◇ Overview GSZ type overspeed limiter is a safety device Hydro group. When running the unit due to the cause of the accident, the speed rises above the rated speed to a predetermined value, and Qiayu speed control system malfunction, accident signal at this time to accept the action of the product, water guide emergency shutdown, thereby preventing the turbine speed Plaza . ◇ characteristics and principles of the product set accident distributing valve, flow restrictor, throttle, valve, solenoid valve in one of each function. With field operations function. The product is coupled governor main pressure valve and the guide vane mechanism servomotor closing chamber and open chamber. Because three different diameter of the piston, under pressure from the main oil pressure valve, the piston is always in the position as shown. At this closing chamber governor main pressure valve and opening the chamber of the guide vane mechanism servomotor closing chamber and open communication, the limiter has no effect, the governor does not impede normal work. When the unit control signal to the solenoid valve switching, pushing the piston moves. Governor main pressure switch valve and servomotor oil passage, and the pressure oil into the servomotor closing chamber to force the unit shut down, to prevent accidents. After the product operation, the piston is in the self-holding state, the relay is closed only when the chamber through the pressure oil reset. An indication rod at the same time, to determine its extended length of the piston stroke meets the design requirements. ◇ main technical parameters Working pressure:? 2.5MPa, 4MPa, 6.3MPa nominal diameter:? 80mm, 100mm, 150mm Operating voltage:? DC110V, DC220V ◇ installation and maintenance GSZ overspeed limiter dimensions shown in Table A?. ? Before taking over the road, inner tube should be clean, without iron, iron rust and other dirt. ? Is factory experiment qualified, not an exploded assembly site. ? When you install non-mounted splash water and note the location where each interface, do not pick the wrong pipe. ? The product normal after installation, you can put to work without special maintenance, such as problems please contact our plant. Table I: overspeed limiter installation size model Φ Φ1 Φ2 Φ3 L L1 L2 L3 L4 L5 center height H Φ4 H2 Φn GSZ-80 80 90 50 57 720 240 240 224 170 205 204 204 176 28 GSZ-100 100 110 80 90 920 300 300 280 213 240 250 280 220 34 GSZ-150 150 160 100 110 1260 450 450 385 260 300 400 370 310 38 ◇ Selection Help GSZ- □ - □ / □ Power supply working oil pressure nominal diameter overspeed limiter