The AirTAC GR400-10T AirTAC Air Pressure Regulator 3/8in NPT 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 PT3/8" 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 GR400-10T is an AirTAC GR-series air pressure regulator in size 400 with 3/8 in NPT ports. It does one job only: reducing and holding downstream air pressure, adjustable across 0.05-0.9 MPa (7-130 psi) with a maximum inlet pressure of 1.0 MPa (145 psi). This configuration carries an external round pressure gauge scaled in MPa, and the standard (not low-pressure) regulator type. Operating temperature is -20 to 70 C, the widest range in the G family, and a mounting bracket is included; the GR body is also panel-mountable.
This is a genuine AirTAC part. The GR series spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 inch, and options include G (BSPP) or NPT threads in place of the PT standard, psi or bar gauge scales, a low-pressure type limited to 0.4 MPa, a reverse/check valve, or a gauge-less version. Flow figures are published as curves rather than a single rating, so ask us to confirm sizing against your application.
| Model | GR400-10T AirTAC Air Pressure Regulator 3/8in NPT |
|---|---|
| Series | GR400 pressure regulator |
| Port size | PT3/8" (NPT thread) |
| Regulating range | 0.05 - 0.9 MPa (7 - 130 psi) |
| Pressure type | Standard type |
| Bracket | Fixing bracket included |
| Fluid | Compressed air |
|---|---|
| Max. working pressure | 1.0 MPa (145 psi) |
| Temperature range | -20 to +70 °C |
| Pressure gauge | Fitted — round, MPa scale |
| Reflux valve | Not fitted |
| 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. |
|---|---|
| 10 | Port size PT3/8". 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. |
| (blank) | Fixing bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 1 | Gauge scale: MPa. 1 is MPa, 2 is psi, 3 is bar. |
| T | NPT thread. PT is the default; G is BSPP and T is NPT. |
| (blank) | No reverse-flow valve (the default). |
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 · PT3/8" · 0.05 - 0.9 MPa (7 - 130 psi) |
|---|---|
| One size down | GR300 |
| One size up | GR600 |
| Line order | Filter first, then regulator, then lubricator |
Set and hold a stable clamping pressure on a pneumatic press or fixture circuit, with the round MPa gauge giving the operator a direct reading of the set pressure at the machine.
Regulate the supply air feeding cylinders and actuators on a packaging or bottling line, keeping actuator speeds consistent as the header pressure fluctuates through the shift.
Drop main shop air to the pressure a CNC machining centre's pneumatic controls expect, panel-mounted next to the machine's air inlet using the included bracket.
Size 400 with 3/8 in ports sits in the upper-middle of the GR range; step up to size 600 for larger supply lines or down to 200/300 for compact circuits, matching the port to your main air line. The setting range here is 0.05-0.9 MPa (7-130 psi); if your circuit runs below 0.4 MPa, the L low-pressure type is the better decode. The fitted round gauge reads in MPa, but psi (scale 2) or bar (scale 3) versions can be specified. Thread is NPT on this code; PT is the catalogue standard and G (BSPP) is also orderable. A J-code version without bracket exists if you panel-mount.
Flow for the GR series is published as curves, not a single rated figure, so we do not quote a number here. Send us your line size and downstream demand and we will confirm sizing from the datasheet before you order.
Quick checklist
Without a reflux valve, air cannot flow back through the regulator — order the K option if reverse flow is required. A regulator does not remove water or particulate; that is the filter's job.
AirTAC publishes GR-series flow as curves rather than a single rated figure, so we do not quote a number. Tell us your line size and downstream air demand and we will confirm the sizing from the datasheet on request before you order.
Yes. The round gauge fitted to this code is scaled in MPa (scale 1), but the catalogue offers psi (scale 2) and bar (scale 3) gauge versions of the GR400. Specify the scale you want when ordering; the regulator's 0.05-0.9 MPa (7-130 psi) setting range is unchanged.
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.