-30, 1995. They include the Pittsburgh Energy Technology Center, PowerGen of the United Kingdom, IEA-Coal Research, the California State Water Resources Control Board and the Empire State Electric Energy Research Corp. Winston Chow and Robert Brocksen of EPRI will cochair the program at the Sheraton Grande Torrey Pines Hotel
Seventy-page handbook provides detailed information on how to reduce the operating costs and increase th efficiency of steam and water systems. The Temperature Control Valve and Steam Trap Applications Handbook covers a range of process steam and water system problems. It provides detailed discussions of the relative merits of the options available to engineers and presents economical solutions to the most common steam and water control problems through the application of temperature-actuated va
Three-piece bolted ball valve features raised face-on-end plates to assure positive alignment and eliminate radial piping stresses, live-loaded Chevron stem seals to extend packing life and reduce fugitive emissions, completely enclosed end plate seals and blowout-proof stem. Three-piece ball valve has a maximum pressure rating of 2,500 psig and an operating temperature range of -65 to 550 F. Valve has 0.500-inch orifice.
Series 746, a new line of compact, high-capacity safety relief valves, is designed primarily for both saturated and superheated steam service applications. It is capable of relieving air and fluid services such as water, oil and chemicals. The compact, high-capacity design allows the user to cut costs while achieving equal capacity and performance. The smaller design is also beneficial on applications where size and weight are concerns. Features include a full-lift design that ensures the highes
Series 52000 diaphragm actuator offers a more responsive relationship between travel and air pressure, since there is less friction and hysteresis than with piston actuators. This results in more accurate response to the instrument signal and tighter control of the process fluid. The Series 5200 diaphragm actuated control valve is designed with a heavy duty, one-piece yoke.