Servo Valve G771K202A for Power Plant Application – Dahanu Power

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Servo Valve G771K202A for Power Plant Application – Dahanu Power

Product Introduction

The Servo Valve G771K202A is a core component of DEH systems in Dahanu Power Plant's 2×250MW coal-fired units. It adopts a two-stage nozzle-flapper design with a dry torque motor, converting electrical signals into precise hydraulic output to control steam valves. This design is capable of adapting to mixed coal combustion and seawater cooling conditions, ensuring stable operation of the three-cylinder reheat condensing turbines.

Product Features

  • Max working pressure 210bar (3000psi), rated flow 4~17L/min, operating temperature range -29℃~+135℃
  • Step response time 4ms, FKM seals, ISO 10372-02 mounting, lightweight (0.86kg) design
  • Mechanical feedback structure, resolution <0.5%, low hysteresis, strong anti-vibration performance
  • Compatible with petroleum-based hydraulic oil, IP20 protection, suitable for DDC-MIS control system

Applications

  • 控制再热主蒸汽阀和调节阀,满足混合煤燃烧的需求
  • Ensures precise load adjustment of 250MW units, supports SCADA centralized control
  • Adapts to seawater cooling system conditions, ensures stable DEH operation for long-term service
The above is for reference only. For specific details, please contact me via email.

As a leader in the electromechanical equipment industry, YOYIK has a rich product line, covering hydroelectric generator sets, coal-fired generator sets and their accessories, as well as the processing of electrical and electronic products. Based on scientific management, the company has passed the ISO9002 quality system certification, adheres to authentic direct sales, and has become the preferred partner of many users with excellent quality and all-round services.

We can provide a variety of spare parts for power plants, as follows:

#DF-Servo Valve G771K202A-DF

Pressure Relief Valve YSF9-55/130-KJTH

Seal oil AC oil pump skeleton oil seal TC35*55*5

Stop Valve J61H-250 25

Pressure hose S100-AC-AC-0040(G1/4)

Stem C3Y201-3

STEM FOR FEED WATER LINE BLOCK VALVE T967H-42

Solenoid Valve 8262H134 220/50

Flexible Compensating Pipe NBY-150-20-01

Sealing oil vacuum pump rocker seal 141KZ. 11-68

Pinion shaft YOT46-508-05-03

Pressure Hose S110-AC-FA-0320

Wave Spring N-1916

Manual Directional Valve DG17V-3-22-NL-60

Y type stop valve 14G5DJ-F228G-50-2

Solenoid Valve HD4WE6E60/SG24N9Z5L/N

Hexagonal Nut GB/T6170-2008

Accumulator Bladder NXQ-A-50/31.5-L-E

Rubber Bladder for ST Lube Oil Accumulator NXQ-AB-80/10-L

pump PV063R1K1T1NFF1

sealing ring HB4-56J8-147

BFP AC oil pump mechanical seal 70LY-34

Electric stop valve J961Y-P55160V

Stop Valve ZH42-16P

Host EH oil system regeneration circulation pump F320V12A1A22R

Oil-water Alarm OWK-I

Main Water Supply Electric Gate Valve Z964Y-2580LBSPL

HP Accumulator MXQA-25/31. 5-L-EH

MOOG Servo Valve D633K2064 R08KO1D0HWX2

O-ring HY-SO-0046-V

valve stem KS100ZAZN16BQJ12SN020

accumulator bladder NXQ-AB-63/2-F-Y GB/T20663

Servo Valve G771K202A

Pressure hose SMS-20-2438mm-C

Pressure hose SMS-20-305mm-B

Balance Drum Liner FK5G32A-04-08

CYLINDER SC125X200-TCM1

Valve Seat 6-YT668Y64150

DFB Type single stage centrifugal pump DFBII 125-80-250

Main steam valve quick closing solenoid valve FRD. WJA3. 045-220VAC

Vacuum Stop Valve DkJ61Y-100V

Solenoid valve B43281006. 242 DC24V

4-way Valve 1F05404

Solenoid Valve SV310-02

Non Standard Couplings 191701

Cooling Fan YP2-90L-2

Main Bearing Seal UG13832

ACCUMULATOR NXQ-A-32 31.5-L-Y

Vacuum Pump KZ/100WS

bellows GJCFB-15

Oil spill valve DBDH10P10/31 5/V

Mechanical Seal HSNH660R40ZM1

axis DFB80-80-240-03

gate TB213. 6-2006

OIL MOTIVE O-RING 38×3.5

gate Z61Y-100

Solenoid valve 225B-121CAAA\1/4NPT

Stop Valve J11H-25

globe valve 65FWJ1. 6P

Accumulator bladder and seal ring NXQ-A-16/20-L-Y

Main Oil Pump Sealing Ring 156. 70. 01. 07(1)G01

Reheater inlet plugging valve SD61H-P42. 568V 12CrMoVG

Vacuum pump rear bearing P-1825B

sealing strip 185YR-43-1

Servo Valve G771K202A

DFYLCTY-2026-1-13-A

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