AirTAC GR400-10 Pressure Regulator (GR40010C3K)
The AirTAC AirTAC GR400-10 Pressure Regulator (GR40010C3K) 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.
- TypePressure regulator
- Port sizePT3/8"
- Regulating range0.05 - 0.9 MPa (7 - 130 psi)
- Pressure typeStandard type
- Pressure gaugeFitted
- Reflux valveFitted
- ThreadPT
- BracketFixing bracket included
About the AirTAC GR400-10 Pressure Regulator (GR40010C3K)
The GR400-10C3K is an AirTAC G-series air pressure regulator: regulation only, with no filter bowl and no lubricator. This size 400 unit has a 3/8 in PT port as standard, a maximum working (inlet) pressure of 1.0 MPa (145 psi) and an adjustment range of 0.05-0.9 MPa (7-130 psi). The C3 code adds an external round pressure gauge reading in bar, and the K code means a reverse/check valve is fitted. A mounting bracket is included and the GR body is also panel-mountable. Operating temperature is -20 to 70 C, non-freezing; the medium is compressed air only.
This is a genuine AirTAC part. GR regulators come in sizes 200, 300, 400 and 600 with ports from 1/8 to 1 inch, in PT, G (BSPP) or NPT thread, with or without the K check valve, and with square or round gauges in MPa, psi or bar scales. Regulator flow is published as characteristic curves rather than a single rated figure, so ask us and we will confirm the datasheet and sizing for your application on request.
AirTAC GR400-10 Pressure Regulator (GR40010C3K) Technical Specifications
| Model | AirTAC GR400-10 Pressure Regulator (GR40010C3K) |
|---|---|
| Series | GR400 pressure regulator |
| Port size | PT3/8" (PT 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, 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.
Model Code: AirTAC GR400-10 Pressure Regulator (GR40010C3K)
| 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. |
| 3 | Gauge scale: bar. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | PT 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.
Size Class
- GR200PT1/8" - PT1/4"
- GR300PT1/4" - PT1/2"
- GR400PT3/8" - PT1/2"
- GR600PT3/4" - PT1"
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 |
Where the AirTAC GR400-10 Pressure Regulator (GR40010C3K) Is Used
Pneumatic press cylinder
Regulate the working pressure of a pneumatic press or stamping cylinder, with the fitted check valve handling reverse flow in the line.
Actuated process valves
Supply quarter-turn pneumatic actuators on a process line with a stable, adjustable pressure set locally at each valve station.
Fixture clamping on weld cells
Hold a consistent clamp pressure on robotic welding fixtures so part seating does not drift with fluctuations in the plant air main.
Is the AirTAC GR400-10 Pressure Regulator (GR40010C3K) the Right Regulator?
Pick the size (200/300/400/600) and port (1/8 to 1 in) that match your piping and the flow curve of the circuit; the 400 body with 3/8 in PT ports is the mid-range GR step. This C3K build carries an external round gauge in bar and a built-in reverse/check valve - choose the non-K build if you do not need the valve. Thread is PT as the standard, with G (BSPP) and NPT available to order; a bracket is included and panel mounting is possible. Since flow is published as curves and not a single rating, send us your pressure and flow targets and we will confirm the correct size before you order.
Quick checklist
- ✓ Body size for your peak flow (PT3/8" here)
- ✓ Standard 0.9 MPa or low-pressure 0.4 MPa
- ✓ Gauge fitted, or order N without
- ✓ Gauge shape C round / F square
- ✓ Scale MPa (1), psi (2) or bar (3)
- ✓ Reflux valve needed, order K
Installation & Maintenance Notes
- check Install downstream of the filter, following the airflow arrow.
- check Keep inlet pressure at or below 1.0 MPa (145 psi).
- check Set pressure while air is flowing, then lock the knob.
- check Adjust within 0.05 - 0.9 MPa (7 - 130 psi) only.
- check Operating range -20 to +70 °C.
- check Panel-mount or use the fixing bracket; do not hang it on tubing.
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 GR400-10 Pressure Regulator (GR40010C3K) FAQ
AirTAC publishes regulator performance as flow-characteristic curves rather than a single rated figure, so no flow number is quoted here. Share your upstream pressure, set pressure and required flow, and we will confirm from the datasheet that size 400 at 3/8 in suits your application before you order.
K means a reverse/check valve is fitted in this GR400-10C3K. If your circuit does not need reverse-flow handling, the same regulator is available without the valve; bracket and thread options (PT standard, G/NPT to order) stay the same across the GR400 range.
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Request a Quote for AirTAC GR400-10 Pressure Regulator (GR40010C3K)
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.