The AirTAC GR30010LJF3TK AirTAC Low-Pressure Regulator NPT3/8 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 GR30010LJF3TK is an AirTAC GR-series air pressure regulator: it does one job, holding a steady downstream air pressure from a compressed-air supply. This is the low-pressure type, adjustable up to 0.4 MPa, in the 300 size with a 3/8 in NPT port. The code also specifies a fitted embedded square gauge reading in bar, a reverse (check) valve that holds downstream pressure when the upstream supply drops, and no mounting bracket - the GR body is also panel-mountable. Like every GR unit it is regulation only: there is no filter, no bowl and no lubricator in this family.
This is a genuine AirTAC part. The GR line spans the 200, 300, 400 and 600 sizes with port sizes from 1/8 in to 1 in, standard or low-pressure adjustment, gauge and thread options, and a check-valve variant. AirTAC publishes regulator flow as curves rather than a single rated figure, so ask us to confirm the flow or datasheet figures for your application before ordering.
| Model | GR30010LJF3TK AirTAC Low-Pressure Regulator NPT3/8 |
|---|---|
| Series | GR300 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, bar 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.
| GR300 | G-series pressure regulator, 300 body — sets the port range. |
|---|---|
| 10 | Port size PT3/8". This body offers 08 = PT1/4", 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. |
| 3 | Gauge scale: bar. 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 | GR300 · PT3/8" · 0.05 - 0.4 MPa (7 - 58 psi) |
|---|---|
| One size down | GR200 |
| One size up | GR400 |
| Line order | Filter first, then regulator, then lubricator |
On a machining cell where pneumatic clamps must grip workpieces at a controlled low holding pressure, this regulator holds the setpoint up to 0.4 MPa, and the check valve keeps the clamps from venting if the shop-air supply dips mid-cycle.
On a carton or tray conveyor where low-pressure air jets and hold-down pads need a gentle, repeatable setting, the 3/8 in port feeds the manifold and the bar-scale square gauge lets operators set and verify the line pressure at a glance.
On a lab or pilot-scale test bench driving small pneumatic actuators at reduced pressure, the low-pressure adjustment range gives finer control than a standard regulator, and the panel-mountable body suits instrument-panel installation.
Start with the size and port: the 300 size with a 3/8 in port sits mid-range in the GR line, and the right step up or down (200 to 600, 1/8 in to 1 in) depends on the air demand of the circuit - we can confirm sizing against the published flow curves. This unit is the low-pressure type, adjustable up to 0.4 MPa; if your process needs the full 0.05-0.9 MPa range of the standard GR, choose that variant instead. The fitted square gauge reads in bar; MPa and psi scales are available, and an external round gauge is optional. Thread is NPT here - PT is the standard catalogue thread and G (BSPP) is also an order option. The J code omits the optional bracket, and the K code adds a reverse/check valve. AirTAC publishes flow 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 there is no one number we can honestly quote. Send us your inlet pressure, set pressure and air demand and we will confirm the sizing from the datasheet curves on request before you order.
L marks the low-pressure type: the adjustment range tops out at 0.4 MPa instead of the standard GR range of 0.05-0.9 MPa. It suits circuits that run at reduced pressure and want finer setting there. Maximum inlet pressure is still 1.0 MPa (145 psi), and the operating temperature range is -20 to 70 C, wider than the rest of the G-series family.
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.