The AirTAC GR30015LJC2GK AirTAC Pressure Regulator G1/2, 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 GR30015LJC2GK is an AirTAC GR-series air pressure regulator: it does one job, holding downstream pressure steady, and it carries no filter, no bowl and no lubricator. This size 300 unit is built with a G1/2 (BSPP) port and is the low-pressure type, so its setpoint range tops out at 0.4 MPa - the right choice when the downstream circuit must never see full line pressure. A round pressure gauge scaled in psi is fitted so the setpoint can be read directly, and the built-in reverse (check) valve lets downstream air back-flow past the regulator when the supply is shut down. No mounting bracket is included with this code; the GR body is also panel-mountable.
This is a genuine AirTAC part. The GR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, in standard and low-pressure types, with gauge and thread options to order. 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-series. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application.
| Model | GR30015LJC2GK AirTAC Pressure Regulator G1/2, Low-Pressure |
|---|---|
| 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 — round, 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). |
| C | Gauge shape: Round. 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 |
Feeding air cylinders or actuators on a carton-sealing or bagging machine that must run well below main line pressure. The low-pressure type caps the setpoint at 0.4 MPa, and the psi-scaled gauge lets maintenance set and verify the branch pressure at a glance.
Regulating atomising air to spray guns on a finishing line, where stable, moderate pressure matters more than high pressure. The check valve holds the set circuit steady when the main supply is isolated, and the 1/2 in G-thread port matches common booth plumbing.
Mounting the GR body directly on a control panel air manifold in a machine build, with no bracket needed. The round psi gauge faces the operator, and the reverse valve protects the regulated circuit from back-flow when neighbouring branches are vented or shut down.
Start with the port step: size 300 with a 1/2 in port suits mid-range circuits, and the 200/400/600 steps up or down from there. Choose the standard type for setpoints up to 0.9 MPa, or this low-pressure (L) type when the circuit must be limited to 0.4 MPa. Pick the gauge scale you want - MPa, psi or bar - and whether the embedded square gauge or an external round gauge suits the panel. Thread is PT as standard; G (BSPP) and NPT are catalogue options to order. A J code deletes the bracket, and a K code adds the reverse (check) valve fitted here.
One honest note on sizing: AirTAC publishes regulator flow as curves, not a single rated number, so we cannot quote a rated flow for this unit. Send us your application details and we will confirm the datasheet figures and the right size 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.
AirTAC publishes regulator flow as performance curves rather than a single rated figure, so we do not state a rated flow, Cv or SCFM number for this unit. Tell us your application - supply pressure, set pressure and the equipment being fed - and we will confirm the datasheet flow curves and check the sizing for you before you order.
The L in the code marks the low-pressure type: its setpoint range tops out at 0.4 MPa instead of the standard type's 0.9 MPa. Choose it when the downstream circuit must be limited to moderate pressure, such as spray air, low-pressure clamping or sensitive actuators. Maximum inlet pressure is still 1.0 MPa (145 psi); only the regulated output range is lower.
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.