SPEEDAIRE
SPEEDAIRE 4GNL7 condensate separator 525 CFM 1-1/2 NPT
Removes moisture from compressed-air lines at up to 525 CFM through 1-1/2 NPT ports with an automatic drain
- Removes moisture automatically with included automatic drain
- Handles up to 549 cfm maximum flow rate
- Operates up to 235 psi maximum pressure
- Works from 35 °F minimum temperature
- Aluminium body resists corrosion in compressed air systems
525 CFM Compressed-Air Separator
The SPEEDAIRE 4GNL7 is an automatic condensate separator rated for 525 CFM maximum flow with 1-1/2 NPT inlet and outlet. It removes moisture from compressed-air lines in industrial and automotive workshops where dry air protects tools and finishes. The aluminium body handles up to 235 psi operating pressure and temperatures down to 35 degrees F. Buyers who need oil removal or sub-micron filtration should look elsewhere.
Upgrade from Manual Drain Traps
This unit replaces manual drain valves or basic cyclone separators that require daily attention. The automatic drain ejects collected condensate without operator intervention, reducing downtime and preventing water carry-over during peak demand. The step up is worth it when compressed-air volume reaches 350 CFM at 100 psi and consistent moisture removal becomes critical for paint booths or CNC equipment. Systems that rarely exceed light intermittent use will not see a payback.
Direct Pipe Installation
Thread the 1-1/2 NPT connections into existing piping using standard pipe sealant; the 4-3/4 inch outside diameter and 5 inch overall length fit most header layouts without re-fabrication. The automatic drain mechanism can stick if inlet air carries heavy rust scale or compressor oil, so a coarse upstream filter is advisable. Verify that system pressure stays above the drain’s minimum actuation threshold or condensate will accumulate in the bowl.
Highlights
- Removes moisture automatically with included automatic drain
- Handles up to 549 cfm maximum flow rate
- Operates up to 235 psi maximum pressure
- Works from 35 °F minimum temperature
- Aluminium body resists corrosion in compressed air systems
Specifications
| Brand | SPEEDAIRE |
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Questions about this item
What size NPT thread does the 1-1/2 inch inlet and outlet require for piping?
Both the air inlet and outlet use 1-1/2 inch NPT threads, so matching pipe fittings must be the same size and thread type.
How is the automatic drain installed, and what step is often missed?
The separator includes an automatic drain; the step often missed is ensuring the drain line is routed downward without traps so condensate can exit by gravity.
When should the internal filter element be replaced to maintain moisture removal at 525 CFM?
Replace the filter element when pressure drop across the separator rises noticeably or at the interval recommended in the service manual for continuous 525 CFM operation.
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