Utility drawings usually carry one compressed-air line: 0.5–0.7 MPa. The datasheets CHUANGQI publishes do not support a single line: across the nine families tabulated below, inlet setpoints run 0.1–0.8 MPa and demand runs from under 280 NL/min to 4.0 m³/min. Sizing follows the family, not the room.
Every figure in this study was copied from a published CHUANGQI product specification sheet on 20 October 2026, including the families that publish no air figure at all. Nothing here is estimated, rounded or carried over from a distributor summary. Before shipment, every unit in the catalogue goes through the same factory routine: spray pressure is calibrated, drying temperature uniformity is tested, the machine runs 72 hours nonstop, and sample boards are used for the ionic cleanliness check. The datasheet numbers are therefore production values, not prototype values.
Key takeaways
- Air setpoints across nine families span 0.1–0.8 MPa; one 0.5–0.7 MPa line under-specifies both ends.
- Air demand runs from under 280 NL/min to 4.0 m³/min, roughly a 14-fold spread.
- Water supply pressure splits into two bands: 0.1–0.3 MPa and 0.2–0.3 MPa.
- Four different exhaust interfaces appear across the range, so budget for adapters.
- Electrical demand runs from 200 W to 130 kW on the same plant floor.
Eight Datasheets, One Question: What Do You Actually Have to Supply?
Method. This is a desk study, not a bench test. On 20 October 2026 we read the published specification sheet of every machine in the CHUANGQI catalogue that lists an air, water or exhaust field — 15 machines across nine families — and extracted four fields: inlet air pressure, air demand, water supply or drain requirement, and exhaust interface. Values are quoted as published; where a family row combines several models, the cell states the envelope across their sheets and the text names the model behind each endpoint. Where a sheet states no value, the table says so instead of filling the gap. The remaining sheets — the brushing machine, the circuit-board cleaner, the two dust-removal units, the plasma cleaner, the fan filter unit and the cleaning-fluid entry — carry none of these fields. The study does not cover hose length, pressure drop, air dew point or duct sizing, because those figures are not published and a buyer should not infer them from a catalogue.
| Family and model | Air inlet | Air demand | Water, drain, exhaust |
|---|---|---|---|
| CQ-C9610 inline PCBA washer | Not published | Not published | DI inflow 1.0 m³/h, above 15 MΩ; 130 kW |
| CQ-C743 offline PCBA washer | 0.45–0.7 MPa | Not published | DI inflow 0.5 m³/h; dry to 99 °C |
| CQ-C740 / C750 / C750S stencil spray | 0.45–0.8 MPa across three sheets | Not published | Water 0.2–0.3 MPa; port W124 × H30 mm on the CQ-C740 |
| CQ-C753 substrate cleaner | 0.4–0.5 MPa | Not published | None listed |
| CQ-C730 / C730S pneumatic screen cleaner | 0.4–0.6 MPa | 400–600 L/min | Port Ø125 × H25 mm |
| CQ-C716 / C700 nozzle cleaner | 0.5–0.6 MPa | Below 280 NL/min | DI 300 cc/h; in Ø8, drain Ø6 |
| CQ-C756 fixture and pallet washer | 0.4–0.6 MPa | Not published | Water 0.1–0.3 MPa; duct 125 mm |
| CQ-C770 squeegee cleaner | 0.45–0.8 MPa | Not published | Port 120 × H40 mm |
| CQ-C900 / C7310 / C7320 dry ice | 0.1–0.8 MPa, adjustable | 0.5–4.0 m³/min | No water, no drain; IP55 |
Source: CHUANGQI published product specifications, retrieved 2026-10-20. Values are machine limits at published settings.
