Low noise industrial vacuum cleaner

Cost layers that move when noise is a requirement

1. Base machine at a stated duty

   Motor power and duty cycle at the speed used for the noise test. If the quiet setting reduces airflow, ask for both points on one curve.

2. Acoustic hardware

   Enclosure panels, an exhaust silencer, or isolation pads. Mark each as included or optional. Do not fold them into a vague quiet package.

3. Filters under the same housing

   A tighter cartridge can change both dust release and the pressure the fan works against. Ask whether the noise test used a clean filter or a loaded one.

4. Freight of the larger crate

   Acoustic covers add millimetres and kilograms. Update gross weight before you compare Incoterms. The US destination stays on every offer.

5. Commissioning and training

   Who explains the speed setting that was tested, and whether a factory acceptance test includes a sound reading. If the supplier will not measure on site, say who will.

Standard machines can be enough when the published noise, at a distance you accept, already sits under the limit your safety lead wrote down. A custom silencer is a different configuration and should not be compared with the standard crate as if the scopes matched. Both paths are legitimate. The checklist exists so the team picks one before the quotations arrive.

A repeatable sound check names the room or aisle, the meter height, and the distance, for example 1.0 m from the housing with the floor tool fitted and a clean filter. Power is the nameplate voltage, such as 120 V or 230 V at 60 Hz. Record dB(A), the fan speed, and whether the figure is a single reading or an average. Steps the supplier can repeat are: mount the agreed hose, for example 40 mm or 50 mm, run five minutes, read the meter, then repeat with a loaded filter if that is your real duty. Missing the distance or the tool state means the quieter number cannot be copied into the comparison table.

Set three shapes side by side before you call any of them low noise: an open canister, the same canister with an exhaust silencer, and a housed unit with a lower fan speed. The lines that matter are the dB(A) basis, the airflow change in m3/h, the added millimetres of crate height, and the filter cost per month if you already know the change interval. Four lines times three shapes is the comparison. A lower fan speed can cut sound and also cut airflow. An added silencer can hold airflow and raise freight. Write the trade rather than a single quiet label. The same table should carry duty cycle, rated power, input voltage, working envelope, control interface, utilities requirement, commissioning scope, bill of materials, spare parts list, specification deviation, delivered cost, service access, ambient temperature, ingress protection, repeatability, and noise level. Sample blanks are 68 dB(A) versus 74 dB(A) at 1.0 m, 180 m3/h versus 320 m3/h, a crate of 900 mm versus 1200 mm, and filter changes at 40 hours versus 80 hours. Those blanks are prompts for the supplier, not measurements from this desk.