The AirTAC GR30008LJC1T AirTAC Air 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.
GR30008LJC1T is an AirTAC GR-series air pressure regulator in size 300 with NPT1/4 ports. It does one job only: holding a steady downstream air pressure. This is the low-pressure (L) type, so its setting range goes up to 0.4 MPa, and it is supplied with a round pressure gauge scaled in MPa. A regulator has no filter, bowl or drain, and this unit comes without a mounting bracket; the GR body is also panel-mountable.
This is a genuine AirTAC part. The GR family is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, standard or low-pressure setting ranges, gauge or no gauge, PT, G or NPT threads, and with or without a bracket. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -20 to 70 C, wider than the rest of the G family. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| Model | GR30008LJC1T AirTAC Air 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, 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. |
|---|---|
| 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. |
| 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 · 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 |
Set a gentle, steady supply pressure for spray guns and air-assisted applicators, where the low-pressure setting range of this regulator suits gun and applicator supply lines.
Regulate air to low-pressure clamping and sealing cylinders on a packaging conveyor so jaw force stays consistent across the shift.
Supply a low, repeatable pressure to pneumatic clamps on an assembly fixture, protecting delicate parts from over-clamping.
Size 300 with 1/4 in ports sits in the mid range of the GR family; step up to 400 or 600, or down to 200, as your air demand dictates. The key decode here is the L: this low-pressure type sets up to 0.4 MPa, while the standard GR covers 0.05-0.9 MPa, so pick the type that matches your working pressure. You can also choose the gauge scale (MPa, psi or bar), the thread (PT is the standard, G or NPT are order options) and whether a bracket is fitted. Flow is published as curves, not a single rating, so send us your application details and we will confirm sizing 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 flow as curves rather than a single rated figure, so we do not quote a number here. Tell us your line pressure and air demand and we will confirm the sizing from the GR300 datasheet on request.
It marks the low-pressure type: the setting range goes up to 0.4 MPa instead of the standard GR range of 0.05-0.9 MPa. Choose the low-pressure type when your process works below that ceiling, and the standard type when you need the full range.
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.