Caple India · Dust collectors
Woodworking dust collectors and extraction systems for Indian factories
Caple supplies single-bag, multi-bag, pulse-jet and centralised dust collectors for cabinet shops, edge banding lines and CNC router operations. Systems range from 3 HP mobile units to 15 HP centralised plants, with anti-static polyester filter media for fine MDF dust. You can see them running daily at our Pelhar and Delhi demo centres.
3–15 HPPower range | 8+Configurations |
48 hoursService response, pan-India | 4.5+Google rating, 120+ reviews |
Why wood dust is a health and production cost
The International Agency for Research on Cancer (IARC) classifies wood dust, from both hardwood and softwood, as carcinogenic to humans (Group 1). It is linked to cancers of the nose and sinuses, and the highest exposures occur in furniture and cabinet making, especially sanding. Fine dust from routing, sanding and MDF stays airborne longest and reaches deepest into the lungs.
Typical workplace exposure limits over an 8-hour day are 1 mg/m³ (ACGIH guideline), 2 mg/m³ for hardwood in the EU and 3 mg/m³ for hardwood in the UK.
Hidden costs of poor dust extraction: sick days, faster tool wear from re-cut chips, dust in spindles and electronics, weak edge-banding glue lines, cleaning hours and higher fire risk.
Dust classes L, M, H and HEPA filters
| Class | Filtration efficiency | Typical use |
|---|
| L (low hazard) | Above 99% | General clean-up dust |
| M (medium hazard) | Above 99.9% | All wood and MDF dust; the recommended minimum for woodworking |
| H (high hazard) | Above 99.995% | Carcinogenic or pathogenic dust such as asbestos and mould |
| HEPA (H13/H14) | Tested at 0.3 micron | Final filter stage inside M- and H-class units |
A dust class applies to the complete extractor, including hoses and seals, not just the filter.
How to size a dust collector: CMH, velocity and pressure
| Parameter | Why it matters and typical value |
|---|
| Airflow (CMH) | Size the system by machine ports and duct velocity, not by motor HP.
Typical: 400–500 CFM per spindle, 800 CFM per edge bander, 1,000–1,500 CFM per CNC router |
| Conveying velocity | Too low and chips settle and block ducts; too high and power is wasted, since fan power rises with the cube of air speed.
Typical: 20 m/s for dry material, 28 m/s for wet material |
| Air-to-cloth ratio | Airflow divided by filter area; if it is too high, fine dust passes through or blinds the filter.
Typical: About 75–220 m³/h per m² of filter |
| Fan pressure | Suction available to overcome duct, hood and filter resistance.
Typical: 2,400–3,400 Pa |
| Pressure drop | A rising pressure drop means a loaded filter and weaker suction at the machine.
Typical: Monitor with a differential-pressure gauge |
Ducting rules: no air leaks, gradual bends, minimum flexible hose, full earthing, and a cyclone or settling chamber before the filter for heavy chip loads.
Filter cleaning: manual, shaker or reverse pulse jet
| Method | How it works | Best for |
|---|
| Manual | The operator shakes the bags with the fan switched off | Single-bag mobile units in light, single-shift use |
| Shaker | A motor-vibrator shakes the filter sleeves while the extractor is off | Medium-duty units with intermittent use |
| Reverse pulse jet (RPJ) | Compressed-air pulses clean the filters section by section while extraction keeps running | CNC routers, edge banders, and multi-machine or multi-shift plants |
Manual dampers vs pneumatic dampers
- Manual blast gates are low-cost and simple, but rely on operators to close idle branches. One open gate on an idle machine steals suction from the others.
- Pneumatic dampers open and close automatically with each machine. Combined with a pressure sensor and an inverter (VFD), the fan delivers only the air needed. One published industry example shows annual fan energy falling from 84,000 kWh to about 45,000 kWh, a saving of about 46%, or roughly ₹3.5 lakh a year at an assumed ₹9 per kWh. Actual savings should be verified on site.
Fire and explosion safety for dust collectors
- Use anti-static filter media, and earth and bond all ducts and hoses.
- Place the fan on the clean-air side for heavy dust loads.
- Fit sprinklers or a dry-pipe connection inside the filter, and explosion vents with non-return valves on larger units.
- Keep fine-dust and coarse-chip lines separate, and empty bins regularly; fine-dust deposits are a fire and explosion hazard (OSHA).
You get a dust collector sized by airflow, velocity and filter area for your machines. You achieve cleaner air, steady suction at every CNC router and edge bander, and a better finish. You save cleaning hours, tool and filter costs, electricity and fire risk.
Dust collector buying questions answered
Which dust collector size do I need?
Add up the airflow for every machine that runs at the same time, using the values in the sizing table above. Caple's regional executive confirms the size after a site walk-through.
How often do filter bags need replacing?
Typically every 12–18 months in single-shift operation. Caple stocks replacements in India for same-week dispatch.
Can I retrofit ducting to my existing factory?
Yes. Caple supplies the dust collector with duct sizing drawings and can recommend tested GI duct contractors.
Do Caple dust collectors meet Indian factory norms?
Correctly sized systems are designed to support Factories Act 1948 dust-extraction requirements. Actual compliance depends on site installation and air monitoring, and documentation is provided for inspections.
Is pulse-jet cleaning better than a shaker?
For CNC routers, edge banders and multi-shift work, yes. Pulse-jet cleaning runs during extraction, so suction stays steady without stopping production.
Do you offer annual maintenance contracts?
Yes. AMCs cover filter changes, motor checks and duct integrity tests, with service response within 48 hours across India.
Caple Industrial Solutions · Woodworking machinery, consumables and service · web@caple.in
