ZLYC Vacuum Oil Purifier for Transformer Oil Dehydration

As a reliable supplier of full-series oil filtration equipment, LEFILTER supplies various types of oil filtration machines, among which the ZLYC series high-efficiency vacuum oil purifier is our star model. ZLYC series vacuum oil purifier adopts three-stage filtration and vacuum separation technology to purify various industrial oils such as transformer oil and turbine oil. This movable oil cleaning machine runs stably with safe three-phase power supply, effectively removing moisture, air and fine impurities inside oil. Made of anti-rust carbon steel with optional stainless steel structure, it has multiple flow models for on-site maintenance in power plants and factories. We support OEM service, customized configurations and professional after-sales service for global buyers.

Product Application

Our ZLYC series vacuum oil purifier is widely adopted in power substations, thermal power plants, steel metallurgy factories, machinery manufacturing workshops and chemical processing plants. It specializes in the deep purification of transformer insulating oil and turbine oil, completes dehydration and solid impurity filtration for all kinds of hydraulic lubricating oil, upgrades the cleanliness standard of hydraulic circulation systems, and realizes full regeneration and repeated utilization of waste industrial oils, effectively cutting your cost of new oil replacement and equipment maintenance.

Product Description

1.Vacuum System

The vacuum system consists of vacuum separation tank, rotary vacuum pump, cooling condensation tank, liquid accumulation tank and automatic air make-up assembly. The internal tank adopts optimized flow channel structural design, which greatly enlarges the contact surface area between oil liquid and vacuum environment, and extends the retention time of oil inside the vacuum chamber. This design ensures thorough separation of water molecules and dissolved air inside oil, and fundamentally solves the oil spraying defect that frequently occurs on ordinary vacuum oil purifiers during continuous operation.

2.Three-Stage Filtration System

The machine is equipped with a complete three-stage gradient filtration system. The first-stage coarse filter with large aperture effectively intercepts large solid contaminants to protect the transfer oil pump and greatly extend the service life of subsequent fine filter elements. The second and third stages adopt gradient borosilicate glass fiber filter media with progressive pore sizes, which can capture tiny particles of different diameters layer by layer. The filter material owns large dirt holding capacity and optimized fold structure, which reduces surface flow velocity of oil and delivers stable, long-term filtration precision without frequent element replacement.

3.Constant Temperature Heating System

We apply segmented mild heating technology for oil warming, with low surface heat load less than 1.0W/cm², which avoids local overheating that leads to oil oxidation and deterioration. The oil temperature can be freely adjusted between 0℃ to 100℃ with automatic constant temperature control. A built-in flow protection sensor will automatically cut off heating power when oil flow volume is too low, preventing dry burning damage to heating tubes and improving overall operation safety.

4.Full Automatic Control System

The control cabinet is configured with frequency converter, liquid level transmitter, temperature sensor and vacuum degree sensor. All real-time operating signals of the machine are collected and transmitted to the central processor for unified analysis and automatic regulation of the whole unit. Multiple built-in safety protection programs cover overload protection, overpressure protection, dry-running protection and abnormal operation interlock protection, which can automatically alarm and stop the machine to eliminate hidden risks during unattended working hours.

5.Complete Machine Structure

The unit adopts an integrated rigid frame structure to reduce overall floor space. A detachable integral oil sump is installed at the bottom to collect leaked oil, realizing zero ground oil pollution and lowering workshop cleaning cost. Multiple structural types are available for selection, including mobile cart type with universal wheels, fixed station type, fully enclosed dust-proof type and vehicle-mounted mobile type to satisfy different on-site working conditions.

Applicable Oil Types

This vacuum oil purification equipment fits a wide range of industrial oils, including turbine oil, hydraulic oil, machinery lubricating oil, transformer insulating oil, capacitor oil and compressor oil. It can handle both new oil maintenance and waste oil regeneration for all above mediums.

Main Functions

• Deep Dehydration: Remove 100% free water mixed in oil and more than 95% dissolved water inside oil liquid. Water reduces lubricity of oil, accelerates oxidation and forms corrosive acid substances; our machine eliminates most water to protect pumps, bearings and sealing components.

• Efficient Degassing: Fully clear all free air bubbles and over 75% dissolved air contained in oil. Air shortens oil service life, reduces insulation strength and causes cavitation abrasion on hydraulic components; the vacuum system minimizes residual trace gas effectively.

• Solid Particle Removal: Filter all suspended mechanical impurities, abrasive particles and accumulated sludge inside oil. These contaminants lead to valve jamming, bearing wear and electrostatic breakdown of insulating oil; three-stage filtration reaches ultra-clean oil standard after treatment.

• Oil Regeneration Matching Functions: When connected with matched regeneration auxiliary device, the machine can realize acid removal, decolorization and chroma recovery of deteriorated oil, and significantly boost the dielectric strength of transformer insulating oil for power industry use.

