The AirTAC GR40010LJC2G AirTAC Air Pressure Regulator G3/8 Low-Pressure 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 GR40010LJC2G is an AirTAC GR400 series air pressure regulator for compressed air, built for low-pressure duty with an adjustment range up to 0.4 MPa. This configuration is the 400 size with a G3/8 (BSPP) port, fitted with an external round pressure gauge scaled in psi, and supplied without a mounting bracket - the GR body is also panel-mountable, so it can be screwed directly to a manifold or control panel. As a pure regulator it contains no filter, no bowl and no drain, so it should be fed by filtered air where particulate or water removal is needed.
This is a genuine AirTAC part. The GR family spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 inch, standard or low-pressure regulation, a choice of gauge type and scale, optional reverse/check valve, and PT, G or NPT threads. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -20 to 70 C. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet and sizing figures for your application on request.
| Model | GR40010LJC2G AirTAC Air Pressure Regulator G3/8 Low-Pressure |
|---|---|
| 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 | Supplied without bracket |
| 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 | Not fitted |
| 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. |
| J | Supplied without bracket. |
| (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. |
| (blank) | No reverse-flow valve (the default). |
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 |
A 3/8-line feeding pneumatic clamps or soft-touch workholding on a CNC fixture, where the setpoint must stay well below 0.4 MPa and the round psi gauge lets the operator read the clamp pressure directly at the cell.
Regulated low-pressure air for hold-down rollers, flap guides or product-stabilising jets on a packaging conveyor, where too much pressure damages lightweight cartons and the low-pressure type keeps the setting safely capped.
Panel-mounted regulation of pilot air to valves and actuators on a process skid, with the GR400 body screwed straight to the panel and the psi-scaled round gauge giving a clear local setpoint readout.
Choose the GR size by the port and flow step your line needs: 200 through 600 cover 1/8 to 1 inch, and the 400 size with its 3/8 port suits mid-range circuits. The L code here marks the low-pressure type, limited to 0.4 MPa - pick it only when your setpoint sits below that ceiling; the standard type covers 0.05-0.9 MPa. Gauge options are an embedded square gauge (MPa, psi or bar scale) or an external round gauge; this unit carries the round gauge in psi. Thread is PT as standard with G and NPT as order options, and the J code means no bracket is fitted, so plan for panel mounting or add a bracket variant.
One honest note on sizing: AirTAC publishes GR flow as curves, not a single rated figure, so we do not quote a flow number. Send us your application details and we will confirm the datasheet and correct size before you order.
Quick checklist
Without a reflux valve, air cannot flow back through the regulator — order the K option if reverse flow is required. A regulator does not remove water or particulate; that is the filter's job.
AirTAC publishes GR flow as performance curves rather than a single rated figure, so we do not state a l/min, m3/h or SCFM number. Tell us your inlet pressure, setpoint and expected consumption, and we will confirm the datasheet curve and check the sizing for your application on request before you order.
The L in the code marks the low-pressure type, whose adjustment range tops out at 0.4 MPa - it is chosen for circuits that never need a higher setpoint. If your process may need up to 0.9 MPa, order the standard GR type instead. Maximum inlet pressure is 1.0 MPa (145 psi) either way, and the GR works from -20 to 70 C.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models are processed and dispatched in 3-5 business 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.