The AirTAC GR40010LC2TK 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 - 0.4 MPa (7 - 58 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 GR40010LC2TK is an AirTAC GR-series air pressure regulator: it does one job, holding downstream pressure steady from your compressed-air supply. This unit is the 400 size with a 3/8 in NPT port, built as the low-pressure type so downstream pressure is adjustable up to 0.4 MPa. It comes with a round external gauge scaled in psi, a reverse (check) valve fitted so downstream pressure is held if the supply drops, and a mounting bracket included; the GR body is also panel-mountable. Maximum working (inlet) pressure is 1.0 MPa (145 psi), and the operating temperature range is -20 to 70 C, wider than the rest of the G family.
This is a genuine AirTAC part. The GR line spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, standard or low-pressure regulation, gauge scale options in MPa, psi or bar, and G (BSPP) or NPT threads as order options. 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 | GR40010LC2TK AirTAC Air Pressure Regulator, NPT3/8 |
|---|---|
| Series | GR400 pressure regulator |
| Port size | PT3/8" (NPT thread) |
| Regulating range | 0.05 - 0.4 MPa (7 - 58 psi) |
| Pressure type | Low-pressure 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, 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". |
| L | Low-pressure type — 0.05 - 0.4 MPa (7 - 58 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. |
| 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 - 0.4 MPa (7 - 58 psi) |
|---|---|
| One size down | GR300 |
| One size up | GR600 |
| Line order | Filter first, then regulator, then lubricator |
On a fixture line where clamp cylinders are rated for gentle, consistent holding force, this regulator holds a low downstream setting (up to 0.4 MPa) steady at the station, with the check valve keeping the clamps from relaxing if the main supply dips mid-cycle.
A test bench or lab rig that needs a stable, low-pressure air feed to instruments and small actuators gets fine, repeatable control from the low-pressure adjustment range, read directly on the fitted psi gauge, across a wide -20 to 70 C ambient.
Packaging and labeling heads that use low-pressure air for hold-down rollers or air-assist cylinders run best off a dedicated regulator; the 3/8 in NPT port drops straight into the machine's air drop, and the bracket lets you mount the unit at the point of use.
Start with the port and size: this is the 400 frame at 3/8 in NPT, one step up from the 300 series, so choose it where your line plumbing is 3/8 in and your flow demand is higher than a 300 can comfortably carry - we will confirm the flow curve against your application before you order. The low-pressure (L) type caps adjustment at 0.4 MPa, so pick it where the process runs at low downstream pressure; if you need the full 0.05-0.9 MPa range, the standard GR400 is the right variant. This unit ships as a configuration with a round psi gauge and a reverse/check valve already coded in; if you would rather have the embedded square gauge, a different scale (MPa or bar), no check valve, or a G (BSPP) thread instead of NPT, those are catalogue options on the same series - note that PT is the standard thread and G/NPT are ordered as options. A mounting bracket is included, and the GR can also be panel-mounted.
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, not as a single rated number, so there is no one l/min or SCFM figure we can honestly quote. Send us your line pressure and expected air demand and we will confirm the sizing against the datasheet curve on request before you order.
The L in GR40010LC2TK marks the low-pressure type: downstream pressure is adjustable up to 0.4 MPa instead of the standard 0.05-0.9 MPa range, which suits processes that run at low regulated pressure. The K means a reverse (check) valve is fitted, so downstream pressure is retained if the upstream supply is lost. The C2 codes the round gauge in a psi scale, and T is the NPT thread option.
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.