The AirTAC GR30015LJF2GK AirTAC Low-Pressure Regulator G1/2 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 PT1/2" 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 GR30015LJF2GK is an AirTAC GR-series air pressure regulator: it does one job, holding downstream pressure steady on a compressed-air line. This is the 300 size with a G1/2 (1/2 in) BSPP parallel port, built as the low-pressure type with an adjustment range up to 0.4 MPa, so it suits circuits that need fine control at modest pressures rather than full line pressure. The embedded square gauge is fitted and reads in psi, and a reverse/check valve (code K) is fitted so downstream pressure is held if the upstream supply drops. No mounting bracket is included with this code (J); the GR body is also panel-mountable.
This is a genuine AirTAC part. The GR family spans the 200, 300, 400 and 600 sizes with port options from 1/8 in to 1 in, standard or low-pressure regulation, gauge or no gauge, MPa/psi/bar scales, G or NPT thread variants, and an optional reverse/check valve. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet numbers for your application before ordering.
| Model | GR30015LJF2GK AirTAC Low-Pressure Regulator G1/2 |
|---|---|
| Series | GR300 pressure regulator |
| Port size | PT1/2" (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. |
|---|---|
| 15 | Port size PT1/2". 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 · PT1/2" · 0.05 - 0.4 MPa (7 - 58 psi) |
|---|---|
| One size down | GR200 |
| One size up | GR400 |
| Line order | Filter first, then regulator, then lubricator |
Settling a steady, modest supply pressure to spray guns and air-assisted applicators in a finishing booth, where the low-pressure adjustment range keeps atomising air consistent across a shift.
Regulating the supply header feeding directional valves and cylinders on a carton or bottle packaging machine, with the check valve holding the downstream side if the plant air dips.
Trimming bench and fume-hood air drops in a laboratory or pilot plant to gentle, repeatable pressures for air curtains, agitation and small pneumatic fixtures, read directly on the psi gauge.
Start with the port step: GR comes in sizes 200, 300, 400 and 600, stepping up in port and flow capacity, so match the size to the air demand of the circuit rather than the pipe alone. Then decide the regulator type: this code is the low-pressure type (L), adjusting up to 0.4 MPa - choose the standard type instead if you need the full 0.05-0.9 MPa range. Pick the gauge scale (MPa, psi or bar) and whether a gauge is fitted at all, and specify the thread: PT is the standard, with G (BSPP) and NPT available as order options. Decide on the reverse/check valve (K) if the downstream side must hold pressure on supply loss, and on the bracket (this code omits it; GR also panel-mounts). One honest note on sizing: flow for this family is published as curves, not a single rated number, so send us your application details and we will confirm the datasheet figures 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.
We do not quote a single rated flow figure, because AirTAC publishes GR performance as flow curves rather than one number, and quoting a figure outside the datasheet would be guesswork. Tell us your line pressure, set pressure and the air demand of the equipment, and we will confirm the relevant datasheet flow figures for this 300-size, G1/2 regulator on request before you order.
The L in the code GR30015LJF2GK marks the low-pressure type, whose adjustment range tops out at 0.4 MPa - the right choice for circuits running well below full line pressure. If your application needs adjustment up to 0.9 MPa, the same GR300 body is available in the standard type without the L code; the rest of the decode (G1/2 port, G thread, square psi gauge, check valve, no bracket) stays as specified.
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.