The AirTAC GR40010F3T AirTAC Air Regulator NPT3/8, 400 Size 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 GR40010F3T is an AirTAC GR-series air pressure regulator: it does one job, holding your downstream pressure steady at the setting you choose. This is the size 400 unit with a 3/8 in NPT port, the standard (not low-pressure) type, and a square pressure gauge fitted and scaled in bar, so the set point can be read and adjusted directly at the unit. A mounting bracket is included and the GR body is also panel-mountable; no reverse/check valve is fitted in this configuration.
This is a genuine AirTAC part. The GR family runs from size 200 to 600 across ports from 1/8 to 1 in, with optional G (BSPP) or NPT threads, a low-pressure type (L, up to 0.4 MPa), an optional reverse/check valve (K), and gauge scales in MPa, psi or bar. Max inlet pressure is 1.0 MPa (145 psi), the regulation range is 0.05-0.9 MPa (7-130 psi), and the working temperature is -20 to 70 C. Flow is published as curves rather than a single rating, so ask us to confirm figures against your application.
| Model | GR40010F3T AirTAC Air Regulator NPT3/8, 400 Size |
|---|---|
| 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 — square, bar 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). |
| F | Gauge shape: Square. 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. |
| (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 a steady clamping pressure for a machine-tool fixture or jig, with the bar-scaled square gauge letting the operator verify the set point at the unit.
Regulate the air feeding cylinders on a packaging or cartoning conveyor so actuation speed and holding force stay consistent through the shift.
Hold a stable downstream pressure on the air circuit of a CNC machining centre or press, with the included bracket mounting the regulator at the machine.
Pick the GR size by the port and flow your line needs: this 400 unit steps up to a 3/8 in NPT port for circuits that have outgrown 1/4 in. Set the downstream pressure anywhere in the 0.05-0.9 MPa (7-130 psi) range; if your circuit runs below that, the L low-pressure type is the variant to ask about. Choose the gauge scale to suit the operator - this unit ships with a square gauge in bar, and MPa or psi scales are available. Thread is NPT here; PT is the AirTAC standard and G (BSPP) is also an orderable option. A reverse/check valve can be added (code K) if the circuit needs it, and a bracket is included for mounting.
One honest note on sizing: AirTAC publishes GR flow as curves, not a single rated figure, so we do not quote a flow number. Tell us your application and we will confirm the 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, not as a single rated number, so we do not quote a flow figure. Send us your application details and we will confirm the sizing and flow data from the datasheet on request.
The GR40010F3T comes with an embedded square gauge scaled in bar. External round gauges and MPa, psi or bar scales are catalogue options, so you can order the scale that matches your other gauges.
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.