The AirTAC GR40010NTK 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, ordered without a 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 GR40010NTK is an AirTAC GR-series air pressure regulator: it does one job, holding a stable downstream pressure from your compressed-air supply, and it contains no filter element and no bowl. This 400-size unit is decoded with a 3/8 in NPT port, the standard regulator type with a 0.05-0.9 MPa (7-130 psi) adjustment range, and a maximum inlet pressure of 1.0 MPa (145 psi). The K in the code means a reverse (check) valve is fitted, so downstream pressure is held if the upstream supply is lost. No gauge is fitted in this configuration (N code), and a mounting bracket is included; the GR series is also panel-mountable. Its operating temperature range is -20 to 70 C, wider than the rest of the G family.
This is a genuine AirTAC part. The GR series is offered in sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 in, in PT (standard), G and NPT threads, with or without a gauge, with an optional low-pressure type (up to 0.4 MPa), and with an optional reverse valve. Flow 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 | GR40010NTK 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 | Not fitted |
| 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. |
| N | No pressure gauge (N). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 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 |
Set and hold the working pressure feeding a pneumatic press or clamping cylinder on a fabrication line, with the check valve holding the setpoint if the upstream supply drops.
Regulate the supply pressure to cylinders and actuators on a cartoning or wrapping machine, keeping seal and forming motions consistent at a fixed downstream pressure.
Drop plant air to a lower, stable pressure on individual branches of a distribution manifold feeding valves and air tools, independent of what the other branches draw.
Size the GR by the port step against the air demand of the circuit: 200 (1/8-1/4 in), 300 (3/8-1/2 in), 400 (1/2-3/4 in) and 600 (1 in) - this unit is a 400 with a 3/8 in NPT port. Choose the thread to match your plumbing: PT is the standard, while G (BSPP) and NPT are catalogue options ordered by suffix (this unit is NPT). Decide whether you want a gauge fitted and, if so, which style and scale (square embedded or external round; MPa, psi or bar) - the N in this code means no gauge is supplied, so add one separately if you need a local pressure readout. The K code here means a reverse (check) valve is fitted; order without it if you do not need downstream pressure retention. If your set pressure never exceeds 0.4 MPa, the L low-pressure type is available. A mounting bracket is included with this unit. Because flow is published as curves rather than a single rating, ask us to confirm sizing against your application before ordering.
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 performance curves rather than a single rated figure, so we do not quote a rated flow, Cv or SCFM number. Send us your application details and we will confirm the datasheet flow figures for the 400 size at your operating conditions on request.
N means no pressure gauge is fitted, so add a gauge (square embedded or external round, in MPa, psi or bar scale) if you want a local readout. K means a reverse (check) valve is fitted, which holds downstream pressure if the upstream supply is interrupted. The unit otherwise carries the standard 0.05-0.9 MPa adjustment range, a 3/8 in NPT port, an included mounting bracket, and a -20 to 70 C operating range.
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.