The AirTAC GR40015LJF2 AirTAC Air Regulator, PT1/2, 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 GR40015LJF2 is an AirTAC GR-series air pressure regulator: it does one job, holding downstream pressure steady at the value you set. This unit is the 400 size with a PT1/2 (1/2 in) PT-threaded port, and it is the low-pressure (L) type, so its adjustment range tops out at 0.4 MPa - suited to circuits that must never see full-line pressure. A square pressure gauge with a psi scale is fitted as standard so the set point can be read directly at the unit. As a pure regulator it contains no filter element and no bowl; protect it upstream if the air supply carries water or particulate.
This is a genuine AirTAC part. The GR line spans the 200/300/400/600 sizes with ports from 1/8 to 1 inch, standard or low-pressure regulation, gauge scale choices, and PT, G (BSPP) or NPT threads to order. Rated flow for GR regulators is published as curves rather than a single figure, so ask us and we will confirm the datasheet numbers for your application before you order.
| Model | GR40015LJF2 AirTAC Air Regulator, PT1/2, Low Pressure |
|---|---|
| Series | GR400 pressure regulator |
| Port size | PT1/2" (PT 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. |
| (blank) | PT 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 cartoning or wrapping line where sealing jaws and light clamps must run well below full header pressure, the low-pressure GR40015LJF2 holds a gentle, stable set point at each 1/2-in branch off the main air ring.
Feeding hold-down cylinders and diverters on a bottling or parcel conveyor, this regulator keeps a fixed low pressure so products are gripped firmly but never marked, with the psi gauge letting operators verify the setting at a glance.
On a test bench or laboratory rig where instruments and pneumatic actuators need a repeatable low-pressure supply, the low-pressure type limits the adjustable ceiling to 0.4 MPa, protecting sensitive downstream equipment.
Start with the port and flow step: the 400 size with PT1/2 sits in the middle-upper part of the GR range, and the right size is the one whose flow curve covers your worst-case air demand with margin - we can check the curve against your consumption if you send the figures. This unit is the low-pressure type, so choose it only where the working set point stays at or below 0.4 MPa; for higher set points use the standard GR type. The fitted square gauge reads in psi; MPa or bar scales are available as options. Thread is PT as standard, with G (BSPP) and NPT orderable as catalogue options. This configuration has no mounting bracket (J) and GR bodies are also panel-mountable. Flow is published as curves, not a single rating, so confirm sizing with us 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 regulator flow as performance curves rather than a single rated figure, so we do not quote a l/min or SCFM number. Send us your air consumption and line conditions and we will confirm the datasheet curve and check the sizing for your application before you order.
The L type limits the adjustment range to a maximum of 0.4 MPa, which is the right choice for circuits that must never be set above that level. If your set point needs to go higher, order the standard GR type instead - the rest of the code (400 size, PT1/2 port, gauge) stays the same.
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.