The AirTAC GR30008LJC2 AirTAC Low-Pressure Air Regulator, PT1/4 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 GR30008LJC2 is an AirTAC GR-series air pressure regulator: it does one job, holding downstream pressure steady, and it contains no filter, no bowl and no lubricator. This unit is the low-pressure type, adjustable up to 0.4 MPa, in the 300 size with a PT1/4 (1/4 in) port. It is supplied with an external round pressure gauge scaled in psi, and without a mounting bracket; the GR body is also panel-mountable. 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-series families.
This is a genuine AirTAC part. The GR family spans the 200, 300, 400 and 600 sizes with port sizes from 1/8 to 1 in, in standard and low-pressure types, with your choice of gauge, scale, thread and bracket options. Because flow is published only as curves rather than a single rated figure, we confirm the datasheet and flow figures for your application on request.
| Model | GR30008LJC2 AirTAC Low-Pressure Air Regulator, PT1/4 |
|---|---|
| Series | GR300 pressure regulator |
| Port size | PT1/4" (PT 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. |
| (blank) | PT 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 |
Delicate product-hold-down clamps on a cartoning or wrapping machine need a set pressure well below normal line pressure. This low-pressure GR regulator on the 1/4 in branch keeps the clamp force gentle and repeatable, with the psi gauge letting operators check the setting at a glance.
Bench-top process rigs and test stations often run pneumatic actuators and air jets at low, carefully held pressures. Mounted in the 1/4 in supply line, this regulator holds the set point up to 0.4 MPa across a -20 to 70 C envelope, and panel mounting keeps it accessible at the station.
Positioners and pilot-operated process valves depend on a stable, low pilot pressure to seat and modulate correctly. This regulator installed ahead of the pilot circuit in the 1/4 in line holds that pressure steady, with the round psi gauge confirming the setting during commissioning.
Start with the port step: the 300 size with its 1/4 in port suits lines running at moderate air demand, while 200, 400 and 600 sizes step up or down. Choose the low-pressure type (L) only where the circuit must never be set above 0.4 MPa; the standard GR covers 0.05 to 0.9 MPa. Pick the gauge and its scale - MPa, psi or bar - to match what your operators read, and match the thread to your piping: PT is the standard here, with G (BSPP) and NPT available as order options. Bracketless (J) versions suit panel mounting. Because flow is published as curves rather than a single rating, ask us to confirm sizing 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 rather than a single rated number, so we do not quote a figure here. Tell us your inlet pressure, set pressure and expected air demand, and we will confirm the flow from the datasheet for this exact model before you order.
The L type limits the adjustment range to a maximum of 0.4 MPa, which suits circuits that must never be set high - clamping, pilot air and similar duties. The standard GR300 covers 0.05 to 0.9 MPa. Both share the same 1/4 in port, 1.0 MPa maximum inlet and -20 to 70 C temperature range; pick the type that matches your circuit's ceiling.
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.