Read the table by column and a pattern appears. The families that publish an air demand figure are the ones where air is the working medium: the air motor on the pneumatic screen cleaner, the jet on the dry-ice cell, the spray on the nozzle unit. The families that publish no demand figure use air as an auxiliary — valve actuation, blow-off, cabinet purging — and that is precisely where an RFQ written from memory goes wrong. A buyer who budgets a nozzle cleaner at the pneumatic cleaner’s 600 L/min will over-buy compressor capacity by roughly a factor of two; a buyer who budgets a dry-ice cell at the nozzle cleaner’s figure will under-buy by an order of magnitude.
Pressure Setpoints Run 0.1 to 0.8 MPa, Not 0.5 to 0.7
The narrowest inlet band in the catalogue belongs to the pneumatic screen cleaners: 0.4–0.6 MPa on the CQ-C730 and CQ-C730S. That band is narrow because the air motor is the load, so the inlet pressure is not a free variable — it is the drive. Set it outside the band and the machine is no longer operating as specified, whatever the board looks like afterwards.
The spray-based stencil cleaners sit higher and wider. The CQ-C740 publishes 0.45–0.7 MPa; the CQ-C750 and CQ-C750S publish 0.5–0.8 MPa. All three are 30 kW machines that also need water at 0.2–0.3 MPa, so their utility sheet has two pressure lines with two different regulators, and the higher one is not a safety margin — it is the band the spray pattern was validated in.
The CQ-C770 squeegee cleaner publishes 0.45–0.8 MPa, the same upper value as the multi-function stencil units, on a machine that takes no water at all. Grouping it with the wet stencil cleaners because both clean SMT tooling is a common mistake: one needs a water supply and a drain, the other needs neither.
The nozzle cleaners publish two separate pressure figures of their own — inlet 0.5–0.6 MPa and spray 0.4 MPa on the CQ-C716 and CQ-C700 — while the fixture and pallet washer, examined below, lists three. That gap exists because the internal regulator sets the spray, so the inlet is a supply requirement rather than a process setting. Buyers who read only the spray figure then buy a regulator they do not need.
Two families break the 0.5–0.7 MPa habit entirely. The dry-ice cells publish 0.1–0.8 MPa, adjustable, a band more than three times wider than the narrowest in the table; the 0.1 MPa figure is the floor of the adjustment range, and the working setpoint is a separate decision that belongs on the process sheet rather than on the utility drawing. The fixture and pallet washer publishes a 0.4–0.6 MPa air requirement but a spray pressure given as 3–6 bar. Those two lines describe the same order of magnitude in different units, and reading bar as MPa is the single most common transcription error we see in incoming utility data (3–6 bar equals 0.3–0.6 MPa).
Air Volume Sizes the Compressor: 280 NL/min to 4.0 m³/min
Pressure decides whether a machine runs; volume decides whether the compressor can feed it alongside everything else. Here the catalogue splits into three tiers, and the spread is what matters: the CQ-C716 and CQ-C700 nozzle cleaners publish below 280 NL/min, the CQ-C730 and CQ-C730S publish 400–600 L/min, and the three dry-ice models publish 0.5–4.0 m³/min. Converting the top figure, 4.0 m³/min is 4,000 NL/min, so the largest demand in the catalogue is about 14 times the smallest. A header designed around the nozzle cleaners will starve a dry-ice cell; a header designed around a dry-ice cell at full flow will be oversized for every other family on the floor.
Dry-ice demand is a setting, not a constant. The CQ-C900, CQ-C7310 and CQ-C7320 publish the same flow band, 0.5–4.0 m³/min, alongside a pellet feed rate of 0.1–0.6 kg/min and a pressure range of 0.1–0.8 MPa, all adjustable. The number your compressor sees therefore depends on where the cell is set, which is why an RFQ that asks only for the machine model cannot produce a correct air budget. Send the intended setting with the model.
Water-heavy families pay in a different currency. The CQ-C9610 inline PCBA water cleaning machine publishes 130 kW, DI water supplied at 1.0 m³/h — about 16.7 L/min — against a published consumption of 10–16 L/min, which is internally consistent and worth checking on your own drawing. It publishes no air figure at all. The electrical and water services, not air, dominate that family’s utility budget.
