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Diaphragm Pump Filter Cart
1 Product Overview
Diaphragm Pump Filter Cart is a portable integrated filtration system combining air-operated double diaphragm pump as transfer power, mobile trolley as carrier and filter housing as purification unit.Compressed air drives AODD pump to self-prime raw liquid and feed into filter housing. Solid contaminants are trapped by filter bags or cartridges, clean liquid is delivered to target vessel. The whole unit can be freely moved between work stations, ideal for non-fixed pipeline, flammable & explosive media and batch intermittent production.
Classification Note:Differentiated from electric oil filter carts: this unit adopts pneumatic AODD pump with intrinsic explosion protection, mainly for chemical solvents and corrosive liquids; electric filter carts are mostly applied for offline purification of lubricating oil and hydraulic oil.
2 Main Structural Composition
Mobile Trolley BasePainted carbon steel / stainless steel frame, lockable casters, drip tray and push handle.
Air Operated Diaphragm Pump (AODD)1”/1.5”/2” size optional, multiple housing & diaphragm materials for corrosive media.
Filter Housing AssemblyBag filter or cartridge filter, quick opening flange, support basket and sealing set.
Air Preparation UnitAir filter regulator, inlet ball valve.
Monitoring ComponentsInlet & outlet pressure gauges, sampling port (optional).
Pipe AccessoriesSolvent resistant flexible hoses and quick clamps.
3 Working Principle
Suction & Transfer StageConnect 0.4～0.6MPa compressed air. Reciprocating diaphragm generates vacuum to draw raw liquid from tank and push fluid into filter housing.
Solid-Liquid Filtration StageLiquid flows inward through filter bag/cartridge; solid particles and suspended matter are retained on media surface. Clean filtrate flows out to finished tank or circulation loop. Rising differential pressure indicates saturated filter media.
Maintenance OperationShut off air supply and depressurize, open quick clamp cover to replace consumables, reassemble and restart. No power cut required, suitable for continuous shift operation inside explosion-proof workshops.
4 Basic Technical Parameters
Air supply: 0.4～0.6 MPa clean dry compressed airPump size: 1 inch / 1.5 inch / 2 inch AODD pumpFilter type: bag filter / cartridge filterFiltration rating: 0.5 μm ~ 200 μmLiquid viscosity: ≤50,000 cpsHousing material: SUS304, SUS316L, PP, PVDFPump wetted material: aluminum, cast iron, PP, PTFE diaphragmOperating temperature: 5～80℃ (depends on material selection)Flow range: 1～40 m³/hInstallation: mobile trolley with lockable castersInitial pressure drop: ≤0.02 MPa
5 Core Product Advantages
Air-driven design with intrinsic explosion safety for paint, solvent and hazardous chemicals.
Integrated movable unit, one cart shared among multiple stations to reduce equipment investment.
AODD pump supports self-priming & dry-running, tolerant of fluctuating liquid level.
Quick-open filter housing for fast media replacement and minimum downtime.
Wide material selection compatible with neutral liquid, weak acid, alkali and organic solvents.
Flexible vibration-damping hoses reduce pipeline fatigue and leakage risk.
Supports single-pass filtration or closed-loop recirculation purification.
No permanent piping or civil construction required; fast commissioning for production line revamp.
6 Installation, Commissioning & Maintenance Specification
Place on flat ground and lock casters. Supply clean dry compressed air and regulate pressure within rated range.Immerse suction and discharge hoses into liquid to avoid air ingestion. Start at low flow and gradually increase throughput.Monitor pressure gauge regularly. Replace filter bag/cartridge when DP reaches 0.08～0.12MPa; avoid long-term overpressure drop operation.Depressurize fully before opening housing to prevent liquid splashing.Thoroughly flush housing and piping before switching different materials to avoid cross-contamination.Drain residual liquid and clean pump & filter before long shutdown to prevent crystallization and scaling.
7 Common Faults & Solutions
Low flow rate & insufficient suctionCauses: insufficient air pressure; air leakage on suction hose; blocked filter media; clogged inlet strainerSolutions: adjust air pressure; retighten hose clamps; replace filter bag; clear suction pipeline debris
Rapid DP rise, frequent media replacementCauses: high impurity concentration in feed; lack of upstream coarse filtrationSolutions: install pre-filter; shorten element service interval
Leakage at pipe jointsCauses: aged hose; loose clamps; vibration fatigue from diaphragm pumpSolutions: replace media-compatible hose; retighten clamps; optimize hose layout
Unstable pump operation, abnormal shudderingCauses: water contained in compressed air; worn air valve; ruptured diaphragmSolutions: add air dryer; overhaul pump air valve; replace diaphragm
Stiff trolley movement, broken caster lockCauses: material buildup on wheel shaft; jammed brake mechanismSolutions: clean casters; clear deposits on brake parts
8 Standard Supply List & Optional Accessories
Standard Supply List
Mobile trolley base, AODD diaphragm pump, filter housing, air filter regulator, inlet & outlet pressure gauges, transfer hoses, complete sealing set, flow direction nameplate, operation manual.
Optional Accessories
Bypass valve manifold, sampling valve, quick disconnect couplings, extended suction/discharge hoses, PP/PVDF corrosion resistant package, dual-series filter housing, spare filter bag & cartridge kit。
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