3, the location and effect of specific applications

     Linhai City, Zhejiang Province, Chai Tan Hydropower Station using automated equipment Zhejiang Pingyang two production D741X-10 heavy hammer-type brass gate valves. Patterns for the hybrid power station, a pressure tunnel 1100m, diameter 2.6m, the pressure of the tube length 50m, diameter 1.2m, design head 45.5m, the maximum head 47m, design flow of 1.8m3 / s, turbine HL220-WJ-50A, power generation Machine SFW-630-6/990 (excitation shunt reactor), rated voltage 400V, rated capacity of 630kW, rated speed 1000r/min. 2 January, 1991 into the largest power grid to power in March 1993,
 
Total running two machines 7780h. A good heavy hammer brass stop valve operation, the evaluation is as follows: (1) action right equipment to achieve the safe production, the two valves to open 203 times the closure of 203 times, 100% accuracy rate movements; (2) the average time to open the electric 55s, load rejection set fast time for the 5s, the first rapid increase in speed to reduce the rate of increase in the rate of 40% of control, the slow clearance time set to 20s, after the slow rate of increase is to reduce water pressure, an increase rate of 21 % of; (3) In the course of the accident unit down too fast, when more than 1.4 times the rated speed, the device made by the gun, heavy hammer automatically release the closure of inlet valves, to avoid accidents expanded security operation.