The AirTAC GR40010LJF2G AirTAC Air 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 GR40010LJF2G is an AirTAC GR400 series air pressure regulator, a regulation-only unit: it controls downstream pressure and contains no filter, no bowl and no lubricator. This configuration is the low-pressure type, so its adjustment range goes up to 0.4 MPa, making it the right choice when the circuit must run well below standard line pressure. It carries a 3/8 inch port with G (BSPP) thread, a maximum inlet pressure of 1.0 MPa (145 psi), and an operating temperature of -20 to 70 C, wider than the rest of the G family. The embedded square gauge with psi scale is fitted as standard, and the J suffix means no mounting bracket is supplied; the GR body is also panel-mountable.
This is a genuine AirTAC part. The GR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, and options include standard or low-pressure regulation, square or external round gauges with MPa, psi or bar scales, a reverse/check valve, and PT, G or NPT threads. Flow figures for this series are published as curves rather than a single rating, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GR40010LJF2G AirTAC Air 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 | Supplied without bracket |
| Fluid | Compressed air |
|---|---|
| Max. working pressure | 1.0 MPa (145 psi) |
| Temperature range | -20 to +70 °C |
| Pressure gauge | Fitted — square, 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). |
| F | Gauge shape: Square. 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 |
On a carton-sealing or case-packing line, the hold-down clamps often need a gentle, stable pressure well below the main supply. This low-pressure GR400 regulator lets the operator set the clamp circuit up to 0.4 MPa independently of the plant header pressure, with the psi gauge read at the machine.
Bottle rinsing and blow-off stations on a filling line run at reduced pressure to avoid knocking containers over. A GR400 low-pressure regulator in the 3/8 inch supply line keeps the air knife circuit at a repeatable low setpoint, separate from the higher-pressure actuation circuits.
Weaving and knitting machines use lightly loaded air cylinders for yarn guides and fabric tensioning, where full line pressure would over-stress the mechanism. This GR400 regulator drops the supply to the loom's low-pressure circuit and holds it steady across a -20 to 70 C shop floor range.
Start with the size and port: GR400 with a 3/8 inch port sits in the middle of the 200/300/400/600 range, so step up or down according to the air demand of the line. Choose the low-pressure type (L) only when the downstream setpoint stays at or below 0.4 MPa; the standard GR covers 0.05-0.9 MPa. Pick the gauge scale you want to read at the machine - this unit is supplied with the embedded square gauge in psi, and MPa or bar scales plus an external round gauge are available. Thread is a decodable choice: PT is the standard, while G (BSPP) and NPT are catalogue options to order. Bracket J means no bracket is fitted; add one if you need wall or panel mounting. Flow for this series is published as curves, not a single rated figure, so ask us to confirm sizing against your application before ordering.
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-series flow as curves, not as a single rated figure, so we do not quote a number. Tell us your inlet pressure, setpoint and expected air demand, and we will confirm the flow from the datasheet and check the sizing against your application on request.
The L in the code means the low-pressure version of the GR400: its adjustment range goes up to 0.4 MPa instead of the standard GR range of 0.05-0.9 MPa. It is the correct choice when the downstream circuit must never exceed 0.4 MPa. Maximum inlet pressure is still 1.0 MPa (145 psi), and the psi-scaled square gauge is fitted as standard.
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.