Choosing the right industrial pump is the single biggest factor in whether a fluid-handling system runs reliably for ten years or starts giving you grief in ten months. The wrong pump type will cavitate, run hot, eat seals, and burn motors no matter how well the rest of the system is built. This guide walks through the two main pump families (centrifugal and positive displacement), how to pick between them, what specifications matter, and how AIMS supports lubrication, fuel, chemical and water transfer applications across Australian industry. For deep-dives we link out to our specialist guides on diaphragm pumps, fuel transfer pumps, and flow meters.
Pump Type Selection by Application — Quick Reference
Use this as a first-cut. The detailed sections below cover why, and where each shines or fails.
| Application | Recommended pump category | Key consideration |
|---|---|---|
| Clean water transfer, irrigation, dewatering | Centrifugal (end-suction or submersible) | NPSH margin, dry-run protection |
| Diesel, petrol, AdBlue, fuel oil transfer | Gear or vane (PD), or diaphragm | Hazardous area rating, seal compatibility |
| Oil, gear oil, hydraulic oil from drums | Rotary gear or vane (PD) | Viscosity range, drum-mount fit |
| Grease transfer from 20L pails or 205L drums | Air-operated piston (PD) | Pressure ratio, follower plate, NLGI grade |
| Acids, caustics, solvents | AODD diaphragm or magnetic-drive centrifugal | Wetted material compatibility, sealless if possible |
| Slurry, sludge, mine tailings, abrasive solids | AODD diaphragm or heavy-duty centrifugal (rubber-lined) | Solids size, wear life, replaceable wetted parts |
| Food, dairy, sanitary process | Lobe, peristaltic, or sanitary centrifugal | 3-A sanitary, Tri-Clamp fittings, CIP-ready |
| Viscous fluids (honey, paint, syrups, heavy oils) | Gear, lobe, screw, or progressive cavity (PD) | Viscosity at operating temperature, low shear if required |
| Metering chemicals into a process | Diaphragm metering or peristaltic (PD) | Repeatability, turn-down ratio |
| High-pressure cleaning, hydrostatic test | Reciprocating plunger or piston (PD) | Inlet pressure, pulsation dampener |
| Sump, basement, stormwater | Submersible centrifugal | Float switch, solids handling |
| Workshop coolant, machine tool | Centrifugal (immersion) | Particulate filtration, level control |
Pump Categories — Centrifugal vs Positive Displacement
Every industrial pump sits in one of two camps. Get this distinction right and most of your selection problems go away.
Centrifugal pumps (kinetic)
A rotating impeller flings fluid outward by centrifugal force. Flow rate depends on the system pressure — when you close the discharge valve, flow drops to zero but pressure rises to a fixed maximum (the shut-off head). Centrifugal pumps are non-positive: they cannot generate more pressure than their impeller speed and diameter allow.
Best for: high flow, low-to-moderate head, thin fluids (water, light oils, dilute chemicals).
Avoid for: viscous fluids over about 200–300 cP, fluids that can't tolerate shear, or applications where a precise dose is needed.
Positive displacement pumps
A fixed volume of fluid is trapped and pushed out with every cycle of the pumping element (gear, vane, lobe, diaphragm, piston). Flow rate is independent of discharge pressure — if you close the discharge valve, the pump keeps trying to push, and something will give (pressure relief valve, hose, pump body, motor).
Best for: viscous fluids, accurate metering, high head with modest flow, suction lift, self-priming applications.
Avoid for: high-flow water transfer where centrifugal is cheaper and simpler; situations where the system can dead-head and you haven't fitted a relief valve.
Warning: Every positive displacement pump needs a pressure relief path. A blocked discharge with no relief is the textbook way to destroy the pump, the motor, or both. Fit a relief valve back to suction or to a safe location, set below the weakest component's rated pressure.
Centrifugal Pumps in Detail
The workhorse of water, light chemical, and HVAC duties. Simple, cheap to maintain, parts everywhere.
