SPEEDAIRE
SPEEDAIRE 4ZL34 Coalescing Filter 3/8 NPT 150 psi 2.68 in
Coalescing filter removes oil aerosols at 20 cfm with 150 psi rating and 3/8 NPT ports
- Coalescing filtration removes oil aerosols for cleaner air supply
- 3/8 in NPT female ports fit standard pneumatic plumbing
- 150 psi maximum operating pressure handles demanding compressed-air systems
- 20 cfm flow capacity supports intermediate-duty tools and equipment
- Manual drain simplifies maintenance without automatic components
3/8 NPT Coalescing Filter
The SPEEDAIRE 4ZL34 is a coalescing filter designed for compressed-air systems that use a 3/8 inch NPT connection. It removes oil aerosols and fine particulates from the air stream to protect downstream pneumatic tools and equipment. The unit is rated for a maximum operating pressure of 150 psi and a maximum flow rate of 20 cfm. It suits maintenance teams and machine operators who need clean, dry air at the point of use.
Thermals and Pressure Drop
The filter housing is built from polycarbonate and rated for a maximum operating temperature of 125 degrees F. Air flows left to right through the element, creating a pressure drop that varies with flow rate and element condition. No differential pressure indicator is included, so the element should be inspected on a regular schedule. The manual drain allows accumulated condensate to be removed without shutting down the supply line.
Bowl, Drain and Mounting
A polycarbonate bowl lets the operator see the fluid level at a glance, and the manual drain valve simplifies routine emptying. Female NPT threads on both inlet and outlet accept standard 3/8 inch fittings without adapters. The overall width of 2.68 inches and height of 8 1/2 inches fit the Intermediate Duty series envelope for panel or bracket mounting. California Proposition 65 warnings apply to chemicals in the product materials.
Highlights
- Coalescing filtration removes oil aerosols for cleaner air supply
- 3/8 in NPT female ports fit standard pneumatic plumbing
- 150 psi maximum operating pressure handles demanding compressed-air systems
- 20 cfm flow capacity supports intermediate-duty tools and equipment
- Manual drain simplifies maintenance without automatic components
Specifications
| Brand | SPEEDAIRE |
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Questions about this item
How do I install the 3/8 NPT coalescing filter and what step is often missed?
Connect the 3/8 in NPT female ports with thread sealant, ensure left-to-right airflow matches the arrow, and do not forget to close the manual drain valve before pressurising the line.
What maintenance will the polycarbonate bowl and coalescing element need later?
Open the manual drain daily to remove collected oil and water, and replace the coalescing cartridge when pressure drop across the filter becomes excessive.
What limit appears first during continuous operation at the 20 cfm rating?
The 150 psi maximum operating pressure or the 125 °F temperature ceiling will be reached before the 20 cfm flow capacity is exceeded.
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