AIRLOCKS

Progressive Products Inc. manufactures high-precision airlocks designed for reliable performance in pneumatic conveying systems. Our airlocks are available in three sizes and four configurations to accommodate a wide range of operating conditions, including standard construction, mildly abrasive service, corrosion-resistant service, and moderate abrasive service. Our smallest 8” airlock features tight tolerances, with end clearances of .004”–.005” and diameter clearances of .003”–.005”, ensuring efficient material transfer and minimal air loss.

Each airlock is engineered with outboard bearings and seals, rotors with relieved tips and sides, and tapped endplates for ease of installation and long-term durability. The standard compression-type seal is maintenance-free and requires no field adjustment, while optional T-seals are available for superior performance in severe operating environments.

• No field adjustments
• Tight tolerances
• Maintenance-free for the life of the seal
• Connect to many types of conveying equipment
• Very reliable

• Tightest tolerances – smallest valve (8”) has .004”-.005” end clearances and .003”-.005” diameter clearances
• Holds at least a 20 PSI pressure differential
• Configurations for standard, mildly abrasive, corrosion-resistant, and moderately abrasive services available
• Cast iron housing
• Three-sided rotor relief for better revolution accuracy and less wear
• Outboard bearings that remain free of material
• Standard seal is a maintenance-free compression-type seal that requires no field adjustments
• Optional Teflon seal for extra-long life
• T-seals available for severe operating conditions
• Squeeze Lock bearing for easy servicing
• Oversized rotor shaft to prevent twisting
• Air-purge ready
• Wide range of options and accessories available

• Silo emptying
• Cyclone discharging
• Dust collection
• Dosage control, mixing, and batching
• Conveyor feeding or discharge
• Bulk solid filling

Suitable for any dry bulk material, including:

• Abrasive dust
• Ash
• Cement
• Chemicals
• Grain
• Kibble
• Particulate foods
• Plastics
• Sawdust