Misting is a different problem from washing, which is why RCAM Series mist pumps exist. You are not trying to remove anything, you are trying to break water into droplets small enough to evaporate before they land. That takes consistent pressure and very little flow, the opposite of what a pressure washer pump is built for.

The RCAM series is AR’s answer: nine configurations from 0.25 to 2.0 GPM, all at 1,500 PSI, on an F8 flange.

The RCAM Series mist pumps we stock

Left-hand shaft versions are available across the range, marked SX: RCAM2G15E-F8-SX, RCAM1G15E-F8-SX, RCAM05G15E-F8-SX and RCAM025G15E-F8-SX, for mirrored installations.

Sizing by nozzle count

Misting systems are specified from the nozzles backwards. Count your nozzles, multiply by their rated flow, add margin, and that is the pump you need.

A typical 0.012 in misting nozzle at 1,000 PSI passes roughly 0.5 GPH. A hundred of them is about 0.8 GPM, which puts you on the 1.0 GPM model. That is the calculation, and it is why the range starts at a quarter of a gallon per minute: patio and greenhouse systems genuinely need that little.

Oversizing is not harmless. A pump much larger than the nozzle set spends its life in bypass, which heats the water and shortens seal life.

Why 1,500 PSI

Droplet size falls as pressure rises. Below about 800 PSI you get spray that wets surfaces; around 1,000 PSI and above you get a fog that evaporates in air, which is what actually cools without soaking anyone.

1,500 PSI gives headroom above that threshold so the system still fogs properly at the far end of a long line, where pressure has dropped.

RCAM mist pump applications

• Fogging and outdoor cooling: restaurant patios, greenhouses, event spaces
• Reverse osmosis systems: as the pressure stage in water purification
• Humidification: textile, printing and agricultural environments where air moisture is a process variable
• Dust suppression: construction, recycling and waste facilities
• Livestock cooling and greenhouse irrigation
• Industrial misting tunnels and specialty spraying

RCAM mist pump design notes

Brass head, compact and light, on an F8 flange so it bolts to a small motor face rather than needing a base and coupling. That makes it straightforward to integrate into an OEM assembly, which is what most of these end up in.

Two things matter more than the pump specification:

• Water quality. Misting nozzles have tiny orifices and they block. Filter the inlet finely, and on hard water expect to descale the line periodically.
• Continuous duty. These run for hours without stopping, so the crankcase oil and the seals are on a schedule even though the pump is barely working by pressure-washing standards.

Browse the mist unit range, or send your nozzle count and orifice size and you will get the right pump instead of an oversized one.