◇ Overview SP-type accident distributing valve 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, the emergency shutdown of gate mechanism to prevent runaway turbine . ◇ characteristics and principles of the product set main valve, the flow restrictor throttle all functions in one. 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. At the same time it has indicated to determine its extended length of the piston stroke meets the design requirements. ◇ main technical parameters Working pressure:? 2.5MPa, 4MPa. ? Nominal Diameter: 80,100,150mm. ? Connection: flange connection. ◇ Selection Help SP- □ - □ / □ operating pressure of the working voltage nominal diameter accident distributing valve ◇ appearance and installation dimensions model Φ Φ1 Φ2 Φ3 L L1 L2 L3 L4 L5 center height H H1 H2 Φn SP-80 80 90 50 57 555 240 240 224 170 205 204 204 176 28 SP-100 100 110 80 90 650 300 300 280 213 240 250 280 220 34 SP-150 150 160 100 110 810 450 450 385 260 300 400 370 310 38