Water, Drain and Exhaust: Three Items Missing From Most RFQs
Water supply pressure is not one number. The fixture and pallet washer CQ-C756 publishes 0.1–0.3 MPa; the electric and multi-function stencil cleaners publish 0.2–0.3 MPa. A 0.3 MPa house line sits at the top of both bands, which means any upstream draw during a shift pushes both machines below their published range. Regulate per machine, not per room.
DI quality and drain are separate line items. Both water-based PCBA washers publish a rinse resistivity above 15 MΩ, with 1.0 m³/h feeding the CQ-C9610 and 0.5 m³/h the CQ-C743, and the CQ-C743 carries 0.45 µm filtration on its DI drain. The nozzle cleaners are the other end of the scale: 300 cc/h of DI water, an Ø8 air inlet and an Ø6 drain. Two machines on the same bench, two different plumbing standards (a Ø6 drain will not accept the flow a CQ-C743 discharges).
Exhaust interfaces do not standardise themselves. The catalogue publishes four: Ø125 × H25 mm on the pneumatic screen cleaners, 120 × H40 mm on the squeegee cleaner, W124 × H30 mm on the CQ-C740, and a 125 mm duct on the CQ-C756. Four shapes across eight families means fabrication drawings for at least three adapters, and that work is usually discovered in the week the machine lands.
What this table cannot tell you. This is not suitable for compressor sizing on its own. Simultaneous-use factors, hose lengths, pressure drop, receiver volume and air dew point are site data, and none of them are published here — do not infer a dew-point specification from a catalogue that does not state one. The table also does not describe a machine running outside its published settings, and it does not cover the brushing machine, the circuit-board cleaner, the two dust-removal units, the plasma cleaner or the fan filter unit, whose published sheets carry no air or water figures in these fields. If your header cannot meet a band, the answer is a regulator or a dedicated line, not a lower setpoint on a validated spray.
FAQ
What compressed air pressure does a stencil cleaning machine need?
It depends on the drive. The pneumatic CQ-C730 and CQ-C730S screen cleaners publish 0.4–0.6 MPa because the air motor is the load. The electric CQ-C740 publishes 0.45–0.7 MPa, and the CQ-C750 and CQ-C750S publish 0.5–0.8 MPa. Supply within the band printed on the model you ordered, not the band you used last time.
How much air does a dry ice blasting machine consume?
The three CHUANGQI dry-ice models publish 0.5–4.0 m³/min at 0.1–0.8 MPa, with pellet feed adjustable from 0.1 to 0.6 kg/min. Both ends of the flow band are published settings, so the figure your compressor sees follows the setting you run, not the model number alone.
Can one compressor line feed the whole cleaning room?
One line can reach the room; one unregulated pressure cannot serve it. The published inlet bands span 0.4–0.8 MPa across the wet and pneumatic families, with dry-ice cells adjustable from 0.1 MPa, and demand spans roughly 280 NL/min to 4,000 NL/min. Regulate at each machine and size the header on the sum of your simultaneous draws.
What water supply pressure does a pallet washer need?
The CQ-C756 fixture and pallet washer takes water at 0.1–0.3 MPa and air at 0.4–0.6 MPa, and sprays at 3–6 bar. Note the units: 3–6 bar is 0.3–0.6 MPa, so the spray and the air supply sit in the same range, while the water supply is a lower-pressure service.
If you are writing the utility sheet for a new cleaning room, send us your measured header pressure, flow and DI water figures and we will return a per-machine connection list with a quote within 24 hours. The comparison method for the machines themselves sits in our guide to comparing PCB cleaning machine specs, the pallet and carrier family is detailed on the CQ-C756 fixture and pallet washer page, and the inline water-cleaning family on the CQ-C9610 inline PCBA water cleaning machine page.