The AirTAC GR40015LJF2GK AirTAC Low-Pressure Regulator, G1/2 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 GR40015LJF2GK is an AirTAC GR400 series air pressure regulator in the larger size 400 body with a G1/2 (BSPP) threaded port. This is the low-pressure (L) type, so its adjustment range tops out at 0.4 MPa instead of the standard regulator range, making it the right choice for circuits that must never see full line pressure. It is supplied with an embedded square pressure gauge reading in psi and a built-in reverse (check) valve, and it carries no mounting bracket as configured, though the GR series is also panel-mountable. 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 family.
This is a genuine AirTAC part. The GR series spans sizes 200, 300, 400 and 600 with port sizes from 1/8" to 1", and is available in standard or low-pressure types, with or without a gauge, with MPa, psi or bar gauge scales, with a reverse valve, and in PT, G or NPT threads. Because AirTAC publishes regulator flow only as curves rather than a single rated figure, we confirm flow and datasheet figures for your application on request.
| Model | GR40015LJF2GK AirTAC Low-Pressure Regulator, G1/2 |
|---|---|
| Series | GR400 pressure regulator |
| Port size | PT1/2" (G (BSPP) 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 | 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). |
| F | Gauge shape: Square. C is round, F is square. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| G | G (BSPP) 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 station where the clamps are rated well below full shop-air pressure, this low-pressure regulator holds the circuit at a safe setting up to 0.4 MPa, with the built-in check valve helping hold the set pressure if upstream supply dips.
Heat-seal and forming stations on packaging lines often need a gentle, stable air supply rather than full line pressure. This size 400 regulator with a 1/2" port and psi gauge lets operators read and set the pressure directly at the machine.
Air-assist and low-pressure actuation circuits on machine tools and presses benefit from a dedicated regulator set below main line pressure. Panel mounting and the 1/2" G-threaded port make it straightforward to drop into an existing supply drop.
Start with the port step: size 400 with a 1/2" port suits lines running higher air demand, and stepping up or down through the 200/300/400/600 range changes both port size and flow capacity, so match the size to your supply line rather than guessing. This unit is the low-pressure (L) type with adjustment up to 0.4 MPa - choose it only where the downstream circuit is rated for 0.4 MPa or less; for general circuits up to 0.9 MPa, pick the standard GR type instead. The fitted square gauge reads in psi; MPa and bar scales are catalogue alternatives. Thread here is G (BSPP), while PT (standard) and NPT are orderable options. The J code means no mounting bracket is supplied, and the K code adds a reverse/check valve.
One honest note on sizing: AirTAC publishes regulator flow as curves, not a single rated number, so we do not quote a rated flow figure here. Ask us to confirm the flow curve and datasheet figures against your application before you order.
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 rather than a single rated figure, so we do not state a rated flow number for this unit. Contact us and we will confirm the flow curve and datasheet figures for the GR400 size against your application before you order.
The L in the code marks the low-pressure type, whose adjustment range tops out at 0.4 MPa - intended for circuits that must not see full line pressure. If your circuit needs up to 0.9 MPa, the standard GR400 regulator in the same size and port is the correct choice instead.
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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.