The AirTAC GR30010LJF2GK AirTAC 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 GR30010LJF2GK is an AirTAC GR-series air pressure regulator in size 300 with a G3/8 (3/8 in) port and G (BSPP) thread. This is the low-pressure type, so it regulates downstream pressure up to 0.4 MPa, while the unit itself accepts a maximum inlet pressure of 1.0 MPa (145 psi). The code also specifies an embedded square gauge with a psi scale, a reverse (check) valve fitted, and no mounting bracket - the GR body is also panel-mountable. As a pure regulator it performs one job: holding a set downstream pressure. It contains no filter, no drain bowl and no lubricator, so it should sit downstream of filtration where clean, dry air is needed. Operating temperature is -20 to 70 C, wider than the rest of the G-series, which suits colder installations.
This is a genuine AirTAC part. The GR family is offered in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, in standard or low-pressure types, with or without a bracket, with embedded square or external round gauges in MPa, psi or bar scales, and with an optional reverse valve. Flow for this size 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 | GR30010LJF2GK AirTAC Pressure Regulator G3/8 Low-Pressure |
|---|---|
| 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 | 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.
| 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. |
| 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 | 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 |
Pneumatic clamps and hold-downs on carton or tray packaging machinery often work best at gentle set points. This low-pressure GR300 regulator holds a stable downstream pressure up to 0.4 MPa at the 3/8 in take-off, and the psi gauge lets operators read and set the clamp pressure directly.
Air knives and blow-off nozzles that dry or clear bottles and cans run at low pressure to avoid disturbing the product. Fitted at the drop to the conveyor section, this regulator sets and holds that gentle pressure, while the reverse valve prevents backflow through the unit.
Weaving and knitting machines use low-pressure air for thread tensioning, doffing and small actuator movements. This GR300 regulator on the machine's 3/8 in supply keeps those circuits at a steady low set point, and its -20 to 70 C range suits mill environments that cool down overnight.
Start with the port step: this unit is size 300 with a 3/8 in port, and the GR range steps up through 200, 400 and 600 as your air demand grows - match the size to the flow your line needs rather than to the pipe alone. Next, choose the regulator type: this low-pressure (L) version regulates up to 0.4 MPa; the standard type covers higher set points, so confirm your working pressure falls inside the low-pressure range. Then settle the details the code carries: gauge scale (this one reads psi; MPa and bar scales are available), whether you want the reverse (check) valve fitted, the thread (PT is the standard; G and NPT are order options), and whether a mounting bracket is needed (this configuration ships without one).
One honest note on sizing: AirTAC publishes GR flow as curves, not as a single rated number, so we do not quote a rated flow figure. Send us your application details and we will confirm the flow and datasheet figures against your requirement 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-series flow as curves rather than a single rated figure, so we do not quote a rated flow number for this unit. Tell us your application - supply pressure, set point and the air demand of the equipment - and we will confirm the flow and datasheet figures for the GR300 size against your requirement before you order.
The trailing K means a reverse (check) valve is fitted to this regulator; units without the K do not have it. The F2 in the code specifies the embedded square gauge with a psi scale - MPa and bar scales are also available if you prefer a different readout. The L earlier in the code marks this as the low-pressure type, regulating up to 0.4 MPa.
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.