The AirTAC GR40015LJC3TK AirTAC Air 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 GR40015LJC3TK is a genuine AirTAC GR400 series air pressure regulator: it does one job, holding a steady downstream air pressure, and nothing else. This is the low-pressure type, so the set point can be adjusted up to 0.4 MPa, which suits lines and actuators that must not see full shop pressure. The 400 size takes a 1/2 inch NPT port (PT is the standard thread; G and NPT are order options), and the code confirms a round pressure gauge on a bar scale, a built-in reverse/check valve so backflow cannot upset the setting, and no mounting bracket - the body is also panel-mountable. As a pure regulator it has no filter bowl and no drain.
This is a genuine AirTAC part. The GR400 sits in a range that runs from the 200 size up to 600, with port sizes, gauge scales (MPa, psi or bar), bracket and check-valve options selectable per code. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -20 to 70 C, wider than the rest of the G family. Flow is published as curves rather than a single rated figure, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GR40015LJC3TK AirTAC Air 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, bar 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. |
| 3 | Gauge scale: bar. 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 |
Clamp cylinders on a CNC fixture often need a gentle, repeatable holding pressure rather than full line pressure. This low-pressure regulator lets the setter dial in a set point up to 0.4 MPa on the bar gauge, and the check valve keeps the clamp force steady if the main supply dips mid-cycle.
Clearing dust or stray film off cartons on a conveyor line calls for a controlled, low-pressure air jet. The 1/2 inch NPT port feeds a blow-off manifold, the low-pressure type keeps the jet below 0.4 MPa so labels and product are not damaged, and the bar gauge gives the operator a visible set point.
Pick-and-place and screwdriver stations on an assembly line behave best when each station gets its own regulated feed. Mounted panel-style at the station, this 1/2 inch regulator holds a fixed downstream pressure, and the built-in reverse/check valve stops the station losing its setting when the shared header pressure fluctuates.
Start with the port and flow step: the 400 size carries a 1/2 inch port, one step up from the 300, so step up if your line draws more air than the smaller bodies are sized for. Because this is the L (low-pressure) type, choose it where the working set point stays at or below 0.4 MPa; for higher set points use the standard GR. The trailing T gives NPT threads - if your piping is PT or G(BSPP), order that variant instead. This code carries a round gauge on a bar scale; square embedded gauges and MPa/psi scales are the other catalogue choices. The K option adds a reverse/check valve, useful wherever a supply dip must not dump the downstream setting, and J means no bracket is fitted, though the body can still be panel-mounted. Flow is published as curves, not a single rating, so send us your air demand and we will confirm the right size against the datasheet 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 curves rather than a single rated number, so there is no one figure we can honestly quote. Tell us your working pressure, set point and air demand, and we will confirm the flow figures from the GR400 datasheet for your application on request before you order.
L marks the low-pressure type of the GR regulator. It adjusts up to 0.4 MPa, instead of the standard type's wider range, which suits circuits that must never see full line pressure. Maximum inlet pressure is still 1.0 MPa (145 psi), and this unit reads its fitted round gauge in bar. If you need set points above 0.4 MPa, order the standard GR 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.