Working Principle

Different liquid mediums own unique saturated vapor pressure values. At the same temperature, the saturated vapor pressure of water is far higher than that of mineral oil. When we pump out air inside the vacuum tank to lower internal pressure below the saturated vapor pressure of water, the water contained in oil will rapidly vaporize into water vapor and separate from the oil body completely.Driven by the suction force of the transfer pump, raw oil flows into the top of vacuum tank and sprays evenly onto multi-layer porous filling materials, splitting the oil stream into countless thin oil films. This design massively expands the contact area between oil and vacuum air, prolongs the retention time of oil in vacuum environment and maximizes the separation efficiency of water and gas.The purification performance is determined by vacuum level and oil temperature: lower vacuum degree and moderate heating temperature bring better dehydration effect without triggering oil oxidation. For hydraulic oil, we maintain medium vacuum level to drop residual water below 100ppm; for high-demand transformer insulating oil, deeper vacuum can reduce water content to 10ppm or lower. The vacuum separation process also removes all volatile pollutants mixed inside oil synchronously.

Technical Parameters

• Available Models: ZLYC-25, ZLYC-32, ZLYC-50, ZLYC-100, ZLYC-150, ZLYC-200

• Rated Flow Rate: 25~200 L/min

• Rated Working Pressure: 0.6 MPa

• Ultimate Vacuum Degree: ≤ -0.095 MPa

• Residual Water Content After Filtration: 5~30 ppm

• Residual Gas Content After Filtration: ≤ 0.2%

• Three-Stage Filtration Precision: Primary 100μm, Secondary 10/20μm, Tertiary 3/5μm

• Standard Power Supply: AC 380V, 3 Phase 50Hz

• Total Motor Power: 18kW ~ 135kW according to different models

• Machine Weight & Overall Dimension: Specific size and weight data of each model can be provided on request; we support customized 304 stainless steel tank, overseas special voltage and explosion-proof electric configuration.

Why Choose Our Company 

LEFILTER is a professional manufacturer specializing in filtration equipment with abundant R&D and manufacturing experience, and we deliver outstanding benefits to all global buyers. LEFILTER independently produces all ZLYC series vacuum oil purifiers, carrying out strict raw material inspection and full finished machine test before shipment, so every machine owns stable performance and long service life. All our products can obtain CE and ISO certifications to satisfy various overseas industrial standards. LEFILTER supports all kinds of personalized custom schemes, including OEM brand marking, 304 stainless steel tank upgrade, special power supply, explosion-proof electric system and intelligent PLC touch control panel to fit different local working conditions. LEFILTER keeps sufficient inventory of standard ZLYC models to realize quick delivery, and large quantity orders will get attractive wholesale discounts. LEFILTER owns a professional international after-sales team that offers full set of English operation manuals, remote video technical guidance and cost-effective supply of spare parts, helping you resolve all equipment operation and maintenance problems timely. As the direct factory, LEFILTER eliminates intermediate dealers, providing you with cost-competitive prices without sacrificing product quality, which makes us the reliable partner for global power project contractors, equipment distributors and industrial end users.

Frequently Asked Questions

Q1: What kinds of oil can LEFILTER ZLYC vacuum oil purifier handle?

A1: LEFILTER ZLYC series works perfectly for transformer insulating oil, turbine oil, hydraulic oil, lubricating oil, capacitor oil and compressor oil. It can complete both daily oil maintenance and waste oil regeneration for power plants, metallurgy and chemical factories.

Q2: Can LEFILTER provide customized ZLYC vacuum oil purifier for overseas markets?

A2: Yes. LEFILTER supports full customization, including 415V/60Hz special voltage, 304 stainless steel tank, explosion-proof electrical system and PLC touch control panel. We also accept OEM & ODM with your brand logo printed on machine and packages.

Q3: How many stages of filtration does the ZLYC vacuum oil purifier adopt? What’s the effect?

A3: LEFILTER ZLYC machine uses three-stage gradient filtration. The 100μm coarse filter protects oil pump, 10/20μm secondary filter and 3/5μm tertiary filter remove tiny particles step by step. Cooperated with vacuum dehydration & degassing system, it can eliminate water, air and sludge thoroughly.

Q4: What after-sales support can LEFILTER offer to global buyers?

A4: LEFILTER provides complete English operation manuals, remote video technical guidance, long-term low-cost spare parts supply and online fault troubleshooting. For bulk order clients, we can arrange overseas engineer on-site service under negotiation.

Q5: Are LEFILTER ZLYC vacuum oil purifiers certified for export?

A5: All LEFILTER ZLYC series machines pass strict factory test before shipment and can provide CE, ISO certificates to meet international industrial standards. Stable quality and factory-direct price help you avoid extra cost from middle dealers.

Q6: What structural styles are available for LEFILTER ZLYC vacuum oil purifier?

A6: LEFILTER supplies multiple styles to match different working scenarios, including mobile cart type with universal wheels, fixed type, fully enclosed dust-proof type and vehicle-mounted type. All styles adopt integrated frame with detachable oil sump to avoid oil leakage on site.

Q7: How long is the service life of filter elements for ZLYC oil purifier?

A7: The service life of filter elements depends on the pollution degree of raw oil. Under normal working conditions, the primary coarse filter element can be reused after cleaning, while secondary and tertiary glass fiber filter cartridges can work continuously for 3 to 8 months. LEFILTER can supply matching replacement filter elements at factory cost at any time.

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