Bladder NXQ-A-0.63 20-L-Y & Servo Valve J761-003A

Bladder NXQ-A-0.63/20-L-Y & Servo Valve J761-003A Maintenance Guide
Product Introduction
The Bladder NXQ-A-0.63/20-L-Y is a critical component for accumulators in steam turbine DEH oil systems, working in tandem with the J761-003A servo valve. The response accuracy of the J761-003A directly impacts the control valve’s ability to keep up with load changes, and its stable operation relies on three key factors: oil cleanliness, installation alignment, and regular calibration.

Key Maintenance Points for J761-003A Servo Valve
Ensure oil cleanliness: Impurities in fire-resistant oil cause valve core sluggishness. Replace the J761-003A oil inlet filter every 3 months, and avoid touching the filter with hands to prevent contamination.
Precise installation alignment: Align the valve core and hydraulic actuator stem with a deviation ≤0.1 mm. Use a dial indicator on the stem to check; adjust the mounting bracket if the needle swings >0.05 mm during core rotation.
Regular calibration: Monthly calibrate with dedicated instruments to verify synchronization between command and valve core displacement (10% command should correspond to 10% movement). Adjust the feedback potentiometer if deviation >0.5%. A uniform hum is normal; a clicking sound indicates jamming, requiring disassembly and cleaning with a dedicated agent (not gasoline).

Applications & Brand Info
Suitable for steam turbine DEH oil actuator systems, paired with NXQ-A-0.63/20-L-Y bladder to ensure stable unit load control.
Provided by YOYIK, a leader in the electromechanical equipment industry with a full product line covering hydroelectric/coal-fired generator sets and accessories. ISO9003 certified, YOYIK offers authentic direct sales and all-round services, becoming a preferred partner for many users.

The above is for reference only. Please contact me via email for specific details.

We have abundant inventory of spare parts required by the factory, including:
#DF-Bladder　NXQ-A-0.63/20-L-Y-DF
Hand-wheel globe valve KHWJ50F1.6P
Electric stop valve J961Y-600LB
Stop valve J61Y-P51150V
solenoid valve D3DW20BVTPZ5
Lock washer DG600-240-03-24
pump DFB-II-125-80-250
oil pump CPA3-25-E-20-R6.3
Stop valve J61Y-P55140I
Gearbox MO2225.OBGCC1D1.5A
Sealing ring HB4-56J1-34
valve set HM451U3331211*TH13
Mechanical seal BGM32N24
Parker D3FB E01U C0N-S03
Check valve H67Y-2850LB SA-182 F91
pressure relief valve YSF8-85/80-KJ
Skin NXQ1-L63/31.5-A
Unloading valve CVI-25-D11-L
Bearing 7318
solenoid valve DSG-03-3C2-A240-N1
Pneumatic steam trap J661Y-P55140V
solenoid valve D1VW020HVZP91XB510
sealing oil differential pressure valve 977HP
Seal retaining ring 4Pcs // spacer ring P19182D-00 P19182D-00
Accumulator Bladder for GV with seals NXQ-AB-40/31.5-L-E
External gear pump AZPW-21-004 RQRXXMB-S0593
Throttle valve L61H-40
thermometer SH01.91.07-1
The electromagnetic valve DXJ5-DOL100/10N/E0K11
Wet solenoid directional valve 4WE10Y5X/EG220N9K4/V+1×Z4
sealing ring HB4-56J8-65
cartridge valve CV1-16-D11-L
Bladder　NXQ-A-0.63/20-L-Y

Pressure relief valve FS741Y/X-6
EH oil station solenoid valve 4WE6D-L6X/EG220NZ5L/B08
gate Z561Y-100
pressure relief valve YSF8-35/130-TH
Swing Check Valve H44Y-40C
Valve diaphragm KS250ZXN016BQ12SN0ERH
Solenoid valve seat (including sealing ring) BALDWIN SK9189
servo valve H19JOGM5VBH
pressure relief valve YSF8-35/80-KJTA
IPSV/valve stem E1-T2-M4172-01
gasbag NXQAB-32/31.5-F-Y
RUBBER BLADDER NXQA - 1 6 /20 L-A
solenoid directional valve D1VW004CNJW91
oil pump PVH98QIC-RSM-1S-10-C25-31
Solenoid valve 8030G66220VAC
EH oil circulating pump F3V201S8S1C11
Solenoid valve 4WE6J62/EW230N9K4 B10
PTFE shaft seal 5-4493-1300-03
Mechanical shutdown electromagnetic coil DFP-A1-DC220V
Globe valve WJ20N-40P
Oil unloading pump 2CY-18/0.27
Pressure regulating valve PAF18-12.5-2
Electric gate valve Z962Y-250 WCB
Corrugated globe valve WJ32F-1.6P
reducer M01225.OBGCC1
O-ring 5-4490-1070-00
Double headed bolt HPT300-340-01A-07
pump shaft 2S-185
servo valve 072K4160
Safety valve A48SB-64
gasket 03506-300/311/415 part no.:93
Bladder　NXQ-A-0.63/20-L-Y

DFYLCTY-2026-1-14-A