The AirTAC GR400-15T AirTAC Air Pressure Regulator NPT1/2, Gauge is a genuine G-series air pressure regulator. It holds a stable downstream pressure over the range 0.05 - 0.9 MPa (7 - 130 psi) with PT1/2" ports, and ships with a pressure gauge. A regulator does not filter the air — put a GF filter upstream, or use a GFR filter regulator, when water and particulate must also be removed.
The GR400-15T is a genuine AirTAC GR-series air pressure regulator for compressed air, built for downstream pressure control on 1/2 in NPT-threaded lines. This configuration is the size 400 standard regulator with an external round pressure gauge scaled in bar, a built-in reverse (check) valve that holds the downstream setting when upstream supply is lost, and no mounting bracket, so it can be panel-mounted or lined up on the machine frame. Adjustment range is 0.05-0.9 MPa (7-130 psi) with a maximum inlet pressure of 1.0 MPa (145 psi), and the unit operates from -20 to 70 C, the widest temperature window in the G family.
This is a genuine AirTAC part from the GR400 size class, one of four sizes (200/300/400/600) that step up in port and flow capacity. Options across the series include different thread standards (PT standard, G and NPT to order), gauge styles and scales, a low-pressure type, and bracket variants. Flow is published as curves rather than a single rated figure, so we confirm the datasheet and sizing figures on request.
| Model | GR400-15T AirTAC Air Pressure Regulator NPT1/2, Gauge |
|---|---|
| Series | GR400 pressure regulator |
| Port size | PT1/2" (NPT thread) |
| Regulating range | 0.05 - 0.9 MPa (7 - 130 psi) |
| Pressure type | Standard type |
| Bracket | Supplied without bracket |
| Fluid | Compressed air |
|---|---|
| Max. working pressure | 1.0 MPa (145 psi) |
| Temperature range | -20 to +70 °C |
| Pressure gauge | Fitted — round, bar scale |
| Reflux valve | Fitted (reverse flow permitted) |
| Mounting | Panel mounting; optional fixing bracket |
Specifications follow the official AirTAC G-series air-preparation data. Note the GR temperature range is -20 to +70 °C, wider than the other G-series units. A regulator has no bowl and no filter element, so there is no filtering grade. Flow curves, weight and outline dimensions are not published in our data set — ask us and we will confirm from the factory datasheet.
| GR400 | G-series pressure regulator, 400 body — sets the port range. |
|---|---|
| 15 | Port size PT1/2". This body offers 10 = PT3/8", 15 = PT1/2". |
| (blank) | Standard type — 0.05 - 0.9 MPa (7 - 130 psi). Blank is standard, L is the low-pressure type. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 3 | Gauge scale: bar. 1 is MPa, 2 is psi, 3 is bar. |
| T | NPT thread. PT is the default; G is BSPP and T is NPT. |
| K | Reverse-flow (reflux) valve fitted. |
Field order is size, port, type, bracket, gauge, gauge shape, scale, thread, reflux — a blank position takes the default. Example: GR300-08LNK is a 300 body, PT1/4", low-pressure type, no gauge, with reflux valve.
A larger body carries a larger port and holds set pressure better as flow rises. AirTAC publishes flow only as curves, so size the body from your peak demand with headroom rather than from a single rated figure.
| This model | GR400 · PT1/2" · 0.05 - 0.9 MPa (7 - 130 psi) |
|---|---|
| One size down | GR300 |
| One size up | GR600 |
| Line order | Filter first, then regulator, then lubricator |
Drops the 1/2 in branch off a factory compressed-air ring main to the working pressure needed by the machines on that line, with the check valve holding the setting through supply dips.
Sets a stable supply pressure for the cylinders and air actuators that drive packaging, clamping and conveyor stop-and-lift stations on a production line.
Panel-mounted on an OEM machine's pneumatic manifold to give operators a bar-scaled setpoint for the machine's air circuit, isolated by the built-in reverse valve.
Size 400 with a 1/2 in port sits in the upper half of the GR range; step up to 600 or down to 300/200 depending on the flow your line needs, and confirm the step against the published flow curves before ordering. The trailing T sets the NPT thread; PT is the catalogue standard and G (BSPP) is available to order, so match your pipework. The C in the code selects the external round gauge with a bar scale; square embedded gauges and MPa/psi scales are the other choices if you want a different readout. The K code adds a reverse (check) valve, useful where a lost supply must not dump the set pressure, and J means no bracket is supplied, so plan for panel mounting. Ask us to confirm sizing against your application before you order.
Quick checklist
The reflux valve lets air flow back through the regulator, which is useful when downstream volume must vent quickly. A regulator does not remove water or particulate; that is the filter's job.
AirTAC publishes GR flow as curves rather than a single rated figure, so we do not quote a rated l/min or SCFM number. Send us your inlet pressure, set pressure and required flow, and we will confirm the datasheet curve and correct size for your application on request.
The C in the code selects the external round gauge scaled in bar, instead of the embedded square gauge; MPa and psi scales are also available. The K adds a reverse (check) valve, which keeps the downstream pressure at its setting if the upstream supply is interrupted. Both are decodable options on the GR series, not modifications.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity, thread type (PT / G / NPT), gauge scale and destination. We confirm price, availability and lead time — usually within 7-8 hours.