How they work
Fluid enters at the eye of a rotating impeller and is flung outward into a volute (the snail-shell casing) which converts velocity to pressure. End-suction is the most common configuration — fluid enters axially and leaves radially. Multi-stage centrifugals stack impellers in series to build head; common in boiler feed and high-rise water supply.
Where centrifugals shine
- Clean water at 20–500 L/min and 5–50 m head
- Cooling water and chilled water loops
- Irrigation, dewatering, garden and pool supply
- Light chemical transfer where wetted materials match the fluid
- Submersible duties — sump, stormwater, borehole
Where centrifugals fail
- Cavitation — the number-one pump killer. Pressure at the impeller eye drops below the fluid's vapour pressure, vapour bubbles form and collapse on the impeller, eating it from the leading edge inward. Sounds like gravel rattling inside the pump. Causes: insufficient NPSH available, clogged suction strainer, suction lift too high, fluid too hot, or pump running too far right of its best efficiency point (BEP).
- Dry running — centrifugals depend on fluid to cool the mechanical seal and lubricate the wear rings. Run dry for a few minutes and you'll cook the seal. Fit a low-level switch or run-dry-safe seal arrangement.
- Viscous fluids — viscosity drops flow and head and spikes power draw. Above about 150–200 cP, switch to positive displacement.
- Air entrainment — centrifugals are not self-priming as standard. Air in the suction line breaks prime.
NPSH — the spec that catches most buyers out
Net Positive Suction Head Required (NPSHr) is published by the pump maker for each impeller and flow point. Net Positive Suction Head Available (NPSHa) is what your installation actually delivers — atmospheric pressure plus static head minus friction losses minus vapour pressure. NPSHa must exceed NPSHr by at least 0.5–1.0 m (more for hot or volatile fluids) or the pump cavitates. If you're pumping warm or volatile fluid, calculate NPSHa carefully — don't assume.
Positive Displacement Pumps in Detail
Eight common PD types, each with a sweet spot.
Gear pumps
Two intermeshing gears trap fluid between teeth and the casing wall. Smooth, near-constant flow with very low pulsation. External-gear types handle moderate viscosities (oils, fuels, light syrups); internal-gear handles higher viscosity (cold heavy oil, polymer). Tight clearances mean they don't tolerate solids well. Common in hydraulic power packs, fuel dispensing and lubrication systems. The Macnaught hand-operated and battery oil pumps used in workshops are gear-type.
Vane pumps
Sliding vanes ride in slots in a rotor, sweeping fluid through a cam-shaped chamber. Self-compensating wear — the vanes ride out as they wear, maintaining seal. Good for fuels, solvents and clean thin oils. Vulnerable to abrasives.
Screw pumps
One, two or three intermeshing screws move fluid axially. Very low pulsation, can handle high pressures, run quiet. Mono-screw (progressive cavity) tolerates solids and high viscosity — used for sewage, food slurries, polymer dosing.
Lobe pumps
Two non-contacting lobes timed by external gears. Low shear, gentle on fragile fluids (yoghurt, fruit pulp, cell cultures), sanitary-friendly (clean-in-place, 3-A compliant variants). Higher cost but the standard for hygienic process work.
Peristaltic (hose) pumps
A rotor squeezes a flexible hose against the casing. Only the hose contacts the fluid — nothing else to corrode, contaminate or seal. Ideal for aggressive chemicals, abrasive slurries, food, and any duty where contamination is unacceptable. Hose is the wear item; cost-per-cycle is the planning metric.
Diaphragm pumps
A flexing diaphragm displaces fluid in and out of a chamber. Air-operated double-diaphragm (AODD) is the workhorse for chemical transfer, dewatering, slurry and viscous fluid duties — see our dedicated diaphragm pump guide for AODD selection, materials, troubleshooting and brand context.
Piston pumps
Reciprocating pistons in cylinders, similar to a car engine in reverse. High pressure capability — common in hydrostatic test rigs, high-pressure cleaning, paint spraying. Pulsation is significant; a dampener is usually required on the discharge.
