Technical Support
How to Select a Rotary Airlock Valve
To recommend the right rotary airlock valve or rotary feeder, FUWEI needs to understand the material, process and working conditions. Complete selection information helps improve feeding stability, sealing performance and service life.
Quick Sizing Steps
Confirm material data: material name, particle size, bulk density, moisture, temperature and flowability.
Confirm required capacity: kg/h, t/h or m3/h for continuous discharge, dosing or airlock feeding.
Check pressure condition: gravity discharge, negative pressure conveying or positive pressure pneumatic conveying.
Select valve size and rotor speed: match rotor volume with capacity while keeping speed suitable for sealing and wear control.
Choose material and structure: carbon steel, stainless steel, wear-resistant coating, sanitary design or anti-stick treatment.
Please Provide the Following Information
Application purpose: quantitative discharge, full discharge, airlock sealing, dosing or continuous feeding.
Installation location: indoor or outdoor installation, available space and connection direction.
Conveying method: pneumatic conveying, negative-pressure conveying, positive-pressure conveying or gravity flow.
Capacity requirement: material flow rate per hour and whether the feeding amount is fixed or variable.
Material properties: material name, particle size, true density, bulk density, temperature, angle of repose, moisture content and viscosity.
Conveying gas and pressure: gas type and pressure difference between the upper and lower flanges.
Flange standard: flange shape, size, drilling standard and connection requirements.
Additional chamber: whether an acceleration chamber or extraction chamber is required.
Surface treatment: whether the inner cavity needs anti-stick, anti-corrosion, polishing, coating or other special treatment.
Motor and reducer: preferred brand, protection grade, explosion-proof level, voltage and frequency.
Painting color: specified color or FUWEI standard coating.
Capacity Calculation Reference
The theoretical discharge capacity can be estimated with the formula: G = 0.06 x V x n x Y x r x K.
G: discharge capacity, tons/hour
V: rotary valve volume, liters/revolution
n: rotary valve speed, rpm
Y: volumetric efficiency, usually 0.7-0.8 for granules and 0.5-0.6 for powders
r: material bulk density, tons/m3
K: correction factor, usually 0.7-0.8
If you are not sure which model to choose, send your process data to FUWEI. Our team can help match the suitable rotary valve type, material and specification.
Sizing Support for Replacement and Rebuild Projects
If an existing rotary airlock valve has air leakage, unstable discharge or worn rotor clearance, sizing should be checked before repair or replacement. FUWEI can review the current valve dimensions, rotor volume, flange size, speed, bulk density and pressure difference to recommend whether repair, rebuild or a new rotary valve is more suitable.
Related guide: Rotary Airlock Valve Repair, Rebuild & Troubleshooting Support.
Rotary Valve Size, Capacity and Replacement Data
For buyers comparing a rotary airlock valve size chart or rotary feeder capacity calculator, the most important data is rotor volume, speed, bulk density, filling efficiency, flange dimensions and pressure difference. FUWEI can use these parameters to recommend a suitable rotary valve model or check whether an existing valve can be replaced by a more efficient airlock feeder.
| Buyer Question | Data to Confirm |
|---|---|
| What rotary valve size do I need? | Capacity, bulk density, rotor volume, speed and required filling rate. |
| Can FUWEI match an old valve? | Existing flange dimensions, inlet/outlet size, shaft direction, motor power and installation space. |
| When should I select stainless steel? | Food, pharmaceutical, chemical, corrosion-sensitive or easy-cleaning applications. |
If the existing valve has leakage, jamming or unstable discharge, review the Rotary Airlock Valve Repair & Rebuild Service before final selection.
Related Rotary Valve Selection Guides
If you are comparing rotary valve dimensions, capacity, flange size or replacement data, these pages can help confirm whether the existing valve should be selected again, repaired or rebuilt.
Rotary Airlock Valve Troubleshooting & Maintenance - check leakage, jamming, abnormal noise and capacity drop.
Rotary Airlock Valve Repair & Rebuild Support - compare repair, rebuild and replacement options.
FUWEI Rotary Valve Product Center - view rotary airlock valve models and customized options.
Capacity, Dimensions and Selection Support
Use this page as a practical rotary airlock valve sizing calculator checklist for powder handling, silo discharge and pneumatic conveying systems. Correct rotary feeder sizing should compare capacity, bulk density, valve dimensions, rotor volume, rotor speed, pressure difference and material flowability before selecting the final model.
