Rotary Airlock Valve Dimensions & Measurement Guide
Aug 24, 2026|
View:180Check rotary airlock valve dimensions before selecting a new valve or replacing an existing rotary feeder. Use the measurement worksheet below to record flange connections, face-to-face height, shaft position and drive clearance.
For replacement projects, also provide photos, the nameplate, rotor pocket volume when available, material flowability, sealing requirements and the application: silo discharge, dust collection or pneumatic conveying. Similar dimensions do not guarantee the same operating performance.
Confirm the existing flange standard and obtain the selected FUWEI outline drawing before changing connected equipment.
Request a Valve Dimension Check — Send your measurements, photos, material, required capacity, bulk density, temperature and pressure difference.
Rotary Airlock Valve Dimension Measurement Worksheet
Use this worksheet to record the installation dimensions of an existing rotary airlock valve or to review the space available for a new rotary feeder. It is a measurement guide, not a universal model dimension schedule. Final dimensions must be confirmed against the selected FUWEI drawing.
| Measurement | What to record | Why it matters |
|---|---|---|
| Inlet flange | Outside dimensions, opening size, bolt-hole quantity, diameter and spacing | Confirms the connection to the silo, hopper or upstream equipment |
| Outlet flange | Outside dimensions, opening size and bolt pattern | Confirms the gravity discharge or conveying-line connection |
| Face-to-face height | Distance from the inlet flange face to the outlet flange face | Prevents installation-height mismatch |
| Body envelope | Maximum body width and depth | Checks interference with frames, guards and nearby equipment |
| Shaft centreline | Height and direction of the shaft relative to the flanges | Confirms drive alignment and replacement compatibility |
| Drive clearance | Motor, gearbox, coupling or chain-drive projection | Ensures adequate installation and maintenance access |
| Rotor information | Rotor diameter, length, pocket count and speed when known | Supports capacity and replacement checks |
| Operating data | Material, bulk density, capacity, temperature and pressure difference | Prevents selecting a valve from dimensions alone |
How to Use the Dimension Worksheet
Photograph the complete valve, nameplate, inlet, outlet and drive side.
Measure both flange openings and bolt patterns rather than quoting only the nominal pipe size.
Record overall height, shaft direction and the maximum available drive-side space.
Add the handled material and operating conditions before comparing a replacement model.
Request a confirmed outline drawing before manufacturing or changing connected equipment.
Rotary Airlock Valve Dimension FAQ
Are rotary airlock valve dimensions standardized?
Not completely. Nominal inlet size may be similar, but flange drilling, face-to-face height, shaft position, rotor length and drive layout can differ by manufacturer and model.
Can a replacement valve be selected from flange size alone?
No. Flange size must be checked together with capacity, bulk density, particle size, pressure difference, temperature, rotor clearance and available installation space.
What should I send FUWEI for a dimensional replacement check?
Send front, side and top photos, the nameplate, inlet and outlet measurements, bolt pattern, overall height, shaft direction, drive clearance, material data and required capacity.
Continue with the rotary airlock valve selection parameters, review the capacity calculation guide, or use the repair and replacement support page.
