Screw Pump HSNH440-46 & 02-125801-3C Seal Replacement

Screw Pump HSNH440-46 & 02-125801-3C Seal Replacement Guide
Product Introduction
The Screw Pump HSNH440-46 is a core fluid transmission component for power station fire-resistant oil systems, featuring stable operation and high reliability. It is matched with the fire-resistant circulating pump seal 02-125801-3C, whose replacement efficiency directly affects the screw pump’s continuous service. Produced by YOYIK, the HSNH440-46 integrates exquisite craftsmanship and durable performance, meeting the rigorous requirements of thermal power, hydropower and new energy projects.

Efficient Replacement Steps for 02-125801-3C Seal

To save time and reduce labor costs when replacing the 02-125801-3C seal, focus on tool preparation and process simplification, avoiding unnecessary pump disassembly:
- Tool Preparation: Prepare a puller, seal mounting sleeve, and torque wrench in advance. Do not use regular wrenches for disassembly, as they easily damage the pump shaft.
- Old Seal Removal & Cavity Cleaning: Use the puller to clamp the seal’s outer ring, turn the puller screw clockwise to slowly extract the old seal—avoid forced removal to prevent damage to the pump shaft’s sealing section. Wipe the sealing cavity with a cloth; do not use sandpaper to avoid scratching the cavity wall and affecting the new seal’s performance.
- Post-Replacement Inspection: After installation, rotate the pump manually several times, then start the pump and check for leaks. Two people can complete the entire process in 40 minutes, saving 2 hours compared to full pump disassembly.

About YOYIK
- Located in Deyang, Sichuan, YOYIK is a comprehensive power station equipment and accessories company integrating R&D, manufacturing and sales, renowned for exquisite craftsmanship and strict quality control.
- Provides key components for domestic and foreign thermal power, hydropower stations, and involves new energy fields such as wind energy and nuclear energy, demonstrating strong innovation and adaptability.
- With customized services and global market layout, it has become a trusted partner for many large-scale projects.

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

We can provide a variety of spare parts for power plants, as follows:
#DF-Screw pump HSNH440-46-DF
AST solenoid valve 73B.776.5Z0616SJ
solenoid valve coil 22FDA-F5T-W220R-20/LB0
Vacuum stop valve DKJ940H-100
Globe valve SS-1KSS8MM DN8
pressure relief valve YSF16-25/50-KJ
Electromagnet D1VW020BVZP91XB510
Check valve H67Y-2000LB A105
Oil supply pump SMH80R42E6.7W21
solenoid valve 4WE10D5X/EG110N9DK6L/V
pipe clamp SP650PADP-AS
Manifold components 0505.1958T0301.AW101
globe check Throttling valve KJC65-16
solenoid valve J-220VDC-DN10-DOF/20D/2N
Diaphragm for the matching cylinder of the regulating valve 100ZXN016BQ12SNOERH
servo valve 761-3034B
Stop valve J41W-64P
vacuum pump reducer M01225
Couplings-with valve 20KBIW10EVX
Angular contact ball bearing 7319 BECB
Bellows globe valve core WJ25F1.6P-II
Check valve H64H-25 WCB
Stop check valve KJC501.6P
OIL COOLER USED FOR INGERSOLL RANDCOMPRESSOR MODEL MM200 22084735
Differential pressure valve FISHER977HP2""
Plexiglass tube 30-WS-32
RUBBER BLADDER NXQ-A-6.3L/31.5-L-Y
EH oil seal O-ring HY-SO-0148-V
Electromagnetic valve coil 300AA00046A
Accumulator NXQ1-L80/10/304
Hexagon tube plug Q/D9403 NPT3/4
Shaft sleeve HZB253-640-01-10 part no.:28
Screw pump HSNH440-46

Recirculation pump framework oil seal TCM-279499
relief valve DB10A-5X/31.5
balance valve ZZPN-10 DN25 PN1.6
The electromagnetic valve C3635000
Servo valve QDY6
ACCUMULATOR NXQ-A-32 31.5-L-Y
Needle globe valve WSJ-SN1V08FODDN8
Sealing oil pump of steam turbine generator ACG045N5IVBP
accumulator bladder NXQA-16/31.5-L-Y
VAE 73218BN4UNNOC111C2
Globe valve WJ25F2.5P
Muffer PN 01001765
Coupling bolts 125LY-23-9
pressure hose SMS-12-3048mm-C
solenoid valve HQ16.11Z
Nitrogen accumulator model NXQ-A-10/31.5-LE
Rubber Bladder for ST EH Oil Accumulator A-10/31.5-L-EH
Directional valve 4WE10E31B/CW220-50N9Z5L
Measuring hose S100-AC-AC-0100(M16*2-G1/4)
Fluorine rubber ring C8689537
Vacuum Gate Valve DKZ41H-16C
Accumulator NXQ1-L40/31.5H
GEAR PUMP 2P82 6D G28PI-V-VS40
solenoid valve 4WE10D-20/AG220NZ4
Valve Spring 8-YT668Y64150
Oil Pump 02-341950
chain PLJC500
Safety valve A21Y-64
gate TB213.6-2006
Solenoid valve 4WE6YL6X/EG110NZ4-V/BO8
Inflatable seal- dome valve 200DV (silicone) Poids net 0, 445 P17460C-01
Screw pump HSNH440-46

DFYLCTY-2026-1-16-A