On May 14, 2013 time base after-sale engineers by changsha to jiangyou, sichuan province, to his power station site.

wu hydropower station profiles: stop river dam, a stronger capacity of 5. 7. 2 billion cubic meters, the dam is 120 m high, 3 installed capacity of 150000 kilowatts, annual output 6. 24. 4 billion kw.

the debugging equipment model for wu on all the technical water supply system for power plant unit 3 # ZJY46H piston type pressure reducing valve ( DN200 - 16C） 。

wu all the technical water supply system for power plant overview: pipe flow is 420 m after/h, pressure reducing valve installation height is 565 m, tail water level is 573 m, before and after the equipment pressure P1 = 0. 6Mpa、 P2=0. 4 mpa, throttle cones open height is 72. 5 - 60 = 12. 5mm。

time base after-sale engineers in the technical water supply system of 3 # unit pressure reducing valve of debugging, debugging steps are as follows: because all three units are connected by a main power station, the 3 # unit pressure reducing valve outlet gate valve open approximately half height, make the unit cooling water back into the relief Industrial Valves, began to debug for pressure reducing valve.

open the drain valve on the pressure reducing valve feedback system, the air inside the discharge valve, close the drain valve and vent nut loosen the pressure conduit below, discharge pressure in the pressure regulation, closed exhaust nut, open the pressure reducing Industrial Valves before the valve gate Industrial Valves, pressure reducing valve filling water, the pressure regulating cavity pressure forces the pistons to overcome the main spring upward movement, make the safety lever up. Due to the outlet pressure P2 value decreased, the adjusting screw to press five laps, outlet pressure P2 value rise, setting outlet pressure P2 value, fully open valve valve gate valve, outlet pressure stability.

in two units of a pressure reducing valve for cooling water, the outlet pressure P2 values fell. Through calculation and analysis, wu LAN traffic is needed for all power station after 420 m/h, when the two units of a pressure reducing valve for, need 840 m after/h of the flow. The flow for the diameters of DN200 pipe velocity of over 8 m/s, so in all contact operation of the power plant is difficult to implement for two.

after the debugging, the era of after-sale engineers on power plant operation maintenance personnel ZJY46H was introduced in detail the component composition and working principle of piston reducing valve, and for power plant technical staff answer questions one by one.

owner assessment: through debugging test, the machine ZJY46H - 3 16 valve works well, work well!

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