Plunger pumps
Like piston pumps but the plunger seals against a stationary packing or seal rather than rings on the plunger itself. Better for very high pressure (200+ bar) and abrasive fluids. Standard for high-pressure water blasting, hydrostatic testing of pipework, and reverse-osmosis feed.
Air-operated piston pumps for lubricants
The standard way to move grease and high-viscosity oils out of 20L pails and 205L drums. Compressed air drives a reciprocating piston with a high pressure ratio (commonly 50:1 for grease, 5:1 to 8:1 for oil). Used with a follower plate on grease to prevent air pockets. AIMS sells Macnaught, Alemlube and Retracta units for this duty.
Selection Criteria — Specs That Actually Matter
Flow rate
Measured in litres per minute (L/min) or cubic metres per hour (m³/h). 1 m³/h = 16.67 L/min. Pick the operating flow based on the process need — not the pump's headline rating. The pump's curve will tell you what flow you actually get at your system head.
Total dynamic head (TDH)
The work the pump has to do, expressed in metres of fluid column. TDH = static lift + friction losses through pipes, fittings and valves + pressure required at the discharge point + velocity head. Friction losses depend on pipe internal diameter, length, fittings and flow velocity — use a Hazen-Williams or Darcy chart, or your pump supplier's sizing software. Warning: systems are almost always undersized on pipe ID. Doubling pipe length doubles friction loss; halving pipe diameter increases friction loss roughly 32x for the same flow.
NPSH available
Already covered for centrifugals above. For PD pumps, suction conditions matter too — most PD pumps can lift 5–7 m of water (less for warm or volatile fluids), but check the manufacturer's data.
Viscosity
Centipoise (cP) at the operating temperature, not at 20°C. Heavy oils thin dramatically when warmed; gear oils that are 800 cP at 20°C might be 80 cP at 80°C. Get the viscosity at actual operating temperature before sizing.
Temperature
Affects viscosity, NPSH, seal compatibility, and pump material limits. Above about 80°C most standard nitrile (NBR) seals start degrading; switch to Viton or EPDM as appropriate. Above 120°C consider stainless steel construction and specialist sealing.
Solids content
Particle size and concentration. Above about 1–2% solids, screw or peristaltic; for abrasives, rubber-lined centrifugal or AODD with abrasion-resistant elastomers. For settling solids, fit the pump below the source and keep flow above the carrying velocity.
Duty cycle
Continuous (S1) vs intermittent (S3). Air-operated pumps tolerate stop-start indefinitely. Electric pumps need motor sizing to match — frequent starts will burn out a motor rated for continuous duty.
Worked example — transferring oil from a drum
Application: transfer 50 L/min of SAE 30 motor oil at 30°C from a 205L drum to a small holding tank 5 m above the drum, through 6 m of 25mm ID hose. Viscosity at 30°C ≈ 250 cP.
- Pump category: centrifugal is out (too viscous). PD gear or vane. Air-operated piston with 5:1 ratio also workable.
- Flow: 50 L/min — well within Macnaught and Alemlube drum pump ranges.
- Head: 5 m static + ~2 m friction loss = ~7 m TDH. Modest.
- Seals: NBR (Buna-N) is fine for mineral oil at 30°C.
- Practical choice: Macnaught lever drum pump for occasional use, electric or air-operated for regular duty.
