The AirTAC GR40010LC2GK AirTAC Low-Pressure Regulator, G3/8 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 GR40010LC2GK is an AirTAC GR-series air pressure regulator: it does one job, holding downstream pressure steady from a compressed-air supply. This is the low-pressure type, adjustable up to 0.4 MPa, in the size 400 body with a G3/8 (BSPP) port. It is fitted with an external round gauge reading in psi, a reverse/check valve that holds the set pressure if upstream supply is interrupted, and a mounting bracket (the GR can also be panel-mounted). It is rated for a maximum inlet pressure of 1.0 MPa (145 psi) and operates from -20 to 70 C - a wider temperature window than the rest of the G family. As a pure regulator it contains no filter, no bowl and no drain, and it adds no lubrication.
This is a genuine AirTAC part from the GR range, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, standard or low-pressure adjustment, gauge or no-gauge builds, and PT, G or NPT threads. Flow for GR regulators is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GR40010LC2GK AirTAC Low-Pressure Regulator, G3/8 |
|---|---|
| Series | GR400 pressure regulator |
| Port size | PT3/8" (G (BSPP) 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. |
| G | G (BSPP) 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 |
Set a stable, reduced supply pressure to spray guns and atomising air on a finishing booth, where the process runs well below standard line pressure and a steady setting matters for finish quality.
Feed film-sealing or tucking cylinders on a packaging line at a controlled low pressure, so delicate jaws and light-duty actuators are not slammed at full shop-air pressure.
Hold a repeatable low supply pressure to bench-top process rigs, agitators or pneumatic test fixtures in a laboratory or pilot plant, with the psi gauge giving a direct local reading.
Start with the port step: this unit is size 400 with a G3/8 port, one step up from 1/4 in and one below 1/2 in - match it to your line size and required flow, since larger sizes carry more flow. Then confirm the adjustment band: this is the low-pressure (L) type, adjustable up to 0.4 MPa; if your process needs up to 0.9 MPa, choose a standard GR instead. The fitted round gauge reads in psi; square embedded gauges and MPa or bar scales are the alternative builds. Thread here is G (BSPP); PT is the standard thread and NPT is available to order. The K code adds a reverse/check valve - useful where a dropped supply must not dump the set pressure - and the bracket is included, with panel mounting also possible on GR. Because flow is published as curves rather than a single rating, send us your application 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 regulator flow as performance curves rather than a single rated figure, so we do not quote one number. Tell us your inlet pressure, set pressure and expected consumption, and we will confirm the flow from the datasheet curves for this exact model before you order.
The L in the code marks the low-pressure regulator type: its adjustment range tops out at 0.4 MPa instead of the standard GR range. It suits processes that run at reduced pressure. If your application needs a higher set point, choose a standard GR400 build instead - and note this unit is still rated for up to 1.0 MPa inlet.
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.