The AirTAC GR40015LJF2T AirTAC Air Pressure 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 GR40015LJF2T is an AirTAC GR-series air pressure regulator for compressed air only. It performs regulation only - there is no filter, no bowl and no lubrication in this family. This unit is the size 400 body with a 1/2 in NPT port, the low-pressure type with an adjustment range up to 0.4 MPa, and a square pressure gauge on a psi scale fitted as standard. The trailing T in the code specifies the NPT thread option.
This is a genuine AirTAC part. The GR series spans sizes 200, 300, 400 and 600, with PT as the standard thread and G (BSPP) or NPT as order options, gauge scale choices of MPa, psi or bar, an optional reverse/check valve, and bracket or no-bracket mounting - GR is also panel-mountable. Flow is published as curves rather than a single rating, so we confirm datasheet figures on request.
| Model | GR40015LJF2T AirTAC Air Pressure 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 — square, psi 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). |
| F | Gauge shape: Square. 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. |
| (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 |
A spray-finishing line that runs atomising air at low setpoints uses this low-pressure GR regulator on the 1/2 in drop to keep gun supply steady without stepping down through a high-range valve.
A laboratory or pilot-plant air manifold feeding sensitive instruments uses this regulator to hold a gentle, repeatable low pressure on a 1/2 in branch, with the psi gauge giving a direct local reading.
A packaging line that uses low-pressure air to settle or cushion product uses this size 400 regulator on the machine's main 1/2 in feed, set well below the standard range ceiling.
Choose the GR size by port and required flow: this unit is size 400 with a 1/2 in NPT port. The L code makes it a low-pressure regulator, adjusted up to 0.4 MPa - pick this only if your circuit never needs higher setpoints; standard GR units adjust from 0.05 to 0.9 MPa. The square gauge on a psi scale is fitted; MPa or bar scales are available instead. Thread is NPT here, with PT standard and G (BSPP) as order options, and this configuration has no mounting bracket (J), though GR is panel-mountable. 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.
Flow for the GR series is published as curves, not as a single rated figure, so we do not quote a number here. Ask us and we will confirm the datasheet flow curve for the size 400 body against your inlet pressure and setpoint before you order.
The L in the code marks the low-pressure type of the GR series, whose adjustment range tops out at 0.4 MPa. If your process needs setpoints above that, choose a standard GR unit, which adjusts from 0.05 to 0.9 MPa. All GR units take a maximum inlet pressure of 1.0 MPa (145 psi) and operate from -20 to 70 C.
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.