The AirTAC GR30010LJC3TK AirTAC Low-Pressure Regulator NPT3/8 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 GR30010LJC3TK is an AirTAC GR-series air pressure regulator: it does one job, holding a stable downstream pressure from a compressed-air supply. This unit is the size GR300 body with a 3/8 in NPT port, built as the low-pressure type with an adjustment range up to 0.4 MPa, so it suits circuits that must never see full line pressure. It carries a maximum inlet pressure of 1.0 MPa (145 psi), operates from -20 to 70 C, and is fitted with an external round gauge scaled in bar plus a reverse/check valve. No mounting bracket is included, and as a GR it is also panel-mountable. Being a pure regulator, it contains no filter, no bowl and no drain.
This is a genuine AirTAC part. The GR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, in standard or low-pressure types, with gauge, thread and bracket options to match. Flow is published as curves rather than a single rated figure, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GR30010LJC3TK AirTAC Low-Pressure Regulator NPT3/8 |
|---|---|
| Series | GR300 pressure regulator |
| Port size | PT3/8" (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, bar 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. |
| 3 | Gauge scale: bar. 1 is MPa, 2 is psi, 3 is bar. |
| T | NPT 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 |
Jet-nozzle circuits on an air-jet loom run at a deliberately low pressure below the mill's main line. This low-pressure GR300 regulator holds that setting, and the bar-scaled round gauge lets the weaver verify the setting at a glance during shift checks.
Powder delivery and booth air-knife circuits in a coating line need a gentle, stable supply well under main header pressure. Set the GR30010LJC3TK once at the booth drop and the check valve keeps the setting from being disturbed when the upstream side is shut off between batches.
Tray-sealing and clamshell-closing heads on a food-packaging conveyor use low-pressure air so delicate packs are not crushed. This regulator on the drop to the sealing station holds that gentle pressure, with the 3/8 in NPT port suiting a mid-size machine supply.
Start with the port step: size 200 through 600 covers 1/8 in to 1 in, and the right size is the one whose flow curve covers your demand at an acceptable pressure drop - we can check that against the datasheet before you order. This code is the low-pressure type (L), limited to 0.4 MPa downstream; choose the standard type instead if you need the full 0.05-0.9 MPa range. The round gauge here is scaled in bar; MPa and psi scales are also available, and an embedded square gauge is the alternative style. Thread is NPT on this unit, with PT (the standard) and G as orderable options. The J code means no bracket; order the bracket version if you want panel-free mounting. Because the K code fits a reverse/check valve, downstream pressure is held if the upstream side is vented - delete the K if you do not want that behaviour. Flow is published as curves, not a single rating, 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 curves, not as a single rated number, so there is no one figure we can honestly quote. Send us your line pressure, downstream set point and air demand, and we will confirm the flow curve from the datasheet and check the sizing for you on request.
L is the low-pressure type of the GR series: its adjustment range tops out at 0.4 MPa instead of the standard type's 0.05-0.9 MPa. It is the right choice when the circuit must be physically limited to low pressure, such as jet, coating or delicate-handling applications. If you need settings above 0.4 MPa, order the standard GR type instead.
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.