Product News: Sensors, Monitors & Transducers
LVDT Linear Position Sensors aid steam turbine valve control.
Press Release Summary:
November 23, 2012 - Engineered for valve position sensing applications for steam turbine control systems in electric power generation plants, PG Series offer 5 FS ranges from 0–3 in. to 0–15 in. LVDTs of PGHD Heavy Duty series and PGSD Super Duty series have 1 1/16 and 1 5/16 in. dia bodies, respectively. Offered with rigid or ball joint coupling, 3/8 in. dia operating rod captivates core so it never comes out or vibrates loose. Body clamps, flange mounts, ball joint couplings, and rod eye ends are included.
Original Press Release
Ruggized LVDT Linear Position Sensors Designed for Steam Turbine Valve Control Systems
Press release date: November 15, 2012
Alliance Sensors Group's approach to their PG series LVDT design for the power generation industry started with the premise that the LVDT must be extremely rugged, so these units feature a large diameter housing with a very thick wall and a versatile mounting configuration. A PG series LVDT's 3/8 inch diameter operating rod captivates the LVDT's core so that it can never come out or vibrate loose. This rod is offered with either a rigid coupling or a ball joint coupling that can be helpful in installations where there is a minor misalignment with the attachment mechanism on the steam valves. PG series LVDTs utilize materials and manufacturing processes that can be certified for use in mild radiation environments found in boiling water reactor nuclear power plants.
Key features requested by the power gen marketplace embodied in the PG series LVDTs' design include:
• Cores that absolutely cannot break loose from the core's connecting / operating rod
• Installation features like standard body clamps, flange mounts, ball joint couplings, and rod eye ends
• Two double contact shaft seals prevent contaminants from getting inside the LVDT's bore
• No connector--- the sensor has screw clamping terminals that accept No. 24-14 AWG wire
• Continuous sensor operation in ambient temperature up to 350 degrees F (175 C)
• Two (2) year warranty and an over-temperature indicator built into sensor
Alliance Sensors Group PG Series LVDTs are available in five full scale ranges from 0-to-3 to 0-to-15 inches (75 to 380 mm). Models include the PGHD Heavy Duty series LVDT with a 1-1/16 inch body diameter and the PGSD Super Duty series LVDT with a 1-5/16 inch body diameter. Either series is available certified for operation in mild radiation environments at extra cost.
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