The AirTAC GR400-10T AirTAC Air Pressure Regulator NPT 3/8 in 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 for compressed air, built on the 400 size frame with 3/8 in NPT ports. It is the standard-type regulator with an adjustment range of 0.05-0.9 MPa (7-130 psi) and a maximum inlet pressure of 1.0 MPa (145 psi). This configuration carries an embedded square gauge scaled in psi, and a reverse/check valve (code K) is fitted so downstream pressure is held if the upstream supply drops. No mounting bracket is included with the J suffix, and the body is also panel-mountable. As a pure regulator, the GR400-10T does one job only: holding a stable, adjustable downstream pressure. It contains no filter, no bowl and no drain, so it is best paired with an upstream filter when the air line also needs water and particulate removal.
This is a genuine AirTAC part. The GR family spans the 200, 300, 400 and 600 sizes with port options from 1/8 in to 1 in, gauge scales in MPa, psi or bar, an optional low-pressure type limited to 0.4 MPa, and PT, G or NPT thread variants. Flow for this series is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GR400-10T AirTAC Air Pressure Regulator NPT 3/8 in |
|---|---|
| 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 | Supplied without bracket |
| Fluid | Compressed air |
|---|---|
| Max. working pressure | 1.0 MPa (145 psi) |
| Temperature range | -20 to +70 °C |
| Pressure gauge | Fitted — square, psi 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. |
|---|---|
| 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. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. C is round, F is square. |
| 2 | Gauge scale: psi. 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 · 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 |
On a workholding clamp circuit fed from a plant air main, the GR400-10T sets and holds the clamping pressure at the 3/8 in supply point, while the fitted check valve keeps the set pressure behind it if the main dips mid-cycle.
Feeding divertors, pushers and reject cylinders on a carton packaging line, this regulator gives operators a stable, gauge-monitored pressure setting at the machine drop so actuation behaviour stays repeatable through the shift.
Mounted in a robot cell's pneumatic panel, the GR400-10T regulates the supply to gripper and tool-change circuits, with the psi square gauge letting technicians verify setpoints during changeover without a separate instrument.
Start with the port step: the 400 size carries 3/8 in ports here, and larger sizes give larger ports and more flow, so match the frame to the air demand of the circuit rather than to the pipe alone. Set the adjustment window against your working pressure: this standard-type unit covers 0.05-0.9 MPa (7-130 psi); if your setpoint sits below that, the GR low-pressure type (L) covers up to 0.4 MPa. Choose the gauge scale to suit the shop floor - this unit ships with a square gauge in psi, and MPa or bar scales are available as options. The fitted reverse/check valve (K) is worth specifying wherever a momentary supply drop must not dump the downstream setting. Thread is NPT here; PT is the catalogue standard and G is also orderable - pick one and stay consistent with the rest of the manifold. Bracket is omitted on this code, so plan for panel mounting if a bracket is not added. One honest note on sizing: flow for the GR series is published as curves, not a single rated number, so send us your application details and we will confirm the datasheet figures 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-series flow as curves rather than a single rated figure, so we do not quote a flow number for this regulator. Tell us your line pressure, set pressure and the air demand of the connected equipment, and we will confirm the datasheet flow curve and check the 400 size against your application before you order.
Both are read straight from the model code. The K suffix means a reverse/check valve is fitted, so downstream pressure is retained if the upstream supply is interrupted. The J suffix means no mounting bracket is included - the GR body is also panel-mountable, and bracket-equipped variants are available in the series if you prefer surface mounting.
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.