The AirTAC GR30015LJF3T AirTAC Air Regulator NPT1/2 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 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 GR30015LJF3T is a genuine AirTAC GR-series air pressure regulator: it does one job, holding downstream pressure steady at the value you set, and it carries no filter, no bowl and no lubricator. This unit is the 300 size with 1/2 in NPT ports, built as the low-pressure type with a setting range up to 0.4 MPa, so it suits circuits that must never see full-line pressure. A square pressure gauge scaled in bar is fitted as standard so the set point can be read and adjusted directly at the unit.
This is a genuine AirTAC part. The GR family spans the 200, 300, 400 and 600 sizes with port sizes from 1/8 in to 1 in, PT as the standard thread and G or NPT as order options, with square or round gauges in MPa, psi or bar scales. Flow figures for this family are published as curves rather than a single rating, so ask us to confirm sizing against your application before ordering.
| Model | GR30015LJF3T AirTAC Air Regulator NPT1/2 Low-Pressure |
|---|---|
| Series | GR300 pressure regulator |
| Port size | PT1/2" (NPT 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, bar 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. |
| 3 | Gauge scale: bar. 1 is MPa, 2 is psi, 3 is bar. |
| T | NPT 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 |
Workholding clamps and swing cylinders on a machining centre run best at a gentle, steady pressure so parts are held firmly without distortion. This low-pressure regulator sits on the clamp circuit and holds the set point while the main line runs higher.
Baggers, carton sealers and labelling heads use small cylinders and air bells that jam or crush product at full line pressure. A dedicated regulator on that branch keeps the delicate motion repeatable, independent of the main header.
Bench-scale reactors, agitators and pneumatic dosing pumps in a lab or pilot plant need a calm, stable air supply that stays put while experiments run. This unit sets and holds that branch pressure, with the bar-scaled gauge giving a direct local readout.
Step up or down through the 200 / 300 / 400 / 600 sizes to match the port and flow path your line needs; this unit is 300 size with 1/2 in NPT ports. The L code makes it the low-pressure type, limited to a 0.4 MPa setting range - choose the standard GR if you need settings up to 0.9 MPa. The fitted square gauge is scaled in bar; MPa and psi scales and an external round gauge are alternatives. Thread is NPT here, with PT as the catalogue standard and G (BSPP) also orderable. Bracket is not included with the J code, though GR also panel-mounts. Flow is published as curves, not a single rating, so send us your application and we will confirm sizing 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 GR-series flow as curves rather than a single rated figure, so we do not quote one number. Tell us your application and required flow path and we will confirm sizing from the datasheet on request before you order.
The L in the code makes it the low-pressure type, with a setting range up to 0.4 MPa instead of the standard GR range - the right choice when the circuit must stay well below full line pressure. The F3 code fits the embedded square gauge scaled in bar; MPa or psi scales and an external round gauge are available as 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.