The AirTAC GR40015LF2TK AirTAC Low-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.
GR40015LF2TK is an AirTAC GR-series air pressure regulator: it does one job, holding a steady downstream air pressure from a variable supply line. This is the low-pressure type (code L), so its adjustment range goes up to 0.4 MPa, and it is built in the 400 size with a 1/2 in NPT port (code T). The code also specifies an embedded square pressure gauge reading in psi (F2), a built-in reverse/check valve (K), and the standard included mounting bracket, so the unit can be wall or bracket mounted and 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. As a regulator, it carries no filter, no bowl and no drain.
This is a genuine AirTAC part. The GR line spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, optional G (BSPP) or NPT threads, standard or low-pressure regulation, gauge scale choices, and an optional reverse/check valve. Flow figures for this series are published as curves rather than a single rated number, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GR40015LF2TK AirTAC Low-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 — 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. |
| (blank) | Fixing bracket included. |
| (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. |
| 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 |
Settling a steady, lower supply pressure to spray guns and air-assisted atomising lines in a finishing booth, where the process calls for a setpoint below the standard regulator range.
Holding a fixed, moderate clamping pressure on fixture cylinders of a CNC machining cell, with the check valve helping hold the set pressure if the main supply dips.
Regulating the low-pressure air feed to jet nozzles and tension rollers on a weaving line, where a stable, lower setpoint protects fabric handling.
Pick the GR size and port against the air consumption of the circuit it feeds: 400 is the second-largest of the four sizes (200/300/400/600) and this unit takes a 1/2 in NPT port. Choose the standard type for full-range adjustment or the low-pressure type (as here, up to 0.4 MPa) when the process needs a lower set pressure. Decide the gauge scale (MPa, psi or bar) and whether the embedded square gauge or the optional external round gauge suits the panel. Thread is PT as the AirTAC standard, with G (BSPP) and NPT as order options - this code is NPT. The bracket is included, and code K means a reverse/check valve is fitted so downstream pressure is held if the supply drops. Flow for this series is published as curves, not a single rating, so send us your flow and pressure requirements 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 GR flow as curves rather than a single rated number, so there is no one rated flow figure to quote. Send us your inlet pressure, set pressure and expected air consumption, and we will confirm the sizing from the datasheet curves on request before you order.
Code L means this is the low-pressure version of the GR: its adjustment range goes up to 0.4 MPa instead of the standard regulator range, for circuits that need a lower setpoint. GR is a regulator only - it has no filter, no bowl and no drain, so if you also need water and particle removal, pair it with a GF filter or step up to a GFR filter-regulator.
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.