The AirTAC GR40010LF2T AirTAC Low-Pressure Regulator 3/8 in NPT 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 PT3/8" 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 GR40010LF2T is an AirTAC GR-series air pressure regulator: it does one job, holding a stable downstream pressure from a compressed-air supply, and it contains no filter, no bowl and no lubricator. This unit is the 400 size with a 3/8 in NPT port and is the low-pressure (L) type, so its setting range tops out at 0.4 MPa - suited to circuits that must never see full-line pressure. It carries a maximum inlet pressure of 1.0 MPa (145 psi), operates from -20 to 70 C (the widest temperature window in the G family), and ships as configured with an embedded square gauge reading in psi; an external round gauge is available as an option. A mounting bracket is included, and the GR400 can also be panel-mounted.
This is a genuine AirTAC part. The GR family spans the 200, 300, 400 and 600 sizes with port sizes from 1/8 in to 1 in, standard and low-pressure variants, gauge scale choices, and PT, G (BSPP) or NPT threads to order. Flow for this series is published as curves rather than a single rated figure, so ask us and we will confirm the datasheet figures against your application before you order.
| Model | GR40010LF2T AirTAC Low-Pressure Regulator 3/8 in NPT |
|---|---|
| Series | GR400 pressure regulator |
| Port size | PT3/8" (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 | 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. |
|---|---|
| 10 | Port size PT3/8". 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. |
| (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 · PT3/8" · 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 carton-sealing line, the dispensing head needs a gently held supply pressure well below main-line level. The low-pressure GR40010LF2T regulates the branch down to 0.4 MPa or less and holds it steady with its psi gauge in view at the machine.
Fixture clamps on a fabrication cell need a fixed, repeatable clamp pressure rather than full header pressure. This 3/8 in NPT regulator sits at the fixture drop, set once on the square psi gauge so every cycle clamps at the same pressure.
Bench-top test rigs and analytical instruments often require a low, stable air pressure that the shop main cannot provide directly. The low-pressure type limits the circuit to 0.4 MPa, and the -20 to 70 C operating window suits unconditioned lab spaces.
Start with the port: this unit steps up to 3/8 in in the 400 size, and the right size is the one whose flow curve covers your demand at an acceptable pressure drop - larger sizes carry more flow at the same drop. Choose the low-pressure (L) type only when your setpoint stays at or below 0.4 MPa; for higher setpoints the standard GR type covers up to 0.9 MPa. This configuration reads psi on the embedded square gauge; MPa and bar scales and an external round gauge are the other gauge choices. Thread is NPT here; PT (standard) and G (BSPP) versions are orderable options, and a J-suffix version without bracket exists if you panel-mount. Because flow is published as curves, not a single rating, send us your flow and pressure requirements and we will confirm sizing from the datasheet before you order.
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-series flow as curves, not as a single rated number, so we do not quote a flow figure for this model. Send us your required flow and upstream/downstream pressures and we will confirm from the datasheet curve whether the 400 size at 3/8 in NPT is correctly sized before you order.
The L suffix means the setting range tops out at 0.4 MPa, which protects circuits that must never receive full-line pressure. If your setpoint needs to go higher, the standard GR type covers up to 0.9 MPa - tell us your setpoint and we will point you to the right variant.
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.