The AirTAC GR30010LJF2G AirTAC Regulator G3/8 Low-Pressure psi Gauge 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 GR30010LJF2G is an AirTAC GR-series air pressure regulator: it does one job, holding downstream pressure steady, and carries no filter, bowl or lubricator. This unit is the 300 size with a G3/8 (3/8 in) BSPP port, built as the low-pressure type with an adjustment range up to 0.4 MPa, and it ships with the embedded square gauge scaled in psi. The J code means no mounting bracket is fitted; the GR body is also panel-mountable. Maximum inlet pressure is 1.0 MPa (145 psi) and the working 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 ports from 1/8 in to 1 in, a choice of square (embedded) or round (external) gauges in MPa, psi or bar scales, an optional reverse/check valve, 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 | GR30010LJF2G AirTAC Regulator G3/8 Low-Pressure psi Gauge |
|---|---|
| Series | GR300 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.
| GR300 | G-series pressure regulator, 300 body — sets the port range. |
|---|---|
| 10 | Port size PT3/8". This body offers 08 = PT1/4", 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 | GR300 · PT3/8" · 0.05 - 0.4 MPa (7 - 58 psi) |
|---|---|
| One size down | GR200 |
| One size up | GR400 |
| Line order | Filter first, then regulator, then lubricator |
Blow-off and drying manifolds run at low pressures well inside this unit's 0.4 MPa range. The GR30010LJF2G holds a steady knife pressure so the drying pattern stays consistent across shift changes and compressor swings.
Lab rigs often need gentle, repeatable low-pressure supply to cylinders or test fixtures. The low-pressure adjustment range, psi-scaled square gauge and -20 to 70 C tolerance make this regulator a clean fit for controlled bench work.
Loom and winding-machine pneumatics frequently run at reduced pressures to protect fabric and tooling. This regulator stabilises the 3/8 in supply line to those actuators without adding filtration or lubrication the machine does not use.
Start with size and port: 200, 300, 400 and 600 step up in port size and flow capacity, so match the 3/8 in port here to your line size and let us check the flow curve against your air demand. This code is the low-pressure (L) type, adjusted up to 0.4 MPa; if your process needs the full standard range of 0.05-0.9 MPa, order a GR without the L code. Gauge choices are the embedded square gauge (standard, psi on this unit) or an external round gauge, each available in MPa, psi or bar scales. Thread is G (BSPP) on this unit; PT is the catalogue standard and G or NPT are order options. Brackets are optional (J = none fitted), and a K code adds a reverse/check valve where backflow protection is needed.
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 regulator flow as curves, not as a single rated number, so we do not quote a figure here. Tell us your inlet pressure and the air demand of your application and we will confirm the flow curve and sizing from the datasheet 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 suits circuits designed to run at reduced pressures. If you need the full standard GR range of 0.05-0.9 MPa, order the same size without the L code and we can confirm the exact configuration.
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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.