The AirTAC GR40015LC3TK 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 GR40015LC3TK is an AirTAC GR-series air pressure regulator: its only job is to hold a steady downstream air pressure, with no filtration and no lubrication. This size 400 unit has 1/2 in NPT ports and is the low-pressure (L) type, so its adjustment range tops out at 0.4 MPa - the right choice for circuits that must never see full line pressure. It is fitted with an external round pressure gauge reading in bar (C3), a reverse/check valve (K) that holds the downstream setting when upstream supply is lost, and a mounting bracket; the GR body is also panel-mountable. 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.
This is a genuine AirTAC part. The GR line spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, in standard or low-pressure types, with or without gauge, bracket or check valve, and in PT (standard), G(BSPP) or NPT thread. Flow is published as curves rather than a single rating, so ask us to confirm the flow and datasheet figures for your application before ordering.
| Model | GR40015LC3TK 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 | Fixing bracket included |
| 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. |
| (blank) | Fixing bracket included. |
| (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 |
On a fixture-clamping or workholding circuit where actuators are rated well below full line pressure, the low-pressure type caps the setting at 0.4 MPa, and the check valve holds the clamp pressure if the upstream supply drops.
Feeding spray or coating equipment that requires a gentle, stable supply, this 1/2 in regulator steps machine air down to a low working pressure, with the bar-scaled round gauge giving operators a clear local reading.
Mounted on a panel or via the included bracket at the machine's air preparation point, it regulates the branch feeding downstream valves and cylinders, with the check valve preventing backflow from disturbing the set pressure.
Size and port are the first choice: 200/300/400/600 step up in port and flow capacity, and this unit is size 400 with 1/2 in NPT ports. Next, pick the regulator type - the standard GR adjusts up to 0.9 MPa, while this low-pressure (L) type is limited to 0.4 MPa for circuits that need a capped setting. Choose the gauge: embedded square or external round, scaled in MPa, psi or bar (this unit: round, bar). Decide whether a reverse/check valve (K) is wanted to hold downstream pressure, and whether the bracket is needed - GR is also panel-mountable. Thread is PT as the catalogue standard; G(BSPP) and NPT are orderable options, and this unit is specified in NPT. Flow is published as curves, not a single rated figure, so send us your application and we will confirm sizing 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, not as a single rated number, so we do not quote a rated flow, Cv or SCFM figure. Tell us your application and we will confirm the flow and datasheet figures for the GR400 size against your requirement before you order.
The L code means the adjustment range is capped at 0.4 MPa instead of the standard GR range, which suits circuits whose actuators or process must never be exposed to full line pressure. Maximum inlet pressure is still 1.0 MPa (145 psi), and the round gauge on this unit reads the outlet in bar.
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.