The AirTAC GR30010LJF2K AirTAC Low-Pressure Air Regulator PT3/8 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 GR30010LJF2K is an AirTAC GR300 low-pressure air pressure regulator with 3/8 in PT ports. It is a regulation-only unit: it steps compressed air down to a stable set pressure up to 0.4 MPa and holds it against demand, with no filter, no bowl and no lubrication function. This configuration ships with an embedded square pressure gauge scaled in psi, a reverse/check valve fitted on the outlet side, and no mounting bracket, so it is suited to panel or direct-line mounting where a bracket is not required.
This is a genuine AirTAC part. The GR line spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, standard and low-pressure (L) types, gauge scale choices, an optional reverse/check valve (K) and G or NPT thread variants orderable against the PT standard. Flow is published as curves rather than a single rated figure, so we confirm the datasheet and sizing figures on request before you order.
| Model | GR30010LJF2K AirTAC Low-Pressure Air Regulator PT3/8 |
|---|---|
| Series | GR300 pressure regulator |
| Port size | PT3/8" (PT 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. |
| (blank) | PT 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 |
On a carton-sealing or heat-shrink line, sealing bars and low-pressure actuators need a steady, reduced supply rather than full header pressure. This GR300 low-pressure regulator holds the set pressure up to 0.4 MPa at the 3/8 in take-off, and the fitted check valve keeps downstream pressure from pushing back into the header.
Pneumatically piloted diaphragm and angle-seat valves on food, beverage or chemical lines need a clean, stable pilot pressure below the main line rating. This regulator, with its psi-scaled square gauge and PT3/8 ports, sets and displays the pilot pressure, while the reverse/check valve protects the pilot circuit during upstream shutdowns.
Workholding clamps and swing cylinders on a machining fixture often call for a deliberately reduced clamping pressure to avoid distorting the part. Mounted panel-style without a bracket, this low-pressure GR300 regulator lets the setter dial in and read the clamping pressure in psi, with the check valve holding the setting against intermittent demand.
Start with the port step: this unit is size 300 with PT3/8 ports, so match it to your line size and the flow curve for the GR300 rather than to a single rated number. The L code makes this the low-pressure type, with a regulation range up to 0.4 MPa - choose it only if your process setpoint sits in that band; the standard GR type covers 0.05-0.9 MPa. The gauge here is the embedded square type scaled in psi; MPa and bar scales and an external round gauge are the other catalogue choices. The K code fits a reverse/check valve, useful where downstream pressure must not back-feed. Thread is PT as the standard; G (BSPP) and NPT are order options, not delivery promises. Brackets are optional on GR (J here means none fitted), and the GR is also panel-mountable.
Because flow is published as curves and not a single rating, ask us to confirm sizing against your application before ordering.
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, not as a single rated figure, so we do not quote a l/min, m3/h or SCFM number. Tell us your line size and working conditions and we will confirm the sizing from the datasheet on request before you order.
The L in GR30010LJF2K selects the low-pressure type, whose regulation range goes up to 0.4 MPa; the standard GR type covers 0.05-0.9 MPa if you need more. The K means a reverse/check valve is fitted, and F2 means the embedded square gauge is scaled in psi. The unit takes 3/8 in PT ports, with G and NPT threads available as order options.
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.