SPEEDAIRE
SPEEDAIRE 4ZK91 Filter-Regulator 1/2" NPT 120 cfm 40 micron
Combines 40-micron particulate filtration and pressure regulation in a 1/2" NPT aluminium body rated for 120 cfm and 150 psi
- High flow capacity with 120 cfm maximum rate
- Fine particulate removal at 40 micron filter rating
- Durable aluminum body withstands 150 psi operating pressure
- Convenient top-mounted knob adjustment for easy pressure control
- Ready to install with 1/2 inch NPT inlet connection
1/2" NPT Filter-Regulator
The SPEEDAIRE 4ZK91 combines a particulate filter and regulator in a single body for compressed-air lines. Its aluminium housing carries a 1/2 inch NPT inlet and delivers up to 120 cfm at a 40 micron rating. The unit is new and rated for 150 psi maximum operating pressure. Adjustment is via a reinforced nylon knob on top with left-to-right flow.
Replaces Separate Filter and Regulator
Installing this combination unit removes the need for two discrete components and the extra fittings between them. The jump is worth it when bench space or piping length is limited and a single 1/2" NPT connection point simplifies the layout. Manual drain and polycarbonate bowl with guard keep maintenance straightforward.
150 psi and 40 Micron Limits
The 150 psi ceiling restricts use to shop-air systems that stay below that pressure. A 40 micron element stops coarse debris but passes finer oil mist or water vapour, so downstream tools needing cleaner air will need additional filtration. The polycarbonate bowl requires compatible lubricants and protection from solvents.
Highlights
- High flow capacity with 120 cfm maximum rate
- Fine particulate removal at 40 micron filter rating
- Durable aluminum body withstands 150 psi operating pressure
- Convenient top-mounted knob adjustment for easy pressure control
- Ready to install with 1/2 inch NPT inlet connection
Specifications
| Brand | SPEEDAIRE |
|---|
Questions about this item
Will the 1/2 in NPT inlet thread directly into my existing airline?
Yes, the unit has a 1/2 in NPT inlet that mates with standard 1/2 in NPT fittings; use thread sealant and tighten to the fitting manufacturer's torque spec.
Which way must the air flow through the body during installation?
Air must travel left to right as marked on the housing; installing it backwards blocks regulation and filtration.
How often should I drain the polycarbonate bowl with its manual drain?
Open the manual drain daily or whenever condensate reaches the lower sight level to prevent water carry-over into downstream tools.
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