The AirTAC GR40010JNTK 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, 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 GR40010JNTK is an AirTAC GR-series air pressure regulator in the 400 size, supplied with a 3/8 in NPT thread port. It is a regulation-only unit: it steps the compressed-air supply down to a stable working pressure you set anywhere in its 0.05-0.9 MPa (7-130 psi) adjustment range, with a maximum inlet pressure of 1.0 MPa (145 psi). This configuration carries the K option, so a reverse (check) valve is fitted, allowing downstream air to hold rather than vent back through the unit when supply pressure is lost. No pressure gauge is fitted (N option) and no mounting bracket is included (J option), though the GR body is also panel-mountable. Operating temperature is -20 to 70 C, wider than the rest of the G-series families.
This is a genuine AirTAC part. The GR family spans the 200, 300, 400 and 600 sizes with port sizes from 1/8 in to 1 in, in standard and low-pressure (L) types, with optional gauges, brackets, threads and reverse valves. Flow figures for this regulator are published as curves rather than a single rating, so ask us and we will confirm the datasheet figures against your application on request.
| Model | GR40010JNTK 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 | 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. |
| J | Supplied without bracket. |
| 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 a stable, repeatable working pressure for a bench or floor pneumatic press so clamping and forming strokes act consistently, with the check valve holding the circuit if shop air drops.
Feed a packaging machine's cylinder and actuator zone from a dedicated regulator drop, letting each zone run at its own set pressure instead of full header pressure.
Regulate the air to conveyor stopper and diverter cylinders on a sorting line so divert strokes run at the pressure the mechanism was set up for, not line pressure.
Choose the GR size by the port and flow step your line needs: 200, 300, 400 or 600, with ports from 1/8 in up to 1 in - this 400-size unit takes a 3/8 in NPT port. Set your 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 (up to 0.4 MPa) is the alternative. Decide whether you want a gauge fitted (square embedded or external round, in MPa, psi or bar scales) - this code has none, so you would read pressure at the machine's own gauge. The fitted reverse (check) valve keeps downstream pressure from backing out through the regulator, useful on circuits that must hold position or pressure during a supply drop. Thread is NPT here; PT is the catalogue standard and G (BSPP) is also an orderable option. Bracket is not included with the J option. Because flow is published as curves and not a single rating, send us your flow and pressure requirements 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 number, so we do not quote a flow figure for this regulator. Tell us your required flow and working pressure and we will confirm the datasheet curve figures against your application on request.
The N in the code means no pressure gauge is fitted, and the J means no mounting bracket is included. You can read the downstream pressure on the machine's own gauge, or order a GR400 variant with the embedded square gauge or the external round gauge in MPa, psi or bar scales. The 0.05-0.9 MPa (7-130 psi) adjustment range is unchanged either way.
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.