Materials and Seals
Wetted materials
| Material | Best for | Avoid for |
|---|---|---|
| Cast iron | Water, oil, light hydrocarbon | Acids, seawater, corrosive chemicals |
| Bronze | Seawater, brackish water, mild solutions | Strong acids, ammonia (causes stress corrosion) |
| Stainless 304 | Mild acids, food contact, soft water | Chlorides above ~50 ppm (pitting) |
| Stainless 316 | Chlorides, marine, most food and pharma | Strong reducing acids, hot concentrated chlorides |
| Super duplex (2507) | Hot seawater, high-chloride brines | Carbon steel pipework downstream — galvanic risk |
| PVC / CPVC | Acids, caustics, ambient chemicals | Solvents (PVC), high temperature, mechanical impact |
| Polypropylene | Acids, alkalis, salt solutions | Strong oxidisers, aromatic solvents |
| PTFE / PFA | Almost anything chemical at moderate temp | High pressure unless reinforced |
Always check the manufacturer's compatibility chart against the actual fluid, concentration and temperature. Concentration matters — dilute sulphuric is friendly to most metals, concentrated is not.
Seal types
- Mechanical seal — two flat faces (often carbon vs ceramic or silicon carbide) pressed together by springs. Standard for centrifugals. Cannot run dry. Common failure mode is dry running, abrasive wear, or chemical attack on the elastomer secondary seal.
- Gland packing — braided rope packed into a stuffing box, compressed against the shaft. Always leaks a controlled amount (cooling/lubrication). Cheap, robust, repairable in the field — common on water and slurry duties.
- Magnetic drive (sealless) — no shaft penetration of the casing; the impeller is driven by magnetic coupling through the casing wall. Zero leakage, no seal to fail. Used for hazardous, expensive, or environmentally sensitive fluids. Cannot run dry (the bearings inside are fluid-lubricated). More expensive upfront.
- Diaphragm / hose — the diaphragm or hose IS the seal. No dynamic seal at all. Standard for chemical transfer and food/pharma.
Application-Specific Selection
Lubrication transfer (oil, grease)
This is where AIMS sells most pumps. Workshops moving oil, grease, gear oil from drums and pails to vehicles or machinery. Standard kit: drum-mount pump body, suction tube sized to drum, control handle or meter, delivery hose, control gun.
- Macnaught — Australian-owned manufacturer (Sydney). Manual lever drum pumps, air-operated, electric and battery (BOP) options. See Macnaught BOP battery pumps for the battery-electric range that's gaining traction in mobile workshops and fleet maintenance.
- Alemlube — full lubrication-system supplier including pumps, reels, meters, control valves.
- Retracta — hose reels (often paired with the pump on the wall above the drum). See why the Macnaught Retracta Poly Reel is a fleet workshop favourite.
Browse: oil equipment, grease equipment, grease pumps, Macnaught, Alemlube, Retracta.
Fuel transfer (diesel, petrol, AdBlue)
Drum and IBC transfer of diesel, petrol, kerosene and AdBlue is its own discipline — hazardous area considerations, specific seal compatibility (especially AdBlue, which attacks brass and bronze), and metering/dispensing accuracy requirements. We've split this into a dedicated guide: see Fuel Transfer Pumps: 12V, 240V & Selection Guide. For bulk storage planning, Diesel Fuel Storage in Australia covers tank selection, bunding, and AS 1940 compliance considerations. [VERIFY: AS 1940 reference — that's the storage and handling of flammable and combustible liquids standard, but PIG to confirm currency and exact clause if referenced specifically in body in future iterations.]
Browse: fuel equipment.
Chemical handling
Acids, caustics, solvents, oxidisers. Three rules:
- Material compatibility is non-negotiable — check every wetted part against the actual fluid at actual concentration and temperature. A pump rated for sulphuric is not automatically rated for hot concentrated nitric.
- Containment is non-negotiable. Sealless (magnetic drive) or diaphragm preferred. If a mechanical seal is used, fit a leak detection or double-seal arrangement.
- Operator PPE is non-negotiable — chemical-resistant gloves, goggles, apron, eye-wash and shower within reach.
Browse: chemical pumps, diaphragm pumps.
Water transfer and dewatering
Borehole, irrigation, stormwater, construction site dewatering, pool filling, firefighting reserve top-up. Centrifugal is almost always the right answer. Submersible for sumps and pits; surface-mounted self-priming centrifugal for dewatering with suction lift.
