Low-noise compressors for laboratories and clinics

The operating instructions for Jun-Air's oil-lubricated compressors state 35–58 dB(A) measured at 1 m, depending on the model, and the oil-free system 87R-4P is specified at 46 dB(A) at 50 Hz.

Three questions before you compare models

• Does the air have to be oil-free? Jun-Air has both oil-free and oil-lubricated models for medical equipment, laboratories and food, so it depends on what the equipment requires
• How many hours at a stretch will it run? That determines whether you need a 100% duty cycle
• Do you need a dryer? That depends on what the equipment requires, and Jun-Air supplies oil-free models with a dryer, both with and without a cabinet

Oil-lubricated

Jun-Air's tank-mounted oil-lubricated piston compressors — models 3-4, 6-4, 6-15, 6-25, 12-25, 12-40 and 18-40 — are specified at under 45 dB(A) on the manufacturer's product pages. The operating instructions give 35 dB(A) for 3-4, 45 dB(A) for 6-4, 6-15 and 6-25, 48 dB(A) for 12-25 and 12-40 and 50 dB(A) for 18-40, measured at 1 m. The duty cycle is given as 50%, meaning the compressor runs half the time, and the operating instructions set a limit of 15 minutes per cycle at 8 bar. For a dental surgery where the compressor runs in fits and starts throughout the day, that is plenty.

Oil-free

The oil-free models are rocking piston compressors. They are available tank-mounted without a cabinet (basic), in a cabinet, with a dryer, and in versions with two units on the same tank for greater air demand.

The 86R and 87R systems are specified with a 100% duty cycle, but the operating instructions for the 87R-4P say 50% or less — check the specific model before you count on continuous operation.

With or without a cabinet

The cabinet reduces noise further and hides the unit. Without a cabinet — what Jun-Air calls basic — the machine is more visible and audible. If the compressor is in a plant room, a cabinet is often unnecessary; if it is in the same room as people, that is the whole point.

We can help with sizing

Tell us how many outlets need to be supplied at the same time, how much air they use and which room the compressor will be in. You will then get a proposal with the right tank size, not just the right machine.