2.2kW 220V 150kg Automatic Oil Purification Equipment

Compressed Air Press Oil Filter Machine 2.2kW 220V PP Plate 150kg Automatic Oil Purification Equipment

Product Overview

This automatic oil purification machine is a compact pressure filtration system designed to clarify and recycle industrial oils using polypropylene (PP) filter plates, a 2.2kW 220V drive set, and compressed‑air assistance for plate clamping, cake blowing, and automatic discharge. With an approximate 150kg skid weight, it is intended for workshops, small power stations, compressor rooms, hydraulic plants, transformer maintenance vans, food‑grade oil clarification, and batch oil recycling where space, single‑phase power, and easy operation are important.

The machine removes solid contaminants such as wear particles, carbon sludge, rust, scale, and filterable oxidation products from compressor lubricant, hydraulic oil, turbine lube oil, gear oil, insulating/transformer oil, cutting oil, and selected edible/biodiesel streams. Depending on the configured media and auxiliary modules, it can also support free‑water separation, heating, and polishing. A pure PP‑plate press performs mechanical filtration; if the application requires trace moisture removal, dielectric restoration, or varnish control, the press is used as the pre‑filtration stage before coalescing, vacuum dehydration, or activated‑clay/carbon polishing.

“Compressed air press” in this design means the filtration pressure can be supported by a 2.2kW 220V feed pump, while factory compressed air is used for automatic plate opening/closing, diaphragm squeezing or cake drying, pneumatic valves, and instrument control. If no plant air is available, the unit can be supplied with electro‑mechanical plate locking and an air‑free control option.

Working Principle

1. Pre‑straining:​ Contaminated oil is drawn from the dirty tank or machine sump through a coarse strainer, usually 50–200µm, to protect the pump from large debris.

2. Feed pumping:​ A 2.2kW 220V single‑phase motor drives a gear/lobe/centrifugal oil pump. For viscous lube oils a positive‑displacement gear pump is preferred; for low‑viscosity transformer/edible oil a centrifugal or lobe pump may be selected. The pump builds system pressure toward the PP plate chamber.

3. Heating (optional):​ An electric heater raises oil temperature to reduce viscosity, improve filtration rate, and assist free‑water separation. For PP plates, limit temperature to the plate/media rating, commonly up to 80–90°C for standard PP and up to about 95°C for high‑temperature PP; verify with the manufacturer.

4. PP plate pressure filtration:​ Oil enters the plate pack. Each PP chamber contains filter cloth, paper, mesh, or cartridge media. Solids are retained on the media and form a filter cake; clarified oil collects in the drainage channels and exits to the clean side. PP plates provide corrosion resistance, smooth surface, low extractables, and good chemical compatibility with most mineral, vegetable, and insulating oils within temperature limits.

5. Compressed‑air assistance:​ Plant air can clamp the plate pack, apply pneumatic squeezing/diaphragm pressure to compress the cake, or blow through the cake after filtration to reduce oil loss and shorten discharge. Air pressure is typically much lower than hydraulic clamping and is selected for safe, automatic operation.

6. Water and polishing (optional):​ Free water can be removed by a coalescing separator or vacuum stage after the press; fine polishing cartridges (1–5µm) or activated clay/carbon vessels can be added for varnish, acid, color, and odor control.

7. Automatic control:​ A PLC/HMI monitors inlet/outlet pressure, oil temperature, flow, tank level, plate position, and differential pressure. The system starts/stops by level or pressure, opens plates automatically when the cake is full or a cycle ends, alarms on overload/over‑temp/leakage, and can log cycle data via MODBUS/BMS.

Typical Specifications

Exact plate number, area, flow, dimensions, and power balance must be confirmed against oil type, viscosity curve, contaminant load, and target cleanliness.

Oil Contamination Basics

Industrial oil normally contains:

• Solid particles:​ wear debris, carbon from compressor/disel engines, rust, seal fragments, dust, filter fines. These cause abrasive wear, valve sticking, servo failure, and filter blockage.

• Free and dissolved water:​ from condensation, seal leakage, cooling‑water ingress, or steam. Water accelerates oxidation, reduces lubricity, causes emulsification, and lowers dielectric strength in transformer oil.

• Oxidation products and sludge:​ formed at high temperature; increase viscosity, form deposits, and plug filters.

• Varnish/soft contaminants:​ soluble and sub‑micron polar compounds that precipitate on hot surfaces; require adsorption or electrostatic treatment beyond simple straining.

• Acids and additives breakdown products:​ require chemical monitoring; severe cases need clay/carbon or reclamation, not only mechanical filtration.

