Exclusive steam turbine AST Solenoid Valve HQ16.17Z

Date:2020-11-17 15:39:03 Visits: Author:Dongfang YOYIK Engineering Co; Ltd,

Exclusive steam turbine AST Solenoid Valve HQ16.17Z

AST system is the automatic stop trip system in steam turbine control. In the AST solenoid valve HQ16.17Z, the control oil passes through an orifice inside the unloading valve and acts on the upper part of the cup-shaped slide valve of the unloading valve. The force of the control oil is combined with the spring force of the small spring inside the unloading valve to press the cup-shaped spool valve of the unloading valve on the valve seat, sealing the oil return channel at the bottom of the main steam valve actuator.

 

When the unloading valve adjusting rod is rotated out in the reverse direction, or when the AST solenoid valve is de-energized and opened, the AST control oil is connected to the non-pressure return oil, so that the slide valve operates under the action of oil pressure to open the pressure Oil return channel. In this way, the main steam valves are quickly closed under the action of the spring force of the operating seat.

 

  

YOYIK provides multiple types of spare parts and equipments for power plant :

300MW turbine main oil pump motor coupling 70LY-34*2

stator cooling water pump DFB-80-80-240

300MW turbine main oil pump guide vane 70LY-34*2-1

differential pressure Regulating valve ZZCN-10B

relief valve 98H-109

Tooth belt SA-22A 3VX560

gear pump CBF-E-25P

pressure hose SMS-10-1524-B

accumulator oil-return globe valve SHV6.4

Pressure relief valve filter AW20-NO2H-CZ

pressure hose SMS-10/20-1524mm-B

Accumulator bladder 10L OD190*H425MM φ22MM

Hydrogen Circulating fan XHF-III

300MW turbine main oil pump guide impeller 70LY-34*10

EH oil feeder 

metal spiral gasket 

mechanical trip valve F3DG5S2-062A-50-DFZK-V

Flowmeter LZB-10

solenoid valve 4WE6E6X/EW220-50NZ5L

RING, ANTI EXT DG600-240-07-02(4)

EH Recirculating oil pump F3-V10-1S6S-1C20

stainless steel bellows globe valve 80FWJ1.6P

casing wearing 326*340*38

sealing oil Re-Circulating pump coupling HSNH280-43NZ

pipe panel 11500mm

screw pump HSNH210-46A

pipe joint HQ10.11Z-1

DFYL-2020-11-17-MY