Key questions: is the water clean, dirty, or solids-laden? What's the static lift and pipe run? Is dry-run protection needed? Continuous duty (irrigation) or intermittent (sump)?
Food and sanitary process
3-A sanitary standards govern construction — internal surface finish (Ra ≤ 0.8 µm typical), Tri-Clamp fittings, no dead-legs, clean-in-place (CIP) compatibility. Lobe and peristaltic pumps dominate. AIMS doesn't currently stock dedicated 3-A sanitary pump ranges — contact our team for sourcing if this is your duty. [VERIFY: AIMS sanitary pump stock position — Sam to confirm.]
Mining slurry and abrasives
Tailings, mill discharge, dewatering with solids. Heavy-duty centrifugals with replaceable rubber-lined wet ends or AODD diaphragm pumps with abrasion-resistant elastomers (Santoprene, Hytrel) are the two standard answers. Pilbara mines and Bowen Basin coal washeries run thousands of these. Wear life is measured in hours-of-pumping per unit of solids throughput.
High-pressure cleaning and hydrostatic testing
Plunger or piston PD pumps. 80–500 bar is typical for industrial cleaning, up to ~700 bar for water blasting. Pulsation dampener on the discharge is essential to protect the pump and downstream fittings.
Common Failure Modes
Cavitation
Symptoms: rattling/gravel noise, drop in flow, pitting on impeller leading edge, vibration. Cause: NPSHa below NPSHr. Fix: lower the pump (more flooded suction), shorten/upsize the suction pipe, fit a larger suction strainer, cool the fluid, or fit a smaller-flow impeller.
Dry running
Symptoms: smoke or melted plastic smell, mechanical seal destroyed, casing distorted. Cause: empty tank, blocked strainer, lost prime, closed suction valve. Fix: fit a low-level switch, dry-run-safe seal arrangement, or replace with a self-priming or magnetic-drive pump that tolerates short dry intervals.
Wrong impeller for the duty
Symptoms: pump runs far off its best efficiency point — either too far right (high flow, low pressure, vibration, cavitation risk) or too far left (low flow, recirculation, heating). Fix: trim the impeller or swap to the correct diameter. Get the pump curve before you buy.
Seal failure
Symptoms: leak around the shaft, fluid trail, motor overload trip. Cause: dry running, abrasive wear, wrong elastomer for the fluid, misalignment, or just service life. Fix: match the seal to the fluid, fit a seal flush plan if the fluid is dirty, check alignment.
Motor mismatch
Symptoms: motor overload trip on starting, motor running hot, motor thermal protection cuts in. Cause: undersized motor for the pump's actual operating point, or wrong IP/IE rating for the environment. Fix: oversize motor for safety margin, check the actual operating point on the pump curve, match IP rating to the environment. See our Industrial Electric Motor Guide for full motor selection.
Air entrainment / loss of prime
Symptoms: pump runs but delivers no flow, or flow fluctuates wildly. Cause: air leak on the suction side (often a fitting), suction line above the fluid level, swirl in the suction (vortex). Fix: check every suction fitting under suction (a soapy water test will find leaks), submerge the suction inlet deeper, fit a vortex breaker.
Maintenance
Daily and weekly checks
- Listen for unusual noise (rattle = cavitation; squeal = bearing; growl = motor)
- Look for leaks (shaft seal, casing joints, suction fittings)
- Check discharge pressure and flow against baseline
- Feel the motor casing — uncomfortably hot to touch means investigate
Monthly
- Vibration check (handheld accelerometer if you have one; otherwise hand-on-casing baseline)
- Greasing of pump and motor bearings per maker's schedule — small charge, often. Grease nipple types covers fitting identification.
