The AirTAC GR40010C3TK AirTAC Air Pressure Regulator, NPT3/8 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 GR40010C3TK is an AirTAC GR-series air pressure regulator for compressed air only: it reduces and holds a stable downstream pressure, with no filtration and no lubrication in this unit. This 400-size configuration is fitted with a 3/8 in NPT port, a round pressure gauge scaled in bar, and a built-in reverse (check) valve that lets downstream pressure hold rather than bleed back through the regulator when the upstream supply is removed. The standard regulator covers a set-point range of 0.05-0.9 MPa (7-130 psi), with a maximum inlet (working) pressure of 1.0 MPa (145 psi), and the GR body is rated for -20 to 70 C, wider than the rest of the G family.
This is a genuine AirTAC part. The GR400 series is one of four sizes (200/300/400/600) with port options from 1/8 to 1 inch, gauge scales in MPa, psi or bar, an optional low-pressure type, and G (BSPP) or NPT threads as order options alongside the PT standard. Flow for this series is published as curves rather than a single rated figure, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GR40010C3TK AirTAC Air Pressure Regulator, NPT3/8 |
|---|---|
| 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, 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. |
|---|---|
| 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. |
| 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 stamping or assembly press, the GR40010C3TK holds a steady clamping pressure to the air cylinders, with the check valve keeping the clamp circuit pressurised if the main supply drops.
Feeding diverters, sealers and pusher cylinders on a packaging conveyor, the regulator keeps actuator speed and force consistent by holding one set downstream pressure from a variable plant supply.
On a CNC machining centre, the unit regulates the air to fixture clamps and the tool-change circuit, with the bar gauge giving the operator a direct read of the set pressure at the machine.
Start from the port and flow step: the 400 size with a 3/8 in port sits in the middle of the GR range (200/300/400/600), so step up or down a size if your line runs above or below that. Set the gauge scale to match your shop floor - this unit carries a round gauge in bar, and MPa or psi scales are orderable. Choose the thread to match your piping: PT is the catalogue standard, with G (BSPP) and NPT available as options - this unit is ordered in NPT. The K code means a reverse (check) valve is fitted; order without it if you want downstream pressure to vent back through the regulator. A mounting bracket is included, and the GR body is also panel-mountable. Because flow is published as curves rather than a single rating, send us your application details and we will confirm sizing against the datasheet 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, not as a single rated figure, so we do not quote a flow number. Send us your application details and we will confirm the relevant datasheet figures for the GR400 at 3/8 in on request before you order.
K means a reverse (check) valve is fitted, so downstream pressure is held instead of venting back through the regulator when the supply is removed. C3 means the round external gauge is fitted and scaled in bar; MPa and psi scales are available as order options.
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.