What Is The Oil Filter Machine Of Huazheng?

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What Is The Oil Filter Machine Of Huazheng?

2026-01-30

Transformer oil insulates and cools critical components, but contamination gradually breaks down its dielectric strength. The HZLY-50A oil filter machinerestores used oil by pulling out water that accelerates insulation aging, extracting gases that cause Partial Discharge, and filtering solid particles down to 1 micron. It also supports vacuum drying of equipment internals and hot oil circulation during transformer commissioning or repairs.

1.How The Oil Filter Machine Works?

The oil filter machine relies on vacuum dehydration. Raw oil first passes through a coarse strainer to catch large debris, then enters a heater that brings it to 20–80°C. From there, the warm oil sprays into a vacuum chamber operating at ≤5 Pa. Under this extreme vacuum, dissolved water and gases flash into vapor immediately and get pulled out by the pump system. Clean oil then moves through precision filters before returning to the tank.

2.The Performance Specs of Oil Filter Machine

Flow rate: 3,000 L/h
Cleanliness: 1 micron filtration
Vacuum capability: ≤5 Pa ultimate vacuum
Power: 36kW, 380V three-phase
Noise: ≤75 dB

The unit improves oil quality dramatically. Input oil at 30kV breakdown voltage and 50ppm moisture exits at >80kV with ≤2ppm water content. Gas content drops from 10% to under 0.1% by volume. Built for field work, it runs continuously for 200+ hours with MTBF exceeding 5,000 hours.

3.The System Layout of Oil Filter Machine

The HZLY-50A oil filter machine combines several subsystems: inlet/outlet pumps (Kracht Tech), a 30kW oil heater, dual vacuum pumps (primary plus Roots booster), and a three-stage filtration train (coarse, 3-micron, 1-micron). A PLC with touchscreen automates the sequence and monitors temperature, pressure, and levels. Level sensors and control valves manage the oil path while a condensing unit handles the extracted vapor.

The design leverages quality components—Taiwanese liquid level sensors, European pumps, and domestic control systems—to deliver reliable purification without removing transformers from service.

4.Product Hydraulic Schematic Diagram

5.Main Product Parts List

NO.	Item	Function	Notes
MV01	Oil outlet valve	Control the oil output
MV02	Oil inlet valve	Control the oil input
MV03	Oil outlet valve	Control the oil output	Optional
MV04	Oil inlet valve	Control the oil input	Optional
MV07	Gas supplementation valve	Refill the air in the degassing chamber during shutdown or maintenance
MV08	Vacuum valve	The equipment is used as a Vacuum Pump Set to isolate the vacuum chamber
MV09	Sampling valve	Sample the oil after treatment
MV10~16	Drain valve	Empty vessel
CV01~02	Check valve	One-way oil transmission to prevent the return of oil
FL01	Primary coarse filter	Filter large particles of impurities
FL02	Second-stage precision filter	Filter more than 3µm of impurities
FL03	Third-stage precision filter	Filter more than 1µm of impurities
FL04	Air filter	Filter out particles from the air
SV01	Oil inlet solenoid valve 1	Level control valve
SV02	Oil inlet solenoid valve 2	Level control valve
LS01	Heating level sensor	Collect the heater level signal
LS02	Liquid level sensor	Collect liquid level signal
LS03	Liquid level sensor	Collect liquid level signal
LS04	Condenser level sensor	Collect condenser liquid level signal	Secondary oil spray protection
PES	Foam level sensor	Collect foam level signal	Oil spray protection
PT01	Filter pressure sensor	Collect filter pressure signal	Optional
PT02	Vacuum pressure sensor	Collect vacuum pressure signal	Optional
TT01	Temperature sensor	Collected oil temperature signal
WT01	Moisture sensor	Detect the moisture content of the oil	Optional
OM01	Flow meter	Detecting pump flow	Optional
PS01	Pressure switch	Oil pump discharge pressure high protection
HT	Heater	Heat the oil to be treated
P01	Vacuum pump	Primary vacuum extraction
P02	Oil delivery pump	Drain the oil from the vacuum separation chamber
P03	Roots pump	Two-stage vacuum extraction
P04	Inlet pump	Controlled oil feed	Optional
Vacuum Chamber	Vacuum separation chamber	Remove the water and gas from the oil
Cooling Unit	Condensing unit	Reduce the temperature of the gas entering the vacuum system
Foam Eliminator	Supercharger defoamer	The foam is pressurized into oil
VG01	Vacuum gauge	Show the vacuum degree of degassing chamber
PG01	Pressure gauge	Display filter pressure