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White cylindrical coalescing filter element with microglass media and metal end caps

SPEEDAIRE

SPEEDAIRE 4GPJ1 Coalescing Filter Element 1 Micron 500 CFM

SKU CH-2XFC-DTNJ2

A coalescing filter element rated at 1 micron with a 500 cfm flow capacity for oil and water removal

  • 1 micron rating removes fine oil and water aerosols
  • 500 cfm maximum flow suits high-demand compressed air systems
  • Microglass media provides coalescing efficiency for cleaner air output
  • ISO 8573 compliance supports air quality standards
  • Compatible with Grainger part numbers 35GN71, 35GN75, 4GNU6, 4GPA8

1 Micron Coalescing Element

This SPEEDAIRE filter element removes oil and water aerosols from compressed air lines down to a 1 micron rating. It uses microglass media and supports a maximum flow rate of 500 cfm for general purpose pneumatic systems. The element meets ISO 8573 standards for compressed air purity. It replaces Grainger part numbers 35GN71, 35GN75, 4GNU6 and 4GPA8.

Thermals Noise and Power Draw

As a passive filtration component the element generates no heat, noise or electrical power draw during normal operation. Pressure drop across the microglass media determines the energy cost of pushing air through the housing. The 500 cfm rating indicates the flow capacity before differential pressure rises significantly. No moving parts or electrical connections are present.

Sustained Load Behaviour

Under continuous flow the coalescing media progressively captures liquid contaminants which increases differential pressure over time. The 1 micron rating is maintained while the element loads with oil and water until saturation requires replacement. ISO 8573 compliance applies while the element operates within its service life. California Proposition 65 warnings note chemical exposure risks during handling.

Highlights

  • 1 micron rating removes fine oil and water aerosols
  • 500 cfm maximum flow suits high-demand compressed air systems
  • Microglass media provides coalescing efficiency for cleaner air output
  • ISO 8573 compliance supports air quality standards
  • Compatible with Grainger part numbers 35GN71, 35GN75, 4GNU6, 4GPA8

Specifications

BrandSPEEDAIRE

Questions about this item

How is the SPEEDAIRE 4GPJ1 coalescing filter element installed, and what step is often missed?

Shut off and depressurise the system, remove the housing bowl, slide the old element out, insert the new microglass element with the flow arrow pointing downstream, reinstall the bowl and torque to the housing specification, then slowly repressurise and check for leaks.

What maintenance or replacement will the SPEEDAIRE 4GPJ1 filter element need later?

Replace the element when the pressure drop across it reaches the housing indicator limit or at the interval set by your compressor manufacturer; the microglass media cannot be cleaned or regenerated.

What limit appears first on the SPEEDAIRE 4GPJ1 element during sustained 500 cfm operation?

The pressure differential across the 1‑micron microglass media rises as oil and water aerosols load the fibres, eventually hitting the housing’s change‑out threshold and requiring element replacement.

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