The AirTAC GR30008LJC2GK AirTAC Air Pressure Regulator G1/4 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 GR30008LJC2GK is an AirTAC GR-series air pressure regulator: regulation only, with no filter element and no bowl. This configuration is the low-pressure type, with an adjustment range up to 0.4 MPa, suited to circuits that must run below the standard regulator span. It carries a 1/4 inch port with G (BSPP) thread, an external round pressure gauge scaled in psi, and a built-in reverse (check) valve that holds the downstream setting when upstream supply is lost. Maximum inlet pressure is 1.0 MPa (145 psi), operating temperature is -20 to 70 C, and the unit is supplied without a mounting bracket, though GR regulators are also panel-mountable.
This is a genuine AirTAC part from the GR300 size class within a range spanning sizes 200, 300, 400 and 600, with larger sizes carrying larger ports and more flow. Standard and low-pressure regulator types, gauge scales in MPa, psi or bar, PT, G or NPT threads, bracket and check-valve options are all available in the family. Flow is published as curves rather than a single rated figure, so we confirm datasheet and sizing figures on request.
| Model | GR30008LJC2GK AirTAC Air Pressure Regulator G1/4 |
|---|---|
| Series | GR300 pressure regulator |
| Port size | PT1/4" (G (BSPP) 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 | Fitted (reverse flow permitted) |
| 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. |
| G | G (BSPP) thread. PT is the default; G is BSPP and T is NPT. |
| K | Reverse-flow (reflux) valve fitted. |
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, stable holding pressure for pneumatic clamps and work supports on a machining fixture, where full line pressure would mark or distort the finished part.
Feed sample-handling pneumatics and instrument purge lines in a laboratory at a low, closely held pressure, with the psi gauge giving a direct local readout at the bench.
Provide a reduced, check-valve-protected pilot pressure to positioners and actuated control valves on a process skid, holding the setting if the main air header dips.
Start with the port step: this unit is size 300 with a 1/4 inch G-threaded port, and the GR family steps through 200/300/400/600 with ports from 1/8 to 1 inch, so match the size to the air demand of the circuit - we can check the flow curve against your application before you order. This code specifies the low-pressure (L) type, which regulates up to 0.4 MPa; choose the standard type if you need settings up to 0.9 MPa. The round gauge here is scaled in psi, and MPa or bar scales are order options. Thread is G (BSPP) on this unit; PT is the standard thread and NPT is also available to order. The K code adds a reverse/check valve, and the J code means no mounting bracket is included. Flow is published as curves, not a single rating, so ask us to confirm sizing against the application before ordering.
Quick checklist
The reflux valve lets air flow back through the regulator, which is useful when downstream volume must vent quickly. A regulator does not remove water or particulate; that is the filter's job.
AirTAC publishes regulator flow as characteristic curves rather than a single rated figure, so there is no one rated-flow number we can quote. Tell us your line pressure, set pressure and the air demand of the circuit, and we will confirm the sizing from the datasheet curves on request before you order.
L marks the low-pressure regulator type, which adjusts up to 0.4 MPa instead of the standard type's wider range - the right choice when the circuit must run at low set pressures. C2 specifies the external round gauge scaled in psi; square embedded gauges and MPa or bar scales are alternative options in the GR 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.