Sizing Data and Units
| Sizing Item | Typical Unit | Why It Matters |
|---|---|---|
| Required capacity | kg/h, t/h, m3/h | Determines valve size, rotor volume and motor load. |
| Bulk density | kg/m3 | Converts volume capacity into mass capacity for rotary feeder calculation. |
| Rotor speed and filling efficiency | rpm, % | Controls feeding stability, wear level and leakage risk. |
| Pressure difference | bar, kPa | Affects airlock sealing, leakage control and rotor clearance design. |
| Inlet/outlet dimensions | DN, mm, drawing | Ensures flange matching, installation layout and process connection. |
| Material temperature | deg C | Clearance, bearing and sealing design |
Rotary Feeder Sizing Formula Reference
Use the capacity formula and symbol definitions above. For sticky, abrasive, high-temperature or positive-pressure conveying materials, FUWEI will adjust the recommended rotary airlock valve dimensions and clearance according to the working condition.
Related Selection Support
For model selection, you can also review maintenance and troubleshooting guidance, compare cast iron rotary airlock feeders, check stainless steel rotary valves, or browse all FUWEI rotary valve products.
Selection FAQ
Can FUWEI replace an old rotary airlock valve? Yes. Send photos, flange drawings, rotor diameter, shaft direction, motor power and installation space, and FUWEI can check a compatible replacement model.
How do I size a rotary airlock valve?
Start with required capacity, bulk density, rotor volume, rotor speed, filling efficiency, pressure difference and material flowability. FUWEI can recommend a practical valve size after receiving these data.
What information is needed for a rotary airlock valve sizing calculator?
A sizing calculation normally needs capacity in kg/h or t/h, bulk density, material temperature, pressure condition, inlet and outlet dimensions, conveying method and required valve material.
Can FUWEI customize rotary airlock valve dimensions?
Yes. FUWEI supports OEM and ODM dimensions, including round flange, square flange, rotor clearance, material contact parts, coating and motor configuration.
Rotary Valve Technical Guide Center
For more selection and troubleshooting topics, visit the FUWEI technical guide center.
How to Select a Rotary Airlock Valve
To recommend the right rotary airlock valve or rotary feeder, FUWEI needs to understand the material, process and working conditions. Complete selection information helps improve feeding stability, sealing performance and service life.
Quick Sizing Steps
Confirm material data: material name, particle size, bulk density, moisture, temperature and flowability.
Confirm required capacity: kg/h, t/h or m3/h for continuous discharge, dosing or airlock feeding.
Check pressure condition: gravity discharge, negative pressure conveying or positive pressure pneumatic conveying.
Select valve size and rotor speed: match rotor volume with capacity while keeping speed suitable for sealing and wear control.
Choose material and structure: carbon steel, stainless steel, wear-resistant coating, sanitary design or anti-stick treatment.
Please Provide the Following Information
Application purpose: quantitative discharge, full discharge, airlock sealing, dosing or continuous feeding.
Installation location: indoor or outdoor installation, available space and connection direction.
Conveying method: pneumatic conveying, negative-pressure conveying, positive-pressure conveying or gravity flow.
Capacity requirement: material flow rate per hour and whether the feeding amount is fixed or variable.
Material properties: material name, particle size, true density, bulk density, temperature, angle of repose, moisture content and viscosity.
Conveying gas and pressure: gas type and pressure difference between the upper and lower flanges.
Flange standard: flange shape, size, drilling standard and connection requirements.
Additional chamber: whether an acceleration chamber or extraction chamber is required.
Surface treatment: whether the inner cavity needs anti-stick, anti-corrosion, polishing, coating or other special treatment.
Motor and reducer: preferred brand, protection grade, explosion-proof level, voltage and frequency.
Painting color: specified color or FUWEI standard coating.
Capacity Calculation Reference
The theoretical discharge capacity can be estimated with the formula: G = 0.06 x V x n x Y x r x K.
G: discharge capacity, tons/hour
V: rotary valve volume, liters/revolution
n: rotary valve speed, rpm
Y: volumetric efficiency, usually 0.7-0.8 for granules and 0.5-0.6 for powders
r: material bulk density, tons/m3
K: correction factor, usually 0.7-0.8
If you are not sure which model to choose, send your process data to FUWEI. Our team can help match the suitable rotary valve type, material and specification.
