The screws of the catalogue stop at 16 bar. Beyond, two technologies: the high-pressure piston, from 2.2 to 45 kW, for 300 to 500 bar, and the diaphragm compressor for gases, from 3 to 250 kW, from 25 to 1,000 bar. The piston fills cylinders and feeds test benches; the diaphragm compresses a gas with no contact between the gas and the oil.
Between the two, oil-free boosters from 8 to 40 bar raise the pressure of an existing network: they sit with the oil-free compressors, because that is where the air quality question is asked.
A high-pressure machine runs in cycles, not continuously. It is sized on the volume to fill and the time available, not on an hourly flow: how many cylinders, of what capacity, at what service pressure, in how long. The flow of the catalogue's pistons runs from 0.08 to 2.2 m³/min, which looks small and is enough for these cycles.
The service pressure of the cylinders or of the bench sets the final pressure; the catalogue offers two levels, 300 and 500 bar. The quote is built on these four figures.
The machines carry the CE marking and, for pressure equipment, the PED conformity stated on each model page. For breathing air, downstream filtration is part of the installation, not an option: the catalogue holds high-pressure filters up to 40 bar and the complete chain is quoted with the machine.
A multi-stage piston cools the air between stages; that cooling is what holds the temperature and the consumption. Maintenance intervals are counted in running hours and appear in the documentation delivered with each model. As everywhere, flow, pressure and noise are measured machine by machine.
The service pressure of the cylinders, with the filling margin: the catalogue offers 300 and 500 bar. Filling time and the number of cylinders then decide the flow, between 0.08 and 2.2 m³/min.
A booster starts from an existing network at 7 or 8 bar and raises it up to 40 bar, oil-free; a high-pressure compressor starts from ambient air and rises to 300 or 500 bar. Between 16 and 40 bar on a network that is already clean, the booster is the simple route.
Three years of machine warranty, extended to five years as long as the installation stays supervised by SEENTINEL; if supervision stops, the warranty returns to three years. Parts available for ten years after delivery, shipped within 24 to 48 hours in mainland France.
