The AirTAC GR30008LJC1TK AirTAC Low-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.
The GR30008LJC1TK is an AirTAC GR-series pressure regulator: it does one job, holding a stable downstream air pressure, and it contains no filter, no drain bowl and no lubricator. This configuration is the low-pressure (L) type, so its setpoint range tops out at 0.4 MPa, and it is built with 1/4 in NPT ports. It leaves the factory with a round pressure gauge on an MPa scale, a reverse/check valve (K) fitted so downstream pressure is held if the supply side drops, and no mounting bracket - the GR body is also panel-mountable when you want it fixed to a machine plate.
This is a genuine AirTAC part from the GR300 size class. Across the GR line you can step up or down through the 200/300/400/600 sizes, choose PT, G (BSPP) or NPT threads, order the standard or low-pressure regulator type, add or omit the gauge and bracket, and fit a reverse/check valve where the circuit needs one. Flow is published by AirTAC as curves rather than a single rated figure, so ask us and we will confirm the datasheet numbers for your application before you order.
| Model | GR30008LJC1TK AirTAC Low-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 | 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. |
| 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. |
| 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 |
On a carton-sealing or wrapping machine where delicate pneumatic actuators run at reduced pressure, the low-pressure GR300 sets and holds a stable setpoint at or below 0.4 MPa, with the built-in check valve keeping the circuit pressurised if the main supply dips.
A low-pressure blow-off or air knife station on a food or bottle conveyor needs a steady, moderate pressure rather than full line pressure; this 1/4 in NPT regulator with its MPa gauge lets an operator set and read the exact blowing pressure at the point of use.
Pneumatic clamps and hold-downs on a welding or assembly fixture often work best at a gentler pressure to avoid distorting thin sheet; the GR30008LJC1TK regulates that branch independently, and the reverse/check valve holds clamp force through a momentary supply loss.
Start with the port size: this unit is the 300 size with 1/4 in NPT ports, and the GR family steps through 200, 300, 400 and 600 as port and flow capacity grow - size against the air demand of the circuit rather than the pipe alone. Because this is the L (low-pressure) type, it is the right pick only where the working setpoint stays at or below 0.4 MPa; for higher setpoints choose the standard GR type. The fitted round gauge reads in MPa; psi and bar scales are available if your operators work in those units. Thread is NPT here, with PT (the AirTAC standard) and G (BSPP) as orderable options. No bracket is fitted on this code, and the K code means a reverse/check valve is built in - useful wherever a sudden supply drop must not dump the downstream pressure. One honest note before you order: AirTAC publishes regulator flow as curves, not a single rating, so send us your flow and pressure requirements and we will confirm the sizing from the datasheet.
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, not as a single rated number, so there is no one flow figure we can honestly quote. Tell us your upstream pressure, setpoint and required air consumption, and we will confirm the sizing from the GR300 datasheet on request before you order.
The L code on GR30008LJC1TK means the regulator is the low-pressure type, with a setpoint range that tops out at 0.4 MPa - the right choice for circuits that must never run above that. If your process needs setpoints up to 0.9 MPa, order the standard GR300 type instead; everything else about this configuration (NPT1/4 ports, round MPa gauge, check valve, no bracket) stays the same.
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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.