- Coupling alignment check (laser or dial gauge for critical duties)
- Strainer/filter clean
Annual / planned shutdown
- Open and inspect the wet end — impeller wear, casing erosion, wear ring clearance
- Mechanical seal: inspect or replace as a planned task rather than failure-driven
- Bearing condition (vibration trend, noise, temperature)
- Re-baseline pump performance (flow, head, power) against original curve
- Re-grease per the chart for the pump and motor
Spare parts to hold
For any critical-duty pump: mechanical seal kit, gasket set, wear rings, bearings, coupling element. For PD pumps: relief valve spares, diaphragms/hoses/lobes as applicable. For air-operated lubrication pumps: muffler, air motor service kit, follower plate seals.
AIMS' Note on Safe Pump Operation
Two areas of risk that come up in nearly every workshop pump install.
Mechanical guarding and lockout
Couplings, belt drives and exposed shafts on pumps must be guarded. AS/NZS 4024.1 series sets out the safety requirements for machinery; in practice, fit a fixed guard that requires a tool to remove. Before any maintenance: isolate the power source, lock and tag the isolator, verify zero energy. See Lockout Tagout Guide.
Pressure relief and over-pressure
Every positive displacement pump and every system with a possible dead-head condition needs a relief path. AS 1271 covers safety valves for pressure equipment [VERIFY: AS 1271 currency — last reviewed by AIMS team 2024; Sheila/Sam to spot-check]. Set the relief below the weakest component's rated pressure. Test annually. Discharge the relief to a safe location — back to suction tank or to a vented drain, not into the workshop.
Chemical handling PPE
For acid, caustic and solvent transfer: chemical-resistant gloves matched to the specific chemical (nitrile is not universally safe — check a glove compatibility chart for the fluid you're handling), splash goggles or full face shield, chemical-resistant apron, eye-wash within 10 seconds reach (AS 4775 [VERIFY: AS 4775 reference for emergency eyewash and shower equipment — Sheila/Sam to spot-check]).
Hazardous areas
Petrol, AdBlue dispensing zones, solvent transfer areas, and many chemical storage rooms are classified hazardous areas under AS/NZS 60079 series. Pump motors in these zones must be Ex-rated. See our FAQ on electric motors in hazardous areas for the framework, and our electric motor guide for IP and IE rating context.
Frequently Asked Questions
What's the main difference between centrifugal and positive displacement pumps?
Centrifugal pumps use a spinning impeller to fling fluid outward — flow varies with discharge pressure and they cannot generate more pressure than their geometry allows. Positive displacement pumps trap and push a fixed volume of fluid per cycle — flow is roughly constant regardless of pressure, so they need a relief valve to prevent over-pressure. Centrifugals suit clean, thin fluids at high flow and modest head. PD suits viscous fluids, metering, high pressure or self-priming duties.
What pump should I use to transfer oil from a 205L drum?
A rotary gear or vane pump (positive displacement). For occasional use, a hand-operated Macnaught lever pump is the standard. For regular duty, an air-operated or electric drum-mount pump with a meter and control gun. Centrifugals are wrong for this — the oil viscosity is too high.
What is cavitation and how do I prevent it?
Cavitation is the formation and collapse of vapour bubbles inside a pump, caused when the local pressure drops below the fluid's vapour pressure. It pits the impeller, vibrates the pump, and drops performance. Prevent it by ensuring NPSH available exceeds NPSH required by a margin (0.5–1.0 m minimum, more for hot or volatile fluids): lower the pump, upsize the suction pipe, cool the fluid, or reduce flow.
Can a centrifugal pump run dry?
No — not for more than a few seconds. The mechanical seal relies on the fluid for cooling and lubrication. Running dry destroys the seal, and often the seal failure damages the shaft sleeve. Fit a low-level switch on the supply tank, or specify a dry-run-tolerant seal arrangement (magnetic drive, or seal with external flush).
What does NPSH mean and why does it matter?
Net Positive Suction Head. NPSH Required (NPSHr) is published by the pump manufacturer — the pressure margin the pump needs at its inlet to avoid cavitation. NPSH Available (NPSHa) is what your installation actually provides — atmospheric pressure plus static head minus friction losses minus the fluid's vapour pressure. NPSHa must exceed NPSHr by a safety margin. Get this wrong and the pump cavitates.
