The AirTAC GR30010LJC3T AirTAC Regulator, NPT 3/8 in, 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 PT3/8" 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 GR30010LJC3T is an AirTAC GR300 series air pressure regulator: its single job is to hold a steady downstream air pressure from a compressed-air supply. This unit is the low-pressure type, so its setting range tops out at 0.4 MPa, and it is built for circuits that must never be pushed to full line pressure. It carries 3/8 in NPT ports, a round pressure gauge reading in bar, and no mounting bracket; as a GR it contains no filter and no bowl, so nothing here drains or lubricates - it only regulates.
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, and options for standard or low-pressure regulation, embedded square or external round gauges with MPa, psi or bar scales, a reverse/check valve, and G (BSPP), NPT or PT threads. We confirm flow and datasheet figures for your specific model on request - just ask before ordering.
| Model | GR30010LJC3T AirTAC Regulator, NPT 3/8 in, Low-Pressure |
|---|---|
| Series | GR300 pressure regulator |
| Port size | PT3/8" (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 — round, 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. |
|---|---|
| 10 | Port size PT3/8". 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. |
| 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 · PT3/8" · 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 carton-sealing or bagging line, actuator circuits that clamp or hold delicate product need air held well below full line pressure. This low-pressure GR300 regulator, set within its up-to-0.4 MPa range, keeps that circuit steady through shift-long running.
Loom and winding machines use low-pressure air on dancer rollers and yarn-tension cylinders, where an over-pressure event ruins the web. A low-pressure regulator on the 3/8 in supply line, with a bar gauge for operator checks, holds that setting.
Bench rigs and pilot-scale test stands often need a gentle, repeatable air supply to instruments and small actuators. This regulator steps bench air down to the low-pressure range the rig requires, and the round bar gauge lets the operator verify the set point at a glance.
Pick the size step (200/300/400/600) by the port and flow your line needs - this 300 size takes 3/8 in ports, and larger sizes carry more flow. Choose the low-pressure type (L) when the working pressure must stay at or below 0.4 MPa; choose the standard type when you need the full 0.05-0.9 MPa range. Decide the gauge: this unit has an external round gauge on a bar scale, while other variants use an embedded square gauge with MPa, psi or bar scales. Thread is your call: PT is the catalogue standard, with G (BSPP) and NPT as orderable options - this one is NPT. A bracket can be included or omitted (this one omits it), and GR also panel-mounts.
One honest note on sizing: AirTAC publishes regulator flow as curves, not as a single rated number, so we cannot quote you a rated flow figure. Send us your application details and we will confirm the sizing against the datasheet curves 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 rated flow, Cv or l/min figure. Tell us your application and we will confirm the flow from the datasheet curves for this exact model on request before you order.
The L in the code marks the low-pressure type, whose setting range goes up to 0.4 MPa - right for circuits that must never see full line pressure. If your application needs the standard 0.05-0.9 MPa range, order the same size without the L suffix; we can confirm the right variant on request.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models are processed and dispatched in 3-5 business 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.