The AirTAC GR400-15LJC1TK AirTAC Low-Pressure Air Regulator NPT1/2 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 PT1/2" 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 GR400-15LJC1TK is an AirTAC GR-series air pressure regulator: it does one job, holding downstream pressure steady in a compressed-air line. This is the low-pressure type, so it adjusts outlet pressure up to 0.4 MPa, and it is built in the 400 size with 1/2 in NPT ports. The code also specifies a round pressure gauge scaled in MPa, a built-in reverse (check) valve that keeps downstream pressure from backing up through the unit, and no mounting bracket - the GR body can also be panel-mounted.
This is a genuine AirTAC part. The GR family spans the 200, 300, 400 and 600 sizes with port sizes from 1/8 in to 1 in, and can be ordered in standard or low-pressure type, with or without gauge, bracket or check valve, and with G, NPT or PT threads. Flow is published as curves rather than a single rated figure, so ask us and we will confirm the datasheet figures for your application.
| Model | GR400-15LJC1TK AirTAC Low-Pressure Air Regulator NPT1/2 |
|---|---|
| Series | GR400 pressure regulator |
| Port size | PT1/2" (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.
| GR400 | G-series pressure regulator, 400 body — sets the port range. |
|---|---|
| 15 | Port size PT1/2". This body offers 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 | GR400 · PT1/2" · 0.05 - 0.4 MPa (7 - 58 psi) |
|---|---|
| One size down | GR300 |
| One size up | GR600 |
| Line order | Filter first, then regulator, then lubricator |
On a fixture-clamping manifold that must never see more than 0.4 MPa, this low-pressure regulator holds the clamping pressure steady, with the built-in check valve keeping the circuit from losing pressure if upstream supply dips.
A bottle-rinsing or blow-off station that needs gentle, repeatable air pressure can be set locally with this 1/2 in NPT regulator, and the round MPa gauge lets an operator verify the setting at a glance.
Hold-down and guide rollers on a packaging conveyor run best at a fixed low pressure; this regulator keeps that pressure constant through the shift, and panel mounting lets it sit beside the other line controls.
Start with size and port: the 400 size with 1/2 in ports sits in the middle of the GR range, and the right step depends on the flow your line needs - we can check the published flow curves against your demand before you order. Then pick the regulator type: this unit is the low-pressure (L) type, adjusting up to 0.4 MPa; the standard type covers 0.05-0.9 MPa. Choose the gauge and its scale (MPa, psi or bar), the thread (PT is the standard, G and NPT are order options - this unit is NPT), whether a bracket is wanted, and whether a reverse/check valve is fitted (it is, on this code).
Because AirTAC publishes flow as curves and not a single rating, 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 quote. Send us your line pressure, set pressure and expected air demand, and we will confirm the sizing from the datasheet curves before you order.
The L in the code marks the low-pressure type of the GR family, which adjusts outlet pressure up to 0.4 MPa. If your application needs the full 0.05-0.9 MPa range, the standard GR type is the right choice instead - we can quote it in the same size and port.
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.