How do I choose a pump for chemical transfer?
First check material compatibility — every wetted part (casing, impeller, seal, gasket) must be compatible with the actual fluid at actual concentration and temperature. Diaphragm (AODD) or magnetic-drive centrifugal are the safest because they remove or minimise the dynamic seal. Browse chemical pumps and diaphragm pumps, and contact our team for compatibility verification on tricky fluids.
What's a self-priming pump?
A pump that can evacuate air from its suction line and lift fluid up to its inlet without manual priming. Most positive displacement pumps are self-priming (within their stated suction lift limit, typically 5–7 m). Standard centrifugals are not self-priming — they need a flooded suction or a one-way priming arrangement. Self-priming centrifugals exist but cost more and have specific operating limits.
How do I size a pump motor?
Read the power draw from the pump curve at your actual operating point (not the headline curve). Add about 15–20% safety margin to give a service factor. Match the motor IP rating to the environment (IP55 minimum for outdoor or washdown). Match efficiency class — IE3 minimum for continuous-duty industrial in Australia under MEPS [VERIFY: MEPS current threshold for motors — current at last AIMS review 2024]. See our electric motor guide.
What viscosity is too high for a centrifugal pump?
Above about 150–200 centipoise at operating temperature, centrifugal efficiency drops and power draw rises sharply. Above 300–500 cP, switch to positive displacement. Cold heavy oils, syrups, slurries, and polymer solutions are nearly always PD territory.
Why does my pump vibrate?
Common causes: cavitation (gravel rattle), misaligned coupling, unbalanced impeller, worn or damaged bearings, foundation problem, operating far off the best efficiency point, or pulsation from a PD pump without a dampener. Hand-on-casing gives you a baseline; a handheld vibration meter quantifies it. Anti-vibration mounts can isolate the pump from the structure — see anti-vibration mounts guide.
What's the difference between AODD and other diaphragm pumps?
AODD (Air-Operated Double Diaphragm) uses compressed air to flex two diaphragms alternately, giving continuous flow with no electric motor — ideal for hazardous areas and stop-start service. Single-diaphragm and mechanical-diaphragm pumps exist for specific duties (metering, low flow, electric drive). See our diaphragm pump guide for the detail.
How do I prevent my pump from running dry?
Three layers: a low-level switch on the supply tank that cuts the pump motor; a dry-run sensor in the pump itself (some manufacturers offer this); or specify a pump type that tolerates dry running (AODD diaphragm runs dry indefinitely; magnetic-drive centrifugal does not). For critical duties, fit two of these as defence in depth.
What's the right pump for transferring AdBlue?
AdBlue (urea solution) is corrosive to brass, bronze and copper alloys. Wetted parts must be stainless steel, polypropylene, PVDF or HDPE. EPDM elastomers; NOT Viton. Specific AdBlue pump kits are available from Macnaught and other suppliers. See our fuel transfer pumps guide for the broader fuel and AdBlue selection logic.
How often should I service an industrial pump?
Daily walk-around (look, listen, check leaks and gauges). Monthly: greasing per the schedule, alignment spot-check, strainer clean. Annually or per planned shutdown: open the wet end, inspect impeller and wear rings, replace seals as a planned task rather than waiting for failure. Critical-duty pumps benefit from a condition-monitoring programme (vibration, temperature, power trend).
Browse Industrial Pumps at AIMS
- Pumps & fluid handling — the full range
- Chemical pumps
- Diaphragm pumps
- Oil pumps and equipment
- Grease equipment and grease pumps
- Fuel transfer equipment
- Hose reels and accessories
- Macnaught — Australian-owned flagship lubrication and fuel-transfer brand (651 products)
- Alemlube — lubrication-system specialist
- Retracta — hose reels
Not sure what you need? Call (02) 9773 0122 or contact us via the contact page — Sam and the sales team can talk you through the spec questions and find the right pump for your duty.
