The AirTAC GR30015LJC2 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 GR30015LJC2 is an AirTAC GR-series air pressure regulator: it does one job, holding your downstream pressure steady as upstream supply and air demand fluctuate. This is the low-pressure type, set up for circuits that must never see more than 0.4 MPa, with 1/2 in PT ports, a round pressure gauge reading in psi, and no mounting bracket - the GR body can also be panel-mounted directly. Maximum inlet pressure is 1.0 MPa (145 psi) and the operating 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 port sizes from 1/8 to 1 in, and each size is available as standard or low-pressure type, with or without a gauge, with MPa, psi or bar scales, with an optional reverse/check valve, and in PT, G or NPT threads. Flow is published as curves rather than a single rated figure, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GR30015LJC2 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 — round, 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). |
| C | Gauge shape: Round. 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 |
Fixture clamps that must grip gently and never over-pressurise the workpiece are held at a fixed low setting. This low-pressure regulator caps the clamp circuit at up to 0.4 MPa and the round psi gauge lets the setter read and verify the clamp pressure directly.
Positioner and pilot stages on pneumatic control valves need a clean, steady, low-pressure air supply to stroke predictably. This GR300 regulator in 1/2 in PT ports holds that pilot pressure constant even as the plant air header pressure wanders.
Pushers, hold-downs and label presses on a packaging line often run at deliberately low pressure to avoid crushing cartons. This low-pressure type regulator gives the line a stable, capped supply, with the psi gauge giving operators a visible setpoint at the machine.
Start with the port step: this unit is size 300 with 1/2 in PT ports, one step up from the 1/4 in size-200 units - pick the size that matches your line and the flow your actuators need. The decisive choice here is regulator type: this is the low-pressure (L) version, adjustable up to 0.4 MPa, so choose it when your circuit is capped well below the standard type's range; if you need the full 0.05-0.9 MPa span, order the standard GR300 instead. The gauge on this code is the external round type reading in psi; embedded square gauges and MPa or bar scales are the other catalogue options. Thread is PT as the standard - G (BSPP) and NPT are order options, so specify the one your pipework uses. No bracket is fitted on this code (J), though the GR is also panel-mountable. Because flow is published as curves rather than a single rating, send us your application details and we will confirm sizing against the datasheet before you order.
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, not as a single rated number, so we do not quote a flow figure for this unit. Tell us your line pressure, set pressure and the air demand of your equipment, and we will confirm the flow from the GR300 datasheet on request before you order.
The L in the code means this is the low-pressure regulator type, adjustable up to 0.4 MPa - suited to circuits that must stay well below normal plant air pressure. If your application needs the full 0.05-0.9 MPa adjustment span, order the standard GR300 in the same size and options instead; both share the same 1/2 in PT port size.
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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.