The AirTAC GR40015LJC1T AirTAC Regulator NPT1/2 Low-Pressure 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 GR40015LJC1T is an AirTAC GR400 air pressure regulator in the 400 size with 1/2 in NPT ports. It is the low-pressure (L) type, so its set pressure range tops out at 0.4 MPa, and it comes fitted with an external round gauge scaled in MPa. Maximum working (inlet) pressure is 1.0 MPa (145 psi) and the operating temperature range is -20 to 70 C - wider than the rest of the G-series air-treatment family. As a GR unit it performs pressure regulation only: there is no filter, no drain bowl and no lubricator in this family. The J suffix means no mounting bracket is supplied, and GR regulators can also be panel-mounted.
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, and options include PT, G (BSPP) or NPT threads, standard or low-pressure regulation, gauge choice and scale, a reverse/check valve, and bracket or no-bracket mounting. Flow is published as curves rather than a single rated figure, so ask us and we will confirm the flow and datasheet figures for your application on request.
| Model | GR40015LJC1T AirTAC Regulator NPT1/2 Low-Pressure |
|---|---|
| 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 | Not fitted |
| 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. |
| (blank) | No reverse-flow valve (the default). |
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 packaging or assembly machine where light clamping force is set well below normal line pressure, this low-pressure GR400 regulator holds a stable reduced setting at the 1/2 in drop feeding the clamp cylinders.
A test rig or laboratory bench that needs a gentle, repeatable low set pressure on a 1/2 in line can use this unit, with the fitted MPa gauge giving a clear local readout of the regulated setting.
Where a conveyor line runs low-pressure air knives or blow-off nozzles off a 1/2 in branch, this regulator lets an operator dial in and hold the reduced pressure that the nozzles were set up for.
Start with the port step: this 400 size carries 1/2 in ports, and larger sizes move more air - match the size to the flow your line needs rather than to the pipe alone. Because this is the L (low-pressure) type with a 0.4 MPa ceiling, choose it where your set pressure sits low; if you need settings up to 0.9 MPa, the standard GR type is the right decode instead. The fitted round gauge is scaled in MPa; psi (scale 2) and bar (scale 3) versions exist if you prefer a different scale. Thread is NPT here as ordered, with PT (the standard) and G (BSPP) available as catalogue options. Bracket is omitted on this unit (J), though GR also panel-mounts. Flow is published as curves, not a single rating, so ask us to confirm sizing against your application before ordering.
Quick checklist
Without a reflux valve, air cannot flow back through the regulator — order the K option if reverse flow is required. A regulator does not remove water or particulate; that is the filter's job.
AirTAC publishes GR-series flow only as curves, not as a single rated number, so we do not quote a figure here. Tell us your line pressure, set pressure and expected air demand and we will confirm the flow from the datasheet curves for this exact 400-size, 1/2 in NPT unit on request.
The L in the code is the low-pressure regulator type: its adjustment range tops out at 0.4 MPa instead of the standard type's higher ceiling. Everything else decodes normally - 1/2 in NPT ports, 1.0 MPa maximum inlet pressure, -20 to 70 C operating range, fitted round MPa gauge and no mounting bracket. If your set pressure needs to go above 0.4 MPa, order the standard GR400 type instead.
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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.