The AirTAC GR30008LJC2TK 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 AirTAC GR30008LJC2TK is a size 300 air pressure regulator with 1/4 in NPT ports, built for circuits that must run below the standard set range: the low-pressure type adjusts up to 0.4 MPa (58 psi). The trailing K in the code means a reverse (check) valve is fitted, so the downstream setting is held if upstream supply dips. This configuration carries an external round gauge reading in psi, and the J code means no mounting bracket is supplied - the GR body is also panel-mountable. Max 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 family.
This is a genuine AirTAC part from the GR regulator series, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in. Standard and low-pressure types, PT, G and NPT threads, gauge scales in MPa, psi or bar, and bracket or no-bracket versions are all decodable from the model code. Flow is published as curves rather than a single rated figure, so ask us to confirm sizing or any datasheet figure for your application before ordering.
| Model | GR30008LJC2TK 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, 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. |
| 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 |
Sets a gentle, repeatable clamp pressure below 0.4 MPa on fixture cylinders, while the fitted check valve holds the clamp setting if the shop-air supply dips mid-cycle.
Feeds light-duty packaging cylinders and gates that run at reduced pressure, with the round psi gauge letting line staff read and reset the setting without converting units.
Regulates low-pressure atomizing or purge air to bench-top spray and test chambers, where the wide -20 to 70 C range and fine low-pressure adjustment suit sensitive setups.
Start with the port step: this unit is size 300 with 1/4 in NPT ports; larger sizes (400, 600) move to 3/8 in, 1/2 in and above for higher air demand, but because flow is published as curves rather than a single rating, ask us to confirm sizing against your application before ordering. Choose the regulator type by set pressure: the L code here is the low-pressure type, adjusting up to 0.4 MPa; standard GR types adjust up to 0.9 MPa. The K code adds a reverse/check valve - useful where the downstream setting must survive a supply dip. Pick the gauge scale (MPa, psi or bar; this unit reads psi) and the thread: PT is the standard, while G (BSPP) and NPT are catalogue options to order. Bracket or no-bracket versions exist; this code is no-bracket and the GR is also panel-mountable.
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 GR flow as curves, not as a single rated figure, so we do not quote a rated flow, Cv or SCFM number for this unit. Tell us your application and we will confirm the flow figures from the datasheet on request before you order.
L is the low-pressure regulator type, which adjusts up to 0.4 MPa instead of the standard range, and K means a reverse (check) valve is fitted so the downstream setting is held if upstream supply drops. The C2 in the code is the external round gauge with a psi scale.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models are processed and dispatched in 3-5 business 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.