SPEEDAIRE
SPEEDAIRE 4ZL17 Pneumatic Oil Filter 1/4 NPT 6.5 cfm
Coalescing pneumatic oil filter with 1/4 NPT ports, 6.5 cfm flow, 150 psi rating and manual drain
- Coalescing filtration removes oil aerosols for cleaner air delivery
- 1/4 inch NPT female ports fit standard pneumatic lines
- 5 cfm maximum flow supports moderate air tool demand
- 150 psi pressure rating handles typical shop compressor output
- Polycarbonate bowl with manual drain allows easy maintenance checks
Miniature Coalescing Filter
The SPEEDAIRE 4ZL17 is a miniature pneumatic oil filter designed for compressed air systems. It removes oil aerosols and particulates through a coalescing element rated for 6.5 cfm maximum flow. The unit features a polycarbonate bowl with a manual drain and female 1/4 inch NPT connections on both inlet and outlet. Air flows left to right through the housing.
Upgrade From Basic Particulate Filters
This coalescing filter replaces standard particulate separators when oil removal is required downstream. The jump is worth it when pneumatic tools or processes demand cleaner air than a simple cyclone or sintered bronze element can provide. It handles up to 150 psi operating pressure and 125 degrees F maximum temperature. No differential pressure indicator is included for monitoring element saturation.
Compact Inline Installation
The filter measures 1 5/8 inches wide by 4 1/4 inches high, allowing direct mounting in tight piping runs. Female NPT ports on both ends simplify plumbing without extra fittings. The manual drain requires periodic operator attention to expel collected oil. Buyers needing automatic drainage or a visual service indicator should specify a different model.
Highlights
- Coalescing filtration removes oil aerosols for cleaner air delivery
- 1/4 inch NPT female ports fit standard pneumatic lines
- 5 cfm maximum flow supports moderate air tool demand
- 150 psi pressure rating handles typical shop compressor output
- Polycarbonate bowl with manual drain allows easy maintenance checks
Specifications
| Brand | SPEEDAIRE |
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Questions about this item
What thread size does the 1/4 NPT inlet need for mounting?
The filter uses a 1/4 inch NPT female thread on both inlet and outlet, so pipe or hose fittings must match that thread size and gender.
How is the coalescing filter installed and what step is often missed?
Install with airflow running left to right as marked, tighten the 1/4 NPT connections, then open the manual drain to clear any initial condensate before use.
When does the polycarbonate bowl or filter element need replacement?
Replace the bowl if cracks or clouding appear, and change the coalescing element when pressure drop across the filter rises noticeably or after the service interval for your compressor oil.
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