Sizing Support for Replacement and Rebuild Projects
If an existing rotary airlock valve has air leakage, unstable discharge or worn rotor clearance, sizing should be checked before repair or replacement. FUWEI can review the current valve dimensions, rotor volume, flange size, speed, bulk density and pressure difference to recommend whether repair, rebuild or a new rotary valve is more suitable.
Related guide: Rotary Airlock Valve Repair, Rebuild & Troubleshooting Support.
Rotary Valve Size, Capacity and Replacement Data
For buyers comparing a rotary airlock valve size chart or rotary feeder capacity calculator, the most important data is rotor volume, speed, bulk density, filling efficiency, flange dimensions and pressure difference. FUWEI can use these parameters to recommend a suitable rotary valve model or check whether an existing valve can be replaced by a more efficient airlock feeder.
| Buyer Question | Data to Confirm |
|---|---|
| What rotary valve size do I need? | Capacity, bulk density, rotor volume, speed and required filling rate. |
| Can FUWEI match an old valve? | Existing flange dimensions, inlet/outlet size, shaft direction, motor power and installation space. |
| When should I select stainless steel? | Food, pharmaceutical, chemical, corrosion-sensitive or easy-cleaning applications. |
If the existing valve has leakage, jamming or unstable discharge, review the Rotary Airlock Valve Repair & Rebuild Service before final selection.
Related Rotary Valve Selection Guides
If you are comparing rotary valve dimensions, capacity, flange size or replacement data, these pages can help confirm whether the existing valve should be selected again, repaired or rebuilt.
Rotary Airlock Valve Troubleshooting & Maintenance - check leakage, jamming, abnormal noise and capacity drop.
Rotary Airlock Valve Repair & Rebuild Support - compare repair, rebuild and replacement options.
FUWEI Rotary Valve Product Center - view rotary airlock valve models and customized options.
Capacity, Dimensions and Selection Support
Use this page as a practical rotary airlock valve sizing calculator checklist for powder handling, silo discharge and pneumatic conveying systems. Correct rotary feeder sizing should compare capacity, bulk density, valve dimensions, rotor volume, rotor speed, pressure difference and material flowability before selecting the final model.
Sizing Data and Units
| Sizing Item | Typical Unit | Why It Matters |
|---|---|---|
| Required capacity | kg/h, t/h, m3/h | Determines valve size, rotor volume and motor load. |
| Bulk density | kg/m3 | Converts volume capacity into mass capacity for rotary feeder calculation. |
| Rotor speed and filling efficiency | rpm, % | Controls feeding stability, wear level and leakage risk. |
| Pressure difference | bar, kPa | Affects airlock sealing, leakage control and rotor clearance design. |
| Inlet/outlet dimensions | DN, mm, drawing | Ensures flange matching, installation layout and process connection. |
| Material temperature | deg C | Clearance, bearing and sealing design |
Rotary Feeder Sizing Formula Reference
Use the capacity formula and symbol definitions above. For sticky, abrasive, high-temperature or positive-pressure conveying materials, FUWEI will adjust the recommended rotary airlock valve dimensions and clearance according to the working condition.
Related Selection Support
For model selection, you can also review maintenance and troubleshooting guidance, compare cast iron rotary airlock feeders, check stainless steel rotary valves, or browse all FUWEI rotary valve products.
Selection FAQ
Can FUWEI replace an old rotary airlock valve? Yes. Send photos, flange drawings, rotor diameter, shaft direction, motor power and installation space, and FUWEI can check a compatible replacement model.
How do I size a rotary airlock valve?
Start with required capacity, bulk density, rotor volume, rotor speed, filling efficiency, pressure difference and material flowability. FUWEI can recommend a practical valve size after receiving these data.
What information is needed for a rotary airlock valve sizing calculator?
A sizing calculation normally needs capacity in kg/h or t/h, bulk density, material temperature, pressure condition, inlet and outlet dimensions, conveying method and required valve material.
Can FUWEI customize rotary airlock valve dimensions?
Yes. FUWEI supports OEM and ODM dimensions, including round flange, square flange, rotor clearance, material contact parts, coating and motor configuration.
Rotary Valve Technical Guide Center
For more selection and troubleshooting topics, visit the FUWEI technical guide center.
