The AirTAC GR30010LJNT AirTAC Air Regulator, Low-Pressure, 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, ordered without a 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 GR30010LJNT is an AirTAC GR-series air pressure regulator: it does one job, holding a steady downstream pressure from a compressed-air supply. This is the low-pressure type, adjustable up to 0.4 MPa, in size 300 with a 3/8 in NPT port. The code J means no mounting bracket is fitted, and N means no pressure gauge is supplied, so you read the setting on your own downstream gauge or add one separately. As a GR unit it contains no filter, no bowl and no drain, and it never lubricates the air.
This is a genuine AirTAC part. The GR line spans sizes 200 to 600, so the same regulator family covers larger ports and higher flow steps if your circuit grows. Gauge options, bracket options and G (BSPP) or NPT thread variants are available to order. Flow is published as curves rather than a single rated figure, so we confirm the datasheet figures for your application on request.
| Model | GR30010LJNT AirTAC Air Regulator, Low-Pressure, 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 | Not fitted |
| 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.
| 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. |
| N | No pressure gauge (N). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 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 | 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 |
Pneumatic clamps and hold-downs on a carton or tray packaging line often need a gentle, stable setting well below normal line pressure. This low-pressure regulator caps the adjustable range at 0.4 MPa, protecting delicate product handling while the 3/8 in port feeds the clamp manifold.
Blow-off and drying nozzles over a conveyor usually run best at a modest, repeatable pressure rather than full line pressure. The GR30010LJNT lets an operator set and hold that lower setting, and its wide -20 to 70 C operating window suits washdown-adjacent areas that see temperature swings.
Spray booths and coating heads depend on a steady atomizing-air setting to keep finish consistent. This regulator supplies a dedicated low-pressure branch from the shop air main, holding the set point for the spray station without any filtration or lubrication hardware in the way.
Size the GR by port and flow step: this unit is size 300 with a 3/8 in NPT port; step up to size 400 or 600 if your line needs a larger port. Choose the standard type for settings up to 0.9 MPa, or this low-pressure (L) type when the circuit must never be set above 0.4 MPa. The bare J code omits the bracket, and the N code omits the gauge; a gauge with your preferred scale (MPa, psi or bar) can be ordered instead. Thread