A PP plate press mainly removes filterable solids and, with proper pre‑coat or cake structure, some slurry‑bound moisture. Free water is best removed by coalescing/centrifuge/vacuum; dissolved water and gases in insulating oil usually require vacuum dehydration and degassing.

Sizing And Throughput Method

Filter‑area‑based estimation:

Q_actual = Q_ref × A × F_viscosity × F_pressure × F_micron × F_solids

Where:

Q_actual = expected clean throughput, m³/h

Q_ref = reference throughput per m² under base conditions, approx. 2.0m³/h per m²

A = installed PP filtration area, m²

Base reference = oil viscosity 20cSt, pressure 0.30MPa, target 10µm, low solids (<0.1%)

F_viscosity = correction by kinematic viscosity at operating temperature

F_pressure = correction by operating pressure

F_micron = correction by target retention rating

F_solids = correction by suspended solids concentration

Illustrative factors:

• Viscosity at operating temperature: 10cSt ×1.25, 20cSt ×1.00, 32cSt ×0.75, 46cSt ×0.55, 68cSt ×0.40, 100cSt ×0.30, 220cSt ×0.18, 320cSt ×0.12.

• Pressure: 0.15MPa ×0.65, 0.30MPa ×1.00, 0.45MPa ×1.20, 0.60MPa ×1.40.

• Target micron: 50µm ×1.30, 25µm ×1.10, 10µm ×1.00, 5µm ×0.80, 1µm ×0.50.

• Solids loading: <0.1% ×1.00, 0.1–0.5% ×0.85, 0.5–1.0% ×0.70, 1–3% ×0.55, >3% ×0.40.

Pump hydraulic check:

Q_pump ≈ (P_motor × η) / ΔP

With P_motor in watts, ΔP in pascals, Q in m³/s. For a 2.2kW motor at 70% effective hydraulic efficiency and 0.30MPa differential:

Q ≈ 2200 × 0.70 / 300,000 ≈ 0.00513m³/s ≈ 18.5m³/h theoretical.

At 0.60MPa: ≈9.2m³/h theoretical.

Real oil pumps lose volume with viscosity, slip, and media resistance, so actual delivered flow is usually far lower than the hydraulic maximum; the PP plate area and cake growth become the practical limit.

Worked Example A — Screw compressor lube oil, VG32​

Oil recovered at 50°C, viscosity ≈20cSt. Target 10µm. Operating pressure 0.30MPa. Solids 0.2%. Installed PP area 1.5m².

F_visc=1.00, F_press=1.00, F_micron=1.00, F_solids≈0.85.

Q = 2.0 × 1.5 × 1.00 × 1.00 × 1.00 × 0.85 ≈ 2.55m³/h.

A 2.2kW 220V pump can easily supply this at low pressure, so the plate area governs. For batch recycling a 200L compressor sump, one press cycle takes roughly 200/2550 ≈0.08h ≈5min ideal; in practice allow 30–90min for heating, cake formation, and discharge.

Worked Example B — Hydraulic power unit, VG46​

Oil at 40°C, viscosity 46cSt. Target 5µm. Pressure 0.45MPa. Solids 0.3%. Area 2.0m².

F_visc=0.55, F_press=1.20, F_micron=0.80, F_solids=0.85.

Q = 2.0 × 2.0 × 0.55 × 1.20 × 0.80 × 0.85 ≈ 1.79m³/h.

If the same oil is heated to 60°C, VG46 viscosity falls to roughly 15–20cSt; using 18cSt factor ≈1.10 replaces viscosity factor: Q ≈ 2×2×1.10×1.20×0.80×0.85 ≈3.58m³/h. Heating almost doubles throughput for viscous hydraulic oil within PP temperature limits.

Worked Example C — Transformer/insulating oil pre‑filtration​

New‑ish insulating oil at 40°C, viscosity ≈8–10cSt. Target 1µm polishing after press. Pressure 0.30MPa. Solids 0.1%. Area 2.0m².

F_visc≈1.25, F_press=1.00, F_micron=0.50, F_solids=1.00.

Q = 2.0 × 2.0 × 1.25 × 1.00 × 0.50 × 1.00 ≈ 2.5m³/h through the press stage.

For final dielectric quality, add vacuum dehydration/degassing and 1µm polishing after the PP press; the 2.2kW/220V press alone clarifies solids but does not fully restore very low moisture/ gas levels.

Filtration Media And PP Plate Advantages

• PP plates:​ corrosion resistant to water, mineral oils, vegetable oils, mild alkalis/acids; lightweight; smooth surface for easy cake discharge; lower cost than stainless for many oils; electrically insulating and non‑sparking in standard form.

