The AirTAC GR40010LF2TK AirTAC Air Regulator NPT3/8 Low-Pressure Type 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.
GR40010LF2TK is an AirTAC GR-series air pressure regulator: it does one job, holding your downstream pressure steady at the setting you dial in, and it contains no filter, no bowl and no lubricator. This 400-size unit is built for a 3/8 in NPT port and is the low-pressure (L) type, so its adjustment range tops out at 0.4 MPa - the right choice for circuits that run well below standard line pressure. The F2 code brings a square pressure gauge reading in psi, and the K code means a reverse (check) valve is fitted. 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 200, 300, 400 and 600 sizes with port options from 1/8 in to 1 in, standard or low-pressure regulation, gauge or no gauge, and PT, G or NPT threads. Because AirTAC publishes flow only as curves rather than a single rated figure, we confirm the datasheet and flow figures for your application on request.
| Model | GR40010LF2TK AirTAC Air Regulator NPT3/8 Low-Pressure Type |
|---|---|
| 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 | 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. |
|---|---|
| 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. |
| 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 · 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 |
Clamp and hold-down cylinders on carton-sealing or case-packing machines often run at gentle pressures to avoid crushing product. This low-pressure regulator lets an operator dial and hold a setting up to 0.4 MPa at the 3/8 in drop feeding the clamp circuit.
Air-film parts feeders, low-force press fixtures and gentle lift assists on an assembly bench need steady, modest pressure rather than full line pressure. The psi-reading square gauge gives operators a direct local setting at the point of use.
On a plant distribution loop, individual machine drops fed in 3/8 in NPT can be set independently with this 400-size regulator, while the fitted reverse (check) valve guards the branch against backflow from the machine side.
Start with the port step: this unit is 400 size with a 3/8 in NPT port, and the GR family steps 200/300/400/600 through 1/8 in to 1 in as flow demand grows. Because you chose the L (low-pressure) type, the setting range tops out at 0.4 MPa - if your process needs to regulate above that, the standard GR type (range up to 0.9 MPa) is the correct pick instead. The square gauge reads in psi; MPa and bar scales are also available, and an external round gauge is an option. Thread is NPT here; PT is the catalogue standard and G (BSPP) can be ordered. A mounting bracket is included, and GR is also panel-mountable. Flow is published as curves, not a single rating, so ask us to confirm sizing against your application before ordering.
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 performance curves rather than a single rated figure, so we do not quote a number. Tell us your line pressure, set pressure and the flow your application needs, and we will confirm the correct size and the datasheet figures on request before you order.
The L in the code marks the low-pressure version: its adjustment range tops out at 0.4 MPa instead of the standard type's higher range. It suits circuits that run well below normal plant pressure. Maximum inlet pressure is still 1.0 MPa (145 psi), and the working temperature range is -20 to 70 C.
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.