The AirTAC GR30010LJC2GK AirTAC Air Pressure Regulator, G3/8 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 GR30010LJC2GK is an AirTAC GR-series air pressure regulator in size 300 with G3/8 ports. This is the low-pressure (L) type, so it regulates outlet pressure up to 0.4 MPa, and it carries no bracket (J) for direct panel or manifold mounting - the GR body is also panel-mountable. A round pressure gauge with a psi scale is fitted (C2) so the set pressure can be read directly, and the built-in reverse/check valve (K) holds downstream pressure if the upstream supply is lost.
This is a genuine AirTAC part. The GR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, and is offered with standard or low-pressure regulation, a choice of gauge style and scale (MPa, psi or bar), an optional reverse/check valve, and PT, G or NPT threads. 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. Flow is published as curves rather than a single rating, so ask us to confirm flow figures against your application on request.
| Model | GR30010LJC2GK AirTAC Air Pressure Regulator, G3/8 |
|---|---|
| Series | GR300 pressure regulator |
| Port size | PT3/8" (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. |
|---|---|
| 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. |
| 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 · 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 |
Packaging machines that close, tuck or hold cartons with light-duty air cylinders often run best at reduced pressure. This low-pressure GR regulator sets and holds a gentle, stable downstream pressure so delicate products are not crushed during the clamp-and-hold cycle.
Diaphragm-actuated process valves and low-pressure pilot circuits need a steady, limited supply pressure rather than full line pressure. This size 300 regulator with 3/8-inch G ports and a fitted psi gauge gives operators a readable, adjustable set point up to 0.4 MPa.
Looms, winders and converting lines use low-pressure air for hold-down rollers, thread tensioners and air-bearing surfaces where excess pressure damages the web or thread. The check valve keeps the setting stable if the shop-air supply dips mid-shift.
Start with the port step: size 300 with G3/8 ports suits lines plumbed at 3/8 inch, and larger sizes (400, 600) give more flow capacity at the same pressure - match the size step to the air demand of the circuit. Choose the low-pressure (L) type only where the working pressure stays at or below 0.4 MPa; for higher set points use the standard GR. The fitted round gauge reads in psi; square embedded gauges and MPa or bar scales are the other catalogue options. Threads come as PT (standard), G or NPT - order the suffix that matches your piping. The K code adds a reverse/check valve, useful where downstream pressure must be held on supply loss; omit it if not needed. GR is also panel-mountable, and the J code here means no mounting bracket is supplied. Flow is published as curves, not a single rated figure, so ask us to confirm sizing against your 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 performance curves rather than a single rated figure, so we do not quote one number. Tell us your inlet pressure, set pressure and expected air demand, and we will confirm the flow from the datasheet curves on request before you order.
The L in the code marks the low-pressure type of the GR family, which regulates outlet pressure up to 0.4 MPa. If your application needs a higher set point, choose a standard GR regulator instead - the standard type regulates from 0.05 to 0.9 MPa in the same sizes and port options.
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.