• Filter media:​ PP monofilament cloth for general lube/hydraulic; cellulose/PP paper for insulating oil and fine clarification; nylon/polyester for abrasion; stainless mesh support; pre‑coat diatomite/perlite for very fine or gelatinous sludges.

• Automatic media management:​ cloth washing, air blowing, plate‑shifting, and drip collection reduce labor and cross‑contamination.

• Chemical compatibility:​ PP is generally good for mineral lubricants, transformer oil, vegetable oils, and many water‑in‑oil emulsions, but may not suit strong oxidizers, some chlorinated solvents, aromatics at high concentration, or temperatures above the rated PP limit. Request a compatibility certificate for food, pharma, or aggressive process oils.

Purification Train Options

1. Basic clarification:​ dirty tank → strainer → 2.2kW pump → PP plate press → clean tank. Best for solids‑dominated lube/hydraulic oil.

2. Clarification + water separation:​ add heater and coalescing separator before/after the press for free water in hydraulic and compressor oil.

3. Compressor lube recycling:​ sump → pre‑strainer → heater → PP press → coalescing water trap → 5µm polishing → return. Restores cleanliness and removes bulk water; send severely oxidized oil for reclamation.

4. Transformer/insulating oil:​ pre‑strainer → PP press for solids → vacuum dehydration/degassing → 1–5µm polishing → dielectric testing. The 2.2kW 220V PP unit is the solids pre‑treatment stage in a mobile van.

5. Edible/biodiesel clarification:​ food‑grade PP plates, food‑grade cloth/paper, heated feed, automatic cake discharge; add activated carbon vessel for color/odor if required.

ISO Cleanliness And Quality Targets

Use ISO 4406 particle counts for hydraulic/lube systems and application standards for insulating oil.

ISO 4406 is reported as particle count per 1mL at three sizes, e.g., 18/16/13: ≥4µm, ≥6µm, ≥14µm sizes. Lower numbers mean cleaner oil.

Pressure, Compressed Air, And Electrical Notes

• 2.2kW 220V single phase:​ suitable for small workshops and service vans without three‑phase power. Confirm voltage tolerance (208/220/230V), frequency, starter type, and cable size. At 220V, full‑load current is roughly 10–14A for 2.2kW depending on power factor and efficiency; allow starter/breaker margin.

• Compressed air assist:​ if plate clamping and cake blow use plant air, provide 4–7barg, filtered and dew‑point appropriate to avoid contaminating food/pharma oil. Pneumatic consumption depends on cylinder volume, cycle frequency, and blow time; request kWh/CFM equivalent from the vendor.

• Safety:​ over‑pressure relief on pump/discharge, temperature cut‑out for heaters, emergency stop, plate‑clamp guards, electrical IP rating for oily/wet areas, and explosion‑proof option for solvent‑bearing or flammable vapor streams.

Installation Recommendations

• Place the machine on a level base with enough space for plate opening, cake collection, tank removal, and maintenance; a 150kg class skid is usually movable by pallet truck but confirm dimensions and center of gravity when full of oil.

• Connect dirty‑oil inlet via a rigid or armored hose with isolation valve and strainer. Return clean oil through a dedicated polished outlet; avoid mixing with untreated sump.

• For viscous oils, install the heater and circulate before pressing; do not start high‑pressure filtration with cold, high‑viscosity oil that exceeds pump and PP pressure limits.

• Provide ventilation for heater and motor heat; keep electrical panels away from oil spray.

• If using compressed air, install a point‑of‑use filter/regulator/lubricator or non‑lubricated FRL according to pneumatic component requirements.

• For transformer oil, dedicate hoses and plates to insulating service; do not use the same cloth/media as hydraulic/compressor oil without full decontamination.

• Calibrate pressure, temperature, flow, and DP sensors before commissioning; establish baseline cleanliness by bottle sampling and laboratory count.

Maintenance Program

• Daily/automatic: pressure differential, oil temperature, flow, tank levels, air pressure if pneumatic, alarm status, cake fullness indication.

• Weekly: inspect PP plates for cracks/leakage, cloth/media condition, pump seals, valves, drip tray, and electrical connections.

• Per batch/cycle: remove cake, inspect media blinding, wash cloth if automated, check pre‑strainer, record throughput and final cleanliness.

• Monthly: check pump performance and motor current, heater contacts, PLC/HMI logs, pneumatic cylinders/air leaks, relief valve function.

• Quarterly: verify micron rating with challenge test if critical, calibrate sensors, review oil sample trend, inspect frame/coatings, test automatic plate opening/discharge.

