The AirTAC GR30015LJF2G AirTAC Low-Pressure Air 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 GR30015LJF2G is an AirTAC GR-series air pressure regulator: it does one job, holding a steady downstream pressure from a compressed-air supply. This configuration is the 300 size with G1/2 ports, built as the low-pressure type with an adjustment range up to 0.4 MPa, and it carries an embedded square gauge reading in psi. Maximum inlet pressure is 1.0 MPa (145 psi), the working temperature span is -20 to 70 C, and the J suffix means no mounting bracket is fitted; the GR body is also panel-mountable. As a regulator it has no filter bowl, no drain and no lubricator.
This is a genuine AirTAC part. The GR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, and can be ordered with a standard or low-pressure setting range, with or without a gauge (square embedded or external round, in MPa, psi or bar scales), with or without a bracket, and with a reverse/check valve where needed. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GR30015LJF2G AirTAC Low-Pressure Air 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 | 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. |
| G | G (BSPP) 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 |
On a packaging or converting line where adhesive or coating heads need a gentle, stable air setting well below 1 bar, this low-pressure regulator holds the downstream pressure steady so the dispense stays consistent through the shift.
Loom and spinning machines use low-pressure air jets for threading and cleaning. A GR300 regulator at the machine drop lets the operator set and hold the jet pressure with a psi gauge readout at the point of use.
Actuated process valves and positioners on a plant floor need a clean, stable pilot pressure under 0.4 MPa. This 1/2-inch low-pressure regulator at the pilot takeoff keeps the actuator signal pressure constant as the main header pressure wanders.
Start with the size and port step: 200, 300, 400 and 600 correspond to progressively larger ports (1/8 through 1 inch) and progressively higher flow capacity, so match the port to your line size and the size to the air demand of the circuit. Then choose the regulator type: this unit is the low-pressure (L) type, correct where the downstream setting must stay at or below 0.4 MPa; the standard type covers the higher range. Decide on the gauge: this configuration has the embedded square gauge in psi, and MPa or bar scales and an external round gauge are order options. Thread is your choice of PT (the standard), G (BSPP) or NPT at order time, and a mounting bracket can be added if you do not want the J no-bracket configuration.
One honest note on sizing: AirTAC publishes GR flow capacity as curves, not as a single rated number, so we cannot quote you a rated flow figure here. Send us your application's air demand and pressure window and we will confirm the correct size 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 GR-series flow capacity as performance curves rather than a single rated figure, so we do not state a rated flow, Cv or SCFM number. Tell us your line size, inlet pressure and required downstream flow, and we will confirm the sizing against the datasheet on request before you order.
The L in the code means this GR300 is the low-pressure regulator type, with an adjustment range up to 0.4 MPa, suited to circuits that must never be set high. If your application needs settings above that, the standard GR type with its wider adjustment range is the correct choice - the two are separate order codes, not a field adjustment.
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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.