1. Can welding fume and grinding dust share one system?

Treat them separately: fume rises, grinding dust settles, and shared ducts add risk.

2. How do you judge a hood design?

Check that the generation point is enveloped, hood distance and direction suit airflow, and ducts do not collect dust.

3. Why is a new unit still not pulling?

Usually hood distance, hood direction against hot air, long flat ducts, or poor filter cleaning — not fan power.

4. When should filters be changed?

Watch airflow falling, pressure rising and dust carry-over, and clean to schedule; a calendar alone is not enough.

5. What is special about aluminium grinding dust?

It is a higher-risk combustible dust; collection method, explosion protection and electrical ratings need a specialist judgement.

6. Why is duct dust dangerous?

Accumulated dust is fuel; a reported aluminium dust explosion spread along branch ducts after igniting inside them.

7. Can compressed air be used to clean a station?

No — it moves dust into the air. Vacuum dry material first, then wet-clean floors and recover the water.

8. Which tools suit a welding and grinding area?

A filtered industrial vacuum for swarf and dry dust, a scrubber for floors, and hose or high-pressure water for corners.

9. Why plan this equipment at project stage?

Stating the target, use case and frequency upfront avoids scattered purchases later and fixes the acceptance terms.

10. How should equipment be accepted?

Three gates — factory, arrival, commissioning — verifying nameplate data and measured performance, with consumables handed over.

1. Why treat mist and floor oil together?

Mist settles and drips into floor soil, so fixing one end lets the other undo the result.

2. How do you judge a mist capture design?

Check hood enclosure, duct fall and liquid build-up, fan placement and an accessible oil return path.

3. What floor cleaning sequence works?

Dry first, wet second: vacuum chips and fines, then scrub with water recovery.

4. How often should oily floors be cleaned?

By load: heavy areas every shift, medium daily, light weekly, with drip sources assessed where grip is poor.

5. Is tram-oil separation worth doing?

It cuts odour and degradation, extends coolant life and reduces waste liquid volume.

6. How should oily waste be stored?

Keep streams apart, label type, source and date, log transfers, and use bunds to prevent seepage.

7. Which tools suit a machining shop?

A filtered vacuum for dry fines, a scrubber for oily floors, and high-pressure water for equipment and corners.

8. What limits cleaning hours?

Notices restrict spraying, baking, welding and road washing to set windows and humidity conditions.

9. Why plan cleaning equipment at project stage?

Public tenders already bundle vacuums and scrubbers with extraction and fume units in one schedule.

10. How should equipment be accepted?

Three gates — factory, arrival, commissioning — verifying nameplate data and measured performance.

1. Why is settled dust a safety issue?

Enforcement findings repeatedly centre on heavy settled dust and cleaning procedures that are not implemented.

2. What must a cleaning plan state?

Who cleans, which areas, how often, where it is recorded, plus a ban on compressed-air blowdown and a rule for tool zoning and storage.

3. How is cleaning frequency set?

By dust load: high-dust areas every shift, medium and low areas daily or weekly, elevated surfaces weekly or monthly, plus a full clean after material changes or maintenance.

4. Which surfaces are most often missed?

Duct surfaces, fan and equipment tops, beams and cable trays, corners and column bases, trench edges, equipment backs and undersides, and discharge outlets.

5. What tools suit dry dust areas?

A filtered industrial vacuum rather than compressed air or a dry broom; suitability of powered equipment in a combustible dust area is judged by a specialist.

6. How do you size an industrial vacuum?

Match bin volume, airflow and filter area to the dust volume and type; verified figures are only a reference.

7. How is secondary dust controlled?

Wet or vacuum collection, controlled air speed and direction, prompt sealed transfer, and no high-drop tipping.

8. What matters most in dry collection checks?

Discharge and discharge-lock function, fan and duct condition, filter servicing, and explosion venting or isolation.

9. Can generation points share one collection system?

Points in different fire compartments should not casually share one system; check against current rules and design documents with specialist review.

