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Ultra-precision Oil Purifier
1 Product Overview
Ultra-precision Oil Purifier is a mobile submicron pressure deep filtration equipment developed for high-end precision hydraulic and lubrication systems.Contaminated oil is delivered by low-pulse gear pump and sequentially passes inlet strainer, pre-filter and multi-stage ultra-precision polishing modules. Multi-layer gradient glass fiber media captures submicron particles, soft gum and carbon black which ordinary filter equipment cannot intercept, steadily maintaining oil at ultra-high cleanliness level.
Classification Reminder
Ultra-precision Oil Purifier: submicron high precision for NAS3～6; for precision servo & wind power, routine cleanliness maintenance, not for heavy sludge overhaul flushing.
PFC Series Oil Purifier: standard precision filter cart for NAS5～8, general industrial maintenance.
High Solid Content Oil Purifier: heavy-duty high dirt-holding model for high sludge & overhaul flushing.
Coalescence Dehydration Oil Purifier: coalescing separation unit for emulsion breaking, water & particle removal.
Diaphragm Pump Filter Cart: AODD driven intrinsically safe filter without electric motor.
Vacuum Oil Purifier: vacuum type for water & gas removal via evaporation.
2 Main Structural Composition
Mobile Base AssemblyPainted carbon steel frame, anti-leak drip tray, silent lockable swivel casters and push handle.
Fluid Transfer UnitLow-pulse silent gear pump, 3-phase motor (explosion-proof optional).
Multi-Stage Ultra-precision Filtration SystemInlet metal strainer, pre-filter vessel, multi-group serial/parallel polishing vessels, high-efficiency composite glass fiber elements.
Monitoring SystemInlet & outlet pressure gauges, differential pressure audible-visual alarm.
Safety Protection ComponentsRelief safety valve, motor overload protector, built-in filter bypass valve.
Pipe AccessoriesOil-resistant suction/discharge hoses, quick couplings, vent valve and outlet flow diffuser.
3 Working Principle
Primary Coarse Interception & Pump Protection StageRaw oil passes inlet metal strainer to capture large debris and prevent hard particles from damaging gear pump and downstream fine elements.
Pre-Filtration Buffer StageOil enters pre-filter unit to trap medium-sized contaminants, reduce load and extend service life of ultra-precision main elements.
Submicron Ultra-precision Polishing StageOil flows into serial polishing vessels. Gradient-density composite media (loose outside, dense inside) forms progressive interception channels to capture micron and submicron particles, gum and carbon black layer by layer. Clean oil discharges for tank circulation.Contaminant accumulation raises differential pressure and triggers alarm at preset threshold. Built-in bypass opens automatically to avoid flow interruption when elements are severely clogged.
Note: Standard version removes solid particles only. Adsorption or pre-coalescing module can be added for emulsified & free water removal.
4 Basic Technical Parameters
Standard Flow Rates: 16 / 25 / 50 / 100 / 150 L/minFilter Efficiency: βₓ ≥ 2000Output Cleanliness: NAS Class 3～6Applicable Viscosity: standard ≤120 cSt; high-viscosity customized ≤200 cStOperating Temperature: 5～80℃Max Working Pressure: ≤0.8 MPaPower Supply: AC380V 3-phase 50Hz (explosion-proof control optional)Element replacement differential pressure: 0.22～0.28 MPaApplicable Media: servo hydraulic oil, turbine oil, gear oil, lube oil, transformer oil
5 Core Product Advantages
Submicron deep filtration stably achieves NAS3～6 ultra-high cleanliness, meeting strict oil standards for wind power and precision servo equipment.
Low-pulse silent pump provides stable flow without stirring tank sediment and causing secondary contamination.
Multi-stage progressive filtration layout with balanced dirt loading extends element service cycle and cuts maintenance frequency.
Mobile design supports offline bypass circulation and new oil pre-filtration in one unit.
Complete multi-level electrical and hydraulic safety protection enables stable long-term continuous operation.
Compact structure and low running noise, suitable for non-stop operation in workshops and equipment rooms.
Expandable trace water & acid removal adsorption modules to inhibit varnish and sludge generation.
Sufficient domestically compatible high-precision elements, greatly reducing long-term spare parts cost versus imported equivalent units.
6 Installation, Commissioning & Maintenance Specification
Place unit on flat ground and lock casters. Keep suction hose away from tank bottom sediment.Vent all air before initial startup and verify stable pressure during no-load trial run.Monitor differential pressure continuously. Replace full set of polishing elements immediately after alarm trigger; avoid long-term bypass operation which reduces cleanliness.Cut power and fully depressurize before element replacement. Clean sealing surface and inspect O-rings.Thoroughly flush piping and vessel before switching different oil grades to prevent cross-contamination.Drain residual oil and clean internal sediment before long shutdown.
7 Common Faults & Solutions
Output oil fails to reach target NAS cleanlinessCauses: damaged elements; flow exceeding rated capacity; high inlet water content; insufficient element precisionSolutions: install brand-new polishing elements; reduce flow rate; add water adsorption module; upgrade higher precision cartridges
Fast differential pressure riseCauses: severe initial system contamination; no upstream pre-filter; oil contains abundant soft gumSolutions: increase circulation frequency at early stage; add external pre-filter; match adsorption elements periodically
Insufficient pump flow & weak suctionCauses: air leakage on suction line; clogged inlet strainer; low temperature raising viscositySolutions: tighten hose connections; clean suction strainer; moderately preheat oil
Oil leakage at flanges and jointsCauses: aged seals; uneven bolt torque; pump vibration transferSolutions: install new oil-resistant gaskets; tighten bolts evenly diagonally; optimize hose layout for vibration reduction
DP alarm malfunctionCauses: blocked impulse sampling tubing; loose wiringSolutions: purge sampling pipeline; inspect terminal connections
8 Standard Supply List & Optional Accessories
Standard Supply List
Mobile base frame, low-pulse gear pump & motor assembly, inlet strainer assembly, multi-stage filter housings, ultra-precision composite filter elements, relief safety valve, DP audible-visual alarm unit, pressure gauges, suction & discharge oil-resistant hoses, complete sealing set, flow direction nameplate, operation manual.
Optional Accessories
Explosion-proof motor & control cabinet, magnetic adsorption elements, trace water / acid removal adsorption modules, PLC control system, remote DP transmitter, sampling valve, extended suction/discharge hoses, quick disconnect couplings, FKM sealing kit, spare filter element package.
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