The AirTAC GR30010LJC1T AirTAC Regulator 3/8 in NPT, 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 GR30010LJC1T is an AirTAC GR-series air pressure regulator: it does one job, holding a stable downstream pressure from your compressed-air supply. This is the 300 size with a 3/8 in NPT port, built as the low-pressure (L) type so its adjustment range tops out at 0.4 MPa - the right choice for circuits and actuators that must never see full line pressure. It is ordered with the round external pressure gauge on an MPa scale, and the trailing T in the code specifies NPT threads. As a pure regulator it contains no filter, no bowl and no drain, so it should sit downstream of filtration if water or particulate is a concern.
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, standard and low-pressure types, gauge and thread options, and a panel-mountable body. We do not quote a single rated flow figure because AirTAC publishes flow as curves - ask us and we will confirm the datasheet figures for your application on request.
| Model | GR30010LJC1T AirTAC Regulator 3/8 in NPT, 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, MPa 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. |
| 1 | Gauge scale: MPa. 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 |
A 3/8 in low-pressure regulator on the machine's air panel holds a gentle, fixed supply pressure to sensitive actuators and gripper circuits, with the round MPa gauge giving the operator a visible setpoint.
On a bottling or carton line, low-pressure air keeps hold-down rollers and light clamps seated without crushing product; the regulator caps the circuit at a safe sub-line pressure.
A bench rig feeding air to instruments or sample fixtures needs a low, repeatable pressure; the low-pressure type with its 0.4 MPa ceiling and MPa gauge suits calibration and test stations.
Start with the port step: the 300 size with its 3/8 in NPT port suits lines above the 1/4 in level, but the right size ultimately depends on the flow your circuit needs, so have us check it against the flow curves before you order. The L code here means the low-pressure type, adjustable up to 0.4 MPa - choose the standard type instead if you need the full 0.05-0.9 MPa range. This unit ships the code with a round external gauge reading in MPa; square embedded gauges and psi or bar scales are the other catalogue choices. The T specifies NPT thread; PT and G (BSPP) are the alternatives, with PT as the catalogue standard. J means no mounting bracket is fitted, and the body is also panel-mountable. There is no bowl, drain or filter grade on any GR - those decisions belong to a separate filter unit.
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 rather than a single rated figure, so we do not quote a number. Tell us your inlet pressure, set pressure and the flow your circuit needs, and we will confirm the sizing against the datasheet curves on request before you order.
The GR family is regulation only - there is no filter, no bowl and no drain, so pair it with a GF filter upstream if your air carries water or dirt. The L in the code is the low-pressure type: its adjustment range tops out at 0.4 MPa instead of the standard type's 0.05-0.9 MPa, which is exactly what you want for circuits that must stay below full line pressure.
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.