• Annual: full service, replace worn cloth/paper/seals, inspect PP plate flatness, verify pressure relief and electrical safety, review media consumption and spare parts.

Common Problems And Corrective Actions

Application Recommendations

Procurement Specification Checklist

Request written values, not marketing terms.

• Oil type and composition: mineral/hydraulic/compressor/turbine/transformer/vegetable/biodiesel; additive package; chemical contaminants.

• Viscosity‑temperature curve: kinematic viscosity at 20/40/60/80°C; max operating temperature.

• Contaminants: particle size distribution, solids %, water content free/dissolved, oxidation/acid/varnish, color/odor.

• Target cleanliness: ISO 4406 code for hydraulics; moisture ppm and dielectric kV for transformer; food/pharma specifications for edible.

• Throughput: continuous m³/h or batch volume/time; number of shifts; future expansion.

• PP plates: area, plate size/material, chamber number, max pressure/temperature, media type, cake volume, discharge method.

• Drive: 2.2kW 220V 1φ confirmation; pump type, flow‑pressure curve, seal material; three‑phase option if site allows.

• Compressed air: availability bar/CFM, pneumatic functions, filter/regulator, air‑free alternative if no plant air.

• Options: heater kW, tanks volume/material, coalescer, vacuum degasser, carbon/clay vessel, polishing cartridges, pre‑coat system, stainless contact parts, explosion‑proof electrical.

• Controls: PLC/HMI, sensors, automatic plate open/close, cake blow, cloth wash, alarms, data export, MODBUS/BMS.

• Compliance: pressure‑equipment rules, electrical IP/IEC/UL, food‑grade certificates for edible oil, material compatibility, factory test/report.

• Utilities and footprint: 220V supply, air supply, drainage, weight 150kg confirmation with options, dimensions, rigging, spare media and parts list.

Frequently Asked Questions

Q1: Can a 2.2kW 220V machine handle industrial oil volumes?​

For a small automatic PP press, the motor/pump can move several cubic meters per hour at low viscosity, but actual filtration rate is limited by plate area, micron rating, viscosity, and solids. A 0.5–3m² 150kg class unit is best for batch recycling of compressor/hydraulic sumps, small transformer batches, and pilot edible‑oil clarification rather than continuous large‑plant throughput.

Q2: What does “compressed air press” mean if it also has a 2.2kW electric pump?​

The electric pump provides main filtration flow; compressed air can clamp the PP plates, blow the cake dry, operate pneumatic valves, and assist automatic discharge. If no compressed air is available, request an all‑electric clamp and discharge version.

Q3: Will PP plates withstand hot oil?​

Standard PP is typically rated up to about 80°C, high‑temperature PP up to about 95°C; above that use stainless or special polymer plates. Always confirm plate grade, gasket/material, and filter‑media temperature limits before heating.

Q4: Does this machine remove water?​

A pressure PP press removes filterable solids and, with pre‑coat/cake structure, some entrained free water, but it is not a complete dehydrator. For hydraulic/compressor oil add a coalescing separator; for transformer/insulating oil add vacuum dehydration and degassing after the press.

Q5: What micron rating should I choose?​

Use coarser media for high flow and heavy solids—25–50µm pre‑strainer, 10–25µm PP press for general lube/hydraulic; 5–10µm for precision hydraulics; 1–5µm for insulating‑oil pre‑clarification before vacuum/polish. Finer micron reduces flow and increases cake frequency.

Q6: Is it suitable for food or pharmaceutical oil?​

Only with food‑grade PP plates, certified filter cloth/paper, sanitary finishes, dedicated hoses, and validated cleaning. For edible clarification state food‑contact requirements; for pharma use validated filtration and material certificates.

Q7: How often are plates/media serviced?​

By cycle condition. In heavy‑sludge compressor or hydraulic service, cloths may need cleaning or replacement every few batches; in light transformer pre‑filtration, media lasts much longer. Use differential pressure and outlet clarity rather than fixed calendar only.

Q8: Can it purify transformer oil to re‑energize a transformer?​

The PP press can clarify solids, but dielectric restoration usually requires vacuum dehydration/degassing and fine polishing plus oil testing for breakdown voltage, moisture, gas, and particle count. Use the press as pretreatment in a complete transformer oil purification skid.

Final Selection Recommendation

Specify this 2.2kW 220V PP‑plate automatic oil filter by actual oil type, viscosity at operating temperature, contaminant type and concentration, required ISO 4406 or dielectric target, batch/continuous volume, and available utilities rather than by motor size alone. For compressor lube and hydraulic recycling, choose a 0.5–3m² PP chamber/frame pack with 10–25µm base media, optional heating to reduce viscosity within