The AirTAC GR40010LF2 AirTAC Air Regulator 3/8 in 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 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 GR40010LF2 is an AirTAC GR-series air pressure regulator: its only job is to hold a steady, reduced downstream pressure from your compressed-air supply. This is the 400 size with a PT3/8 (3/8 in) port, built as the low-pressure type, so its adjustment range tops out at 0.4 MPa - the right choice for circuits that must never see full line pressure. The trailing F2 in the code means an embedded square gauge is fitted, reading in psi, so operators can set and check the downstream pressure at a glance. Maximum inlet pressure is 1.0 MPa (145 psi), and the GR handles -20 to 70 C, a wider temperature window than the rest of the G family.
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, in standard and low-pressure types, with gauge and thread options to order. Flow is published as curves rather than a single rated figure, so ask us and we will confirm the datasheet figures for your application before you order.
| Model | GR40010LF2 AirTAC Air Regulator 3/8 in Low Pressure |
|---|---|
| Series | GR400 pressure regulator |
| Port size | PT3/8" (PT 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. |
| (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 · 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 |
Air knives and blow-off nozzles that dry or clear containers before labelling run best on a controlled, reduced supply. This low-pressure regulator caps the circuit at 0.4 MPa and the square psi gauge lets line staff verify the setting during changeover.
Pneumatic actuators that transfer samples or pressurise reagent lines need gentle, stable air. The low-pressure type protects delicate downstream devices, and the -20 to 70 C tolerance suits lab environments with wide ambient swings.
Hold-down clamps and toggle cylinders on a woodworking or jig table need consistent clamping force without over-pressurising the fixture. The 3/8 in port feeds the clamp circuit, the psi gauge confirms set pressure, and the included bracket mounts the unit at the bench.
Start with the port: this unit is PT3/8, and the 400 size is the step to consider when your line's flow demand outgrows a 1/4 in regulator - match the size to the flow your circuit actually needs. The L in this code marks the low-pressure type, limited to 0.4 MPa downstream; if your process needs the standard 0.05-0.9 MPa range, choose a GR without the L. The fitted square gauge here reads in psi; MPa and bar scales are also available, and an external round gauge is an option. Thread is PT as standard, with G (BSPP) and NPT as order options, and a mounting bracket is included - the GR is also panel-mountable. Flow is published as curves, not a single rating, so send us your application and we will confirm sizing against 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 regulator flow as performance curves rather than a single rated number, so there is no one l/min or SCFM figure we can quote. Send us your application details and we will confirm the datasheet curve figures for the GR400 at 3/8 in so you can size it correctly before ordering.
L marks the low-pressure type. Its adjustment range tops out at 0.4 MPa instead of the standard GR range of 0.05-0.9 MPa, which suits circuits that must never receive full line pressure. Maximum inlet pressure is still 1.0 MPa (145 psi). If you need the full standard range, order the GR400-10 without the L suffix.
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.