SMC AR20-N02H-NZ-D Regulator, 1/4" NPT, Non-Relieving, Panel Mount, No Gauge
SMC
$15.65
The SMC AR20-N02H-NZ-D is a size 20 modular air regulator with 1/4" NPT ports, a non-relieving exhaust mechanism, and a set nut for panel fitting. It ships without a pressure gauge, uses the standard 0.05 to 0.85 MPa setting range (approximately 7 to 123 psi), and reduces and holds downstream air pressure at a stable setpoint as the pressure-control stage in a modular F.R.L. air preparation station.
This is the current AR-D generation body. The included set nut lets it panel-mount directly, and the downward adjustment knob is easy to hold when unlocked. Because it is a non-relieving type, it does not vent downstream air to atmosphere when the setpoint is lowered, so it suits dead-end and held-pressure circuits where exhaust venting is undesirable. The label reads in psi and °F for North American service.
Replacing a legacy unit? The AR20-N02H-NZ-D is a direct, drop-in replacement for the SMC AR20-N02H-NZ-B. See crossover details below.
Key Specifications
| Model | AR20-N02H-NZ-D |
| Type | Modular air regulator |
| Series | AR-D (D-series modular) |
| Body Size | 20 |
| Port Size | 1/4" NPT |
| Pressure Gauge | Without gauge |
| Mounting | With set nut for panel fitting |
| Set Pressure Range | 0.05 to 0.85 MPa (approx. 7 to 123 psi) |
| Exhaust Mechanism | Non-relieving type |
| Max Operating Pressure | 1.0 MPa (145 psi) |
| Backflow Function | Without backflow function |
| Flow Direction | Left to right |
| Knob | Downward |
| Unit Label | psi, °F |
Proof pressure and temperature ranges follow the standard AR-D series datasheet. Confirm exact values against the SMC datasheet for your application.
Part Number Breakdown: AR20-N02H-NZ-D
| AR | Modular air regulator |
| 20 | Body size 20 |
| N | NPT thread type |
| 02 | 1/4" port size |
| H | Without mounting option; with set nut for panel fitting (no gauge) |
| N | Non-relieving type exhaust mechanism |
| Z | Unit label psi, °F |
| D | D-series modular body (current generation) |
Typical Applications
- Setting and holding stable downstream pressure in a modular F.R.L. air preparation station
- Panel-mounted regulation using the included set nut, for operator panels and enclosure fronts
- Dead-end and held-pressure circuits where a non-relieving regulator avoids venting air to atmosphere
- Feeding regulated air to pneumatic valves, actuators, and tools at a set inlet pressure
Maintenance Parts
| Valve Assembly | AR24P-060AS |
| Diaphragm Assembly | AR24P-150AS-N |
| Set Nut | AR23P-260S |
Replacing an AR20-N02H-NZ-B
The AR20-N02H-NZ-D is the current AR-D generation of this regulator, superseding the legacy AR20-N02H-NZ-B. SMC maintains panel-mount interchangeability across the generations: the panel mounting pitch carries over, and brackets and set nuts are common to the existing and new products.
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Legacy Part
AR20-N02H-NZ-B
Prior "-B" generation
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→ |
Current Replacement
AR20-N02H-NZ-D
Current AR-D body
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The connection, configuration, and mounting all carry over, so it drops into an existing AR20-N02H-NZ-B installation without rework:
- Same 1/4" NPT connection and left-to-right flow direction
- Interchangeable panel-mount pitch; brackets and set nuts common to both
- Same non-relieving exhaust mechanism and 0.05 to 0.85 MPa setting range
- Same no-gauge, panel-fitting configuration and psi / °F labeling
Note: valve, diaphragm, and set-nut service parts are listed above. The diaphragm assembly for this non-relieving unit is the AR24P-150AS-N. If you are transitioning a fleet of older units, standardize your spares inventory on the current AR-D maintenance parts going forward.
Frequently Asked Questions
What does the AR20-N02H-NZ-D do?
It is a modular air regulator. It reduces incoming compressed air to a stable, adjustable downstream pressure and holds it at the setpoint. This configuration is non-relieving and ships without a gauge, with a set nut for panel mounting.
What does "non-relieving" mean?
A non-relieving regulator does not vent downstream air to atmosphere when the setpoint is lowered or when downstream pressure rises above the setting. The trapped pressure bleeds off only through downstream demand. This suits dead-end circuits where venting is undesirable, and differs from a relieving regulator, which self-vents the excess.
Does it include a pressure gauge?
No. This configuration ships without a gauge. It does include a set nut for panel fitting.
What is the pressure setting range?
The standard setting range is 0.05 to 0.85 MPa, roughly 7 to 123 psi, with a maximum operating pressure of 1.0 MPa (145 psi).
Is the AR20-N02H-NZ-D a direct replacement for the AR20-N02H-NZ-B?
Yes. It is the current AR-D generation that supersedes the legacy AR20-N02H-NZ-B. The panel-mount pitch is interchangeable and the brackets and set nuts are common to both, so it drops into an existing installation without rework.
The SMC AR20-N02H-NZ-D is distributed by Automation Distribution, an authorized SMC distributor. For application help, cross-references from legacy AR part numbers, or quantity pricing, contact our team at 1-888-600-3080.
