Prevost ALTO 4 Air Pressure Regulator — 3/4" & 1" FNPT, 7–145 PSI
The Prevost ALTO 4 air pressure regulator holds a steady downstream pressure on high-flow 3/4" and 1" lines. ALTO 4 is the large-body size in the Prevost ALTO air-preparation range, picking up where the smaller Prevost ATU regulators leave off at 1/2".
A relieving diaphragm design vents excess downstream pressure when you dial the setting back, so the regulator responds immediately instead of locking in the higher pressure. The knob locks by pushing down, and a 1/4" gauge port lets you mount a gauge on either side. The modular ALTO 4 body stacks with the matching ALTO 4 filter and lubricator to build a 3/4" or 1" FRL train.
Specifications
- Port sizes: 3/4" FNPT and 1" FNPT
- Flow rate: 177 CFM (3/4") / 212 CFM (1") at 87 psi, ΔP = 14 psi
- Adjustment range: 7 to 145 psi
- Regulator type: Relieving diaphragm, lockable knob
- Gauge port: 1/4" (gauge sold separately)
- Body: Aluminum alloy
- Series: Prevost ALTO 4 air treatment module
Available Variants & SKUs
| SKU | Port Size | Flow Rate |
|---|---|---|
| TR 204 | 3/4" FNPT | 177 CFM at 87 psi (ΔP = 14 psi) |
| TR 205 | 1" FNPT | 212 CFM at 87 psi (ΔP = 14 psi) |
Flow ratings are taken from the Prevost 2026 US price list. Need a filter and regulator in one body? See the Prevost ALTO 4 filter-regulator.
NOTE: Actual product may be different from pictured!
Financing Options
Financing Options
We offer Financing Through Many Different Avenues:
- Affirm is great for smaller purchases. You can do this during checkout.
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