Components — rotary valves
Rotary valves
and airlocks.
The component every pneumatic system depends on: powder passes down, pressure stays put.
In brief
A rotary valve (rotary airlock) meters powder through a multi-vane rotor turning in a close-tolerance housing — material passes from hopper to convey line while the vanes maintain the pressure differential. It is simultaneously the feeder, the airlock and, in classified plants, an ATEX-certified explosion isolation device.
In detail
How it works.
Every pocket of the rotor carries a measured volume, so valve speed is feed rate — the metering device and the airlock in one casting. Tolerances decide performance: leakage air rises sharply with wear, which is why quality valves are machined, not just cast.
In dust-zoned plants a certified rotary valve doubles as explosion isolation, preventing flame propagation between vessels — one of the quiet reasons component quality matters to compliance, not just uptime.
- Duties
- Convey-line feeding · hopper discharge metering · airlock
- Formats
- Drop-through and blow-through, cast and fabricated
- Options
- Quick-clean rail-out rotors for hygiene duties
- Compliance
- ATEX-certified explosion isolation variants
Common questions
Frequently asked questions.
- How does a rotary airlock valve work?
- A multi-vane rotor turns inside a machined housing. Each pocket fills with powder at the top inlet, carries it around, and discharges at the bottom — while at every rotor position at least one vane seals inlet from outlet, holding the pressure difference between hopper and convey line.
Related
Related pages.
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Talk to an engineer.
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