The AirTAC GR40010LJF2TK AirTAC Air Pressure Regulator NPT 3/8 in 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 GR40010LJF2TK is an AirTAC GR-series air pressure regulator: it does one job, holding a steady downstream pressure from a compressed-air supply. There is no filter, no drain bowl and no lubricator in this unit - regulation only. This 400-size configuration carries a 3/8 in NPT port, is the low-pressure type with a setting range up to 0.4 MPa, and is supplied with the embedded square gauge scaled in psi. The K code adds a built-in reverse (check) valve, and the J code means no mounting bracket is fitted, though the GR body can also be panel-mounted.
This is a genuine AirTAC part. The GR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, in standard or low-pressure types, with gauge scale, thread (PT standard; G and NPT to order), bracket and reverse-valve options. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet figures against your application before ordering.
| Model | GR40010LJF2TK AirTAC Air Pressure Regulator NPT 3/8 in |
|---|---|
| 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 | Supplied without bracket |
| 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. |
| J | Supplied without bracket. |
| (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 |
Holds a reduced, steady supply pressure to clamping cylinders on a stamping or press cell, where the fixture is designed to grip at low force and the reverse valve keeps the clamp circuit pressurised if the main supply dips.
Regulates the air feeding low-pressure actuators and grippers on a packaging or cartoning line, with the square psi gauge giving operators a direct local readout of the set pressure.
Provides a stable reduced-pressure air supply to pilot valves, air bearings or dosing equipment on a process skid, where the circuit operates well below standard line pressure and a check valve protects the downstream side.
Choose the GR size by the port your line needs - this unit steps up to 400 size with a 3/8 in NPT port - and match it to the flow your circuit demands, which we can confirm from the published curves. Pick the low-pressure type (L) only when your setpoint stays at or below 0.4 MPa; for higher settings use the standard GR. Gauge scale is selectable (MPa, psi or bar) - this code is psi. Thread is PT as the catalogue standard, with G (BSPP) and NPT as order options - this unit is NPT. The J code omits the bracket, and K fits a reverse/check valve that holds downstream pressure if the upstream supply drops. Ask us to confirm sizing against the 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 curves, not as a single rated number, so we do not quote a rated flow, Cv or SCFM figure. Tell us your line size and required flow and we will confirm the sizing from the datasheet curves on request before you order.
The L in the code marks the low-pressure type of the GR series, whose setting range goes up to 0.4 MPa. It still accepts the full 1.0 MPa (145 psi) maximum inlet pressure, but if you need to set downstream pressure higher than 0.4 MPa, choose the standard-type GR instead.
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.