10. In what order should a self-inspection run?

Plan, frequency and records, missed-surface list, collection and discharge, sealed transfer, then tool zoning.

1. What is most often missed before deployment?

Network coverage, dock and water-point placement, and a named person who owns the machine.

2. How often should the map be updated?

No fixed cycle — update when the layout changes, and suspect the map first when one area keeps failing.

3. Map an empty floor or the real layout?

The real layout. Maps built on an empty floor rarely work in production.

4. How often do brushes and side brushes need replacing?

It depends on floor type, soil and daily hours; use the log and wear, not a fixed number.

5. How should the battery be treated?

Avoid deep discharge in storage and charging in high heat; refer anomalies to the provider.

6. How should a fault be graded?

On-site fix, remote or provider support, and stop-and-preserve for collision, fall, smoke or leakage.

7. When should work return to a person?

When the zone or the soil is beyond the machine; write the handover list before go-live.

8. Several robots need charging at once — what then?

Size docks, water points and discharge points to the fleet, and agree a queue or off-peak rule.

9. What must the operations log contain?

Deployment and mapping, daily start and close, consumables, faults, handover and safety inspections.

10. Can “operators replaced” be a performance target?

Not directly. It rests on assumptions; state the basis or it will not hold up in review.

1. What removes oil film from shop floors?

Absorb standing oil first, then scrub and recover with a compatible degreaser. Never discharge oily water to storm drains.

2. Can a household scrubber dryer be used in a workshop? 

Not recommended. Tank volume, brush pressure and duty cycle are sized for homes, not continuous workshop loads.

3. Can a scrubber dryer collect sanding dust? 

No. Dry dust cakes in wet filtration and should be collected with a dry vacuum.

4. Is explosion-protected equipment mandatory for aluminium dust? 

This is a combustible dust determination and must be made by a qualified specialist.

5. May battery machines be used inside a spray booth? 

Hazardous-area classification governs this. A specialist must decide; battery power alone is not a justification.

6. Can a service pit be cleaned with a pressure washer? 

A pit is a confined space. Follow a permit procedure and avoid flushing oil into standing water.

7. How is wash-bay water handled?

Grit trapping, oil separation, settlement, scheduled desludging and licensed sludge disposal.

8. How often should squeegee blades be replaced? 

No fixed interval. Replace when water trails, nicks or deformation appear, and log it.

9. How are dry vacuum filters maintained? 

Follow the manual for cleaning or replacement, shorten intervals under heavy dust, and protect operators during handling.

10. What is most often missing at handover? 

Electrical protection details, the charging plan, signage, spare parts and documented operator training.

1. Should I choose lead-acid or lithium batteries for a sweeper? What are the technical differences between the two battery configurations offered by the A900?

Lead-acid Battery

Advantages: lower cost (about 1/3 of lithium), mature technology with established recycling channels, stronger tolerance to overcharge/over-discharge.

Disadvantages: heavy weight (A900 lead-acid configuration with 200AH×8 blocks is significantly heavier), cycle life 300-500 cycles, capacity degrades quickly after deep discharge.

Lithium Battery

Advantages: lightweight (about 1/3 of lead-acid for equivalent capacity), cycle life 1000-2000 cycles, stable discharge voltage plateau, no memory effect.

Disadvantages: higher initial investment, noticeable performance drop in low-temperature environments.

Siben A900 offers both 48V (200AH×8) maintenance-free lead-acid and 200AH lithium configurations.

Selection advice: for under 4 hours/day operation with limited budget, choose lead-acid; for 6+ hours/day prioritizing longevity and fast charging, choose lithium; for multi-unit rotational deployment, lithium's fast-charging turnover is recommended.

2. How does the anti-overflow sensor in a scrubber's dirty water tank work? How to prevent odor and scale buildup in the tank?

The anti-overflow sensor uses a float switch or electrode-type liquid level sensor installed at the tank's upper position (typically 5-8cm from the top). When wastewater reaches the sensor, the control board automatically shuts off the vacuum motor and brush water supply while triggering audible/visual alarms on the dashboard. Risks without anti-overflow sensors: wastewater backflows into the vacuum motor and brush water lines, causing motor short circuits and pipeline contamination. Anti-odor and anti-scale measures:

① drain and rinse the tank interior with clean water after each operation to prevent organic fermentation;

② use defoamer weekly to reduce foam buildup (foam clogs suction lines);

③ monthly tank cleaner soak for 30 minutes then flush to dissolve scale and oil residue;

④ keep the bottom drain valve clear — if draining slows, clean the valve opening.

Siben X-series tanks feature anti-corrosion interior coating and standard float-type overflow sensors. For food processing plants prone to odor, thoroughly clean the tank every 3 days.

3. How is the water spray volume controlled in a sweeper's dust suppression system? How should spray duration and tank capacity be matched?

The spray system uses a micro water pump to deliver water from the tank to nozzles, creating a mist in front of the main brush for dust suppression and preventing secondary airborne dust. Water volume control methods:

① manual ball valve — operator adjusts valve opening based on dust concentration, simple and reliable;

② solenoid valve automatic control — control board auto-matches water volume to travel speed and gear. Siben A300: 75L water tank, 60-min spray duration; A600: 60L water tank, 60-min spray duration.

Matching principle: tank capacity ÷ spray flow rate = continuous spray duration. 60 minutes of spray paired with 2.5-4.5 hours runtime means spraying 1 minute every 2.5-4.5 minutes (intermittent mode), sufficient for dust suppression. High-dust scenarios (cement plants, coal mines): reduce interval to every 1-2 minutes, or continuous spray with portable water refills.

Notes: in sub-zero temperatures, drain tank and lines to prevent freezing and pump damage; clean nozzles monthly with a needle to prevent scale blockage.

4. How is adjustable brush pressure technology implemented in floor scrubbers? What cleaning scenarios do different pressure levels suit?

Adjustable brush pressure is achieved by regulating air springs or electromagnetic proportional valves to control the brush's downward travel, changing bristle-to-floor contact area and pressing force. Technical principle: pneumatic system adjusts air pressure → cylinder rod travel changes → brush bracket angle shifts → bristle compression changes → pressure on floor changes accordingly. Typically 3-4 levels:

① Light (15-25kg) — suits epoxy, PVC and other smooth sensitive floors, preventing coating scratches;

② Medium (30-40kg) — suits tile, marble and medium-hardness floors, standard daily cleaning level;

③ Heavy (45-60kg) — suits concrete, densified floors, removing stubborn stains and old wax;

④ Extra-heavy (60kg+) — suits rough concrete and industrial heavy oil contamination, requires hard bristles or wire brushes.

Siben X-series ride-on scrubbers feature 3-level pressure adjustment via panel knob, switchable during operation without stopping.

Notes: excessive pressure causes bristle over-wear (50% shorter life), motor overload heating, and floor surface damage; insufficient pressure leaves residual dirt.

Correct approach: start at medium level, observe cleaning effect and bristle wear, gradually adjust to optimal level.

5. How does the sweeper hopper full-load warning system work? What happens if operation continues after the hopper is full?

The hopper full-load warning system uses photoelectric or load sensors to detect debris volume. Working principle: ① Photoelectric — infrared sensor pair installed at the hopper top interior; when debris blocks the beam, warning triggers;

② Weighing — load sensors at the hopper bottom trigger alarm at preset weight threshold.

Warnings typically have two levels:

Level 1 (85% capacity) — dashboard yellow indicator lights up, reminding operator to prepare for dumping;

Level 2 (95% capacity) — audible/visual alarm with automatic drive motor power limitation and speed reduction, prompting immediate stop for dumping.

Consequences of continued operation when full:

① debris overflows and clogs suction ducts, dust cannot enter the hopper and is expelled through the air outlet causing secondary airborne dust;

② vacuum motor runs under high load in clogged conditions, overheat protection triggers or motor burns out;

③ main brush jammed by debris, sweeping efficiency drops sharply with brush motor overload;

④ overloaded hopper affects driving stability and braking distance.

Siben A300 hopper 80L, A600 180L, A900 240L — all equipped with full-load warning systems.

Advice: arrange dumping at Level 1 to avoid forced shutdown at Level 2 disrupting operational continuity.

6. How long does it take for floors to dry completely after scrubbing? What technical methods can shorten drying time?

Post-scrubbing floor drying time is influenced by floor material, ambient temperature/humidity, squeegee efficiency, and water volume settings.

General guidelines: epoxy and tile floors dry in 2-5 minutes, concrete in 10-15 minutes, rough densified floors in 15-30 minutes.

Technical methods to shorten drying:

① reduce water output — smooth floors use low setting (0.2-0.3L/min) to minimize residual moisture;

② optimize squeegee condition — blade must fit tightly without gaps, use polyurethane material (excellent elasticity and wear resistance), regularly inspect blade wear;

③ increase vacuum motor power — higher power generates greater negative pressure, improving recovery efficiency and reducing residual water streaks;

④ control travel speed — reduce speed to allow the squeegee adequate time to recover dirty water, as excessive speed prevents proper recovery;

⑤ environmental assistance — open windows for ventilation or use industrial fans to accelerate air circulation;

⑥ dual-speed brush — high-speed scrubbing followed by low-speed water recovery reduces water mist.

Siben X-series with high-power vacuum motors and premium polyurethane blades achieves drying within 3 minutes under standard conditions (epoxy floor, 20°C room temperature, 50% humidity).

Note: place warning signs before floors are fully dry to prevent pedestrian slips.

1. Should I size by floor area or by productivity?

By productivity. Area defines workload; productivity defines how many people and machines you need.

2. Walk-behind or ride-on?

Weigh working width, passage width and continuous runtime. Narrow passages favour walk-behind; large flat areas favour ride-on.

3. What suits a basement car park?

Ride-on in open areas, after measuring passages and turning space, plus ramp hold, lighting and lone-working safety.

4. Grease resists a single pass. What next?

Pre-spray with dwell time, then scrub mechanically; extra brush pressure alone wears the floor with little gain.

5. When should squeegee blades be replaced?

On condition: visible water trails, edge damage or lost flexibility.

6. Are cleaning robots worth it now?

Worth assessing for fixed, repetitive routes once coverage, support staffing, fault recovery and consumables are costed.

7. Should sound level be in the tender?

Yes. Offices and malls are noise sensitive; set a limit alongside scheduling requirements.

8. How do I compare supplier offers?

Convert consumables, spares, maintenance and downtime into one three-year figure first.

9. What is most often missed at acceptance?

Trial operation on the building's real floor and recording baseline parameters.

10. What if utilisation is low after purchase?

Recheck the zoning and productivity model, and the scheduling window; the usual cause is a mismatch.

1. Should I choose by watts or airflow?

Watts describe energy use. Read airflow and vacuum pressure together, and ask for a curve.

2. Is a 50mm inlet enough?

It is a common industrial compromise, but heavy debris or very long runs need their own calculation.

3. What does a 0.3 micron rating mean?

Particles near 0.3 microns are the hardest to capture and serve as a reference point.

4. Why use a pleated or membrane filter?

A smoother surface resists embedding, so pulse cleaning recovers pressure drop better.

5. Cordless or corded?

Corded suits long fixed work; cordless suits multiple stations and temporary jobs.

6. Can I pick up wet and dry together?

It is not advised; a dry-then-wet sequence is usually more stable.

7. What matters with combustible dust?

Zone classification first, then matched certification, plus full grounding and antistatic parts.

8. How often should the filter be replaced?

Decide by pressure drop and visual condition, and keep a record.

9. How do I size the bin?

Size it so a shift needs one emptying at most; around 100 litres suits fixed-route work.

10. What is most often missed at acceptance?

Testing nozzle-end suction and recording the initial pressure drop.