The AirTAC GR30015LJF2 AirTAC Low-Pressure Regulator PT1/2 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 GR30015LJF2 is an AirTAC GR-series air pressure regulator in size 300 with a PT1/2 (1/2 in) port. This is the low-pressure type, so the outlet pressure is adjustable up to 0.4 MPa - suited to circuits that must never see full-line pressure. It is regulation only: there is no filter, no bowl and no lubricator in this unit. The embedded square pressure gauge reads in psi, and the code specifies no mounting bracket, though the GR body is also panel-mountable.
This is a genuine AirTAC part. The GR family spans sizes 200, 300, 400 and 600 with a choice of PT, G (BSPP) or NPT threads, standard or low-pressure regulation, gauge scale options and bracket or no-bracket configurations. Flow is published as curves rather than a single rating, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GR30015LJF2 AirTAC Low-Pressure Regulator PT1/2 |
|---|---|
| Series | GR300 pressure regulator |
| Port size | PT1/2" (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 | 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. |
|---|---|
| 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. |
| (blank) | PT 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 · 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 |
Set a safe, stable reduced pressure ahead of spray guns and air-assist lines, where the low-pressure adjustment range matches the gentle settings atomising air demands.
Regulate supply pressure to clamp cylinders on a CNC fixture so workholding force stays consistent without exposing the circuit to full line pressure.
Trim the pressure feeding sealing bars and small actuators on a packaging line, with the psi gauge giving operators a direct readout at the machine.
Start with the size and port: GR300 with a PT1/2 port is the mid-range step in the 200/300/400/600 ladder, and the right size depends on the air demand of the circuit - we can check the published flow curves against your requirement before you order. Decide the regulation type next: this low-pressure (L) version adjusts up to 0.4 MPa, while the standard GR range covers 0.05-0.9 MPa; pick the one that matches your downstream device. The square gauge here reads in psi, and MPa or bar scales are also available. Thread is PT as standard, with G (BSPP) and NPT as orderable options, and a bracket can be added if this no-bracket code does not suit your mounting. Because flow is published as curves rather than a single rating, ask us to confirm sizing against the 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 regulator flow as curves rather than a single rated figure, so there is no one number we can quote. Tell us your application and we will confirm the relevant flow-curve and datasheet figures for the GR300 size on request before you order.
The L in the code marks the low-pressure type, whose adjustment range goes up to 0.4 MPa. If your circuit needs the full standard range of 0.05-0.9 MPa, choose a GR300 code without the L instead. Max inlet pressure is 1.0 MPa (145 psi) either way, and the unit handles -20 to 70 C.
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.