The AirTAC GR30008LJC2T AirTAC Low-Pressure Regulator NPT1/4 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 PT1/4" 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 GR30008LJC2T is an AirTAC GR300 low-pressure air pressure regulator: it does one job, holding downstream pressure steady at a setpoint up to 0.4 MPa. There is no filter and no bowl in this unit - it is regulation only - so it is the right choice when the air is already filtered and you need fine control at reduced pressure. This configuration is the 300 size with a 1/4 in NPT thread, fitted with an external round gauge scaled in psi, and supplied without a mounting bracket; the GR body is also panel-mountable. Maximum inlet (working) pressure is 1.0 MPa (145 psi) and the operating temperature range is -20 to 70 C, wider than the rest of the G family.
This is a genuine AirTAC part. The GR series spans the 200/300/400/600 sizes with port sizes from 1/8 to 1 in, a standard type (0.05-0.9 MPa range) and this low-pressure type (up to 0.4 MPa), with gauge, thread and bracket options to order. Flow is published as curves rather than a single rating, so we confirm the datasheet figures for your application on request.
| Model | GR30008LJC2T AirTAC Low-Pressure Regulator NPT1/4 |
|---|---|
| Series | GR300 pressure regulator |
| Port size | PT1/4" (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, 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. |
|---|---|
| 08 | Port size PT1/4". 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. |
| 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 · PT1/4" · 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 spray guns that must run at reduced, stable pressure: the low-pressure type holds the setpoint below 0.4 MPa while the psi-scaled round gauge lets the painter read the setting directly.
Trimming the supply to air-jet and tensioning circuits on weaving and spinning lines, where the process calls for gentle, regulated pressure rather than full line pressure.
Providing a controlled low-pressure source on a lab or QA bench for leak and function testing of actuators and valves, with the round psi gauge giving a clear setpoint readout.
Start with the size and port: the 300 size with a 1/4 in connection suits lines where a 1/4 in drop is the norm, and the larger 400/600 sizes carry more flow - match the step to your demand rather than oversizing. Choose the low-pressure type (this unit) when the working setpoint sits at or below 0.4 MPa; the standard GR type covers 0.05-0.9 MPa. This unit has the round external gauge in psi; square embedded gauges and MPa or bar scales are the other catalogue choices. Thread is NPT here; PT is the standard and G (BSPP) is also an order option. Bracket: this code omits it, but the GR is panel-mountable if you prefer fixed mounting.
One honest note on sizing: regulator flow is published as curves, not a single rated figure, so we do not quote a number here. Ask us to confirm the curve data against your application before ordering.
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 figure, so we do not state a number here. Tell us your inlet pressure, setpoint and expected demand and we will confirm the curve data from the datasheet for your application on request.
The L in the code marks the low-pressure type: its adjustment range goes up to 0.4 MPa, instead of the 0.05-0.9 MPa of the standard GR. It suits circuits that operate at reduced pressure, such as spray or jet applications. Maximum inlet pressure is still 1.0 MPa (145 psi), and the round gauge fitted here is scaled in psi.
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.