Products / Machine
Rotary Airlock Valve
Discharges collected powder out of the filter hopper without letting air in. A small machine that decides whether the whole circuit holds pressure.
Specification
Every figure, and where it comes from.
Values are taken from the company's own technical specification and cross-checked against its quotations. Where two documents disagree, both readings and the rule applied are stated in the row.
- Size
- 300 mmTechnical specification item 8
- Capacity
- As per standardTechnical specification item 8
- Drive
- 1 HP, chain drive — geared motor with VFDTechnical specification item 8
- Quantity
- 1 per mill, on the RPJ filterTechnical specification item 8
- Screw feeder valve
- 6 in dia, MS, chain drive with VFD, 1 per millTechnical specification item 2
The drawing
How it is built, and how it moves.
Drawn on the same drafting system as the rest of the set: five stroke weights by role, a 2 px grid, and motion derived from the machine's own kinematics rather than approximated.
How it works
The principle behind the specification.
What it actually does
The filter hopper is under suction and the line below it is not. Open a plain slide valve and air rushes up through the powder instead of powder falling out. A rotary airlock has vanes running in sealing contact with the housing bore, so there is never an open path between the two sides: pockets fill at the inlet, carry down one side, discharge at the outlet, and come back up empty. Product leaves and the pressure difference stays.
Why the VFD matters
Discharge rate is set by rotor speed. Too slow and the hopper backs up into the bags; too fast and the pockets pass part-empty, which wastes air across the seal. A drive on a variable-frequency drive lets the rate be trimmed to the plant rather than fixed at build.
Elsewhere in the line
What sits either side of it.
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Ask about the rotary airlock valve.
Quote requests, spares enquiries and technical questions all reach the same desk. We answer with a specification, not a brochure.