ZLYC Double Stage Vacuum Oil Purifier for Transformer & Turbine Oil Dehydration

Oil Filtration Machine manufactured by XINXIANG LIFEIERTE FILTER CORP., LTD delivers full-spectrum oil purification solutions for power stations, metallurgical plants and petrochemical enterprises. Our ZLYC series double stage vacuum oil purifier adopts low-temperature vacuum flash evaporation technology, specialized to remove dissolved water, free gas and micro solid contaminants from insulating transformer oil, steam turbine oil and heavy-duty hydraulic lubricating oil. Equipped with three-stage gradient precision filtration system and intelligent automatic control cabinet, this equipment solves oil emulsification, insulation strength decline and equipment wear issues caused by polluted industrial oil. All production processes follow DL/T 521-2018 power industry standard and ISO9001 quality system certification, with stable long-term operation performance under continuous 24-hour working conditions.

1. Basic Introduction to ZLYC Vacuum Oil Purifier

ZLYC vacuum oil purifier is a core dehydration and degassing equipment under our oil filtration product line, designed based on different boiling points of water and mineral oil under negative pressure environment. The machine integrates vacuum separation system, heating constant temperature system, multi-stage precision filtration system and closed cooling condensation system into one mobile unit. It supports offline oil regeneration, new oil filling filtration and online bypass purification for various large oil storage systems.

1.1 Core Working Principle

Polluted oil enters primary coarse filter to intercept large metal debris and carbon particles, protecting internal oil delivery pump;

Cleaned oil flows into constant temperature heating tank, heated to 40–75℃ to reduce water boiling point;

Hot oil is sprayed into vacuum tank through atomization wing to form ultra-thin oil film;

Under high negative pressure ≤-0.095MPa, water inside oil vaporizes rapidly into water vapor;

Vacuum pump extracts mixed vapor into air-cooled condenser, water vapor condenses into liquid and is collected in drainage tank;

Dehydrated, degassed oil passes secondary & tertiary fine filters to capture micro impurities, then flows out for recycling.

2. Core Structural Advantages

Double-stage vacuum separation design, residual water content after treatment down to 5–30ppm;

Three-layer gradient filtration system, final filtration precision up to 3.5μm;

Intelligent constant temperature control, overheat automatic power-off protection to avoid oil deterioration;

Anti-foam built-in baffle, effectively prevent oil overflow under high vacuum;

Air cooling condenser without external cooling water, suitable for field mobile operation;

Integrated mobile base with heavy-duty casters, convenient transfer between workshop and substation;

Full closed pipeline layout, no oil leakage, low noise vacuum pump;

Automatic liquid level balance valve, stable oil inlet and outlet flow without manual adjustment.

2.1 Complete Technical Parameter Table

Item	ZLYC-50 Standard Model Parameter
Rated Flow Rate	3000 L/H (50 L/min)
Ultimate Vacuum Degree	≤ -0.095 MPa
Working Temperature Range	40 ~ 75 ℃
Three-Stage Filtration Precision	100μm / 10μm / 3.5μm
Residual Water After Purification	≤ 30 ppm
Residual Gas Content	≤ 0.2 %
Total Installed Power	12.5 kW
Power Supply	380V 3-phase 50Hz
Overall Dimension	1600×950×1380 mm
Net Weight	420 kg
Applicable Oil Medium	Transformer oil, turbine oil, hydraulic oil, compressor insulating oil

3. Wide Application Scenarios

Power Industry: Substation transformer oil maintenance, steam turbine lubricating oil regeneration, wind gearbox oil purification;

Metallurgical Factory: Heavy hydraulic station offline oil cleaning, rolling mill circulating oil dehydration;

Petrochemical Plant: Compressor insulating oil treatment, hydraulic system bypass filtration;

Machinery Manufacturing: Large equipment new oil filling, long-term storage oil recovery.

3.1 Actual Engineering Application Case

In 2025, a regional thermal power station purchased 3 sets ZLYC-100 vacuum oil purifiers for 110kV transformer oil routine maintenance. Before purification, transformer oil breakdown voltage was only 28kV with serious emulsification. After continuous 2-hour treatment by our equipment, oil dielectric strength rose to 68kV, water content reduced from 220ppm to 18ppm. The power station extended transformer oil replacement cycle from 1 year to 3 years, cutting annual oil procurement and waste oil disposal cost by over $15,000.

4. Industry Standard Compliance & Quality Guarantee

Comply with DL/T 521-2018 Vacuum Oil Purifier Industry Specification for Power System;

ISO9001, CE certified whole machine, all pressure vessels pass air tightness test before delivery;

24-hour continuous running aging test for each finished machine to eliminate hidden failure risks;

One-year full machine warranty, lifelong spare parts supply and remote technical guidance;

Support customized flow, voltage and explosion-proof structure for special working conditions.

5. Matched Supporting Products

ZLYC series large flow vacuum oil purifier

Coalescing separation oil purification equipment

Mobile bypass oil filter trolley

Multi-specification hydraulic filter elements

Online oil quality testing device

6. FAQ Section

Q1: What oil types can ZLYC vacuum purifier handle?

A: It fits insulating transformer oil, steam turbine oil, gear lubricating oil, general hydraulic oil and compressor oil. For high-viscosity oil above 320cSt, we provide customized heating and pump structure.

Q2: Can this machine remove both water and tiny solid particles at the same time?

A: Yes. Vacuum system eliminates dissolved water and free air, three-stage gradient filter traps metal powder, carbon and oxide particles synchronously, one-step complete oil regeneration.

Q3: Is mobile transfer available for outdoor substation use?

A: Equipped with wear-resistant silent universal casters and integrated pull rod, the whole machine can be moved freely without disassembly, suitable for outdoor field operation without fixed workshop.

Q4: Can voltage and flow be customized according to local power grid?

A: Customization service is supported, including 220V, 415V, 440V power supply and flow range from 25L/min to 500L/min. Explosion-proof cabinet can be configured for chemical flammable environments.

Q5: How long is the service cycle of internal filter elements?

A: Under conventional power station working conditions, the fine filter element can run 400–800 hours. The gradient fiber material has strong dirt holding capacity to extend replacement cycle.

Brief Summary

ZLYC double stage vacuum oil purifier is mature industrial oil regeneration equipment independently developed by our factory, focusing on dehydration, degassing and impurity removal of insulating and lubricating oil. Combined with standard vacuum separation and multi-stage precision filtration technology, it effectively restores oil insulation and cleanliness to new oil standard. With mobile structure, intelligent control and complete safety protection, it has become standard supporting equipment for global power, metallurgy and chemical enterprises to reduce oil consumption and extend equipment service life.

Reference Sources

DL/T 521-2018 Technical Guide for Vacuum Oil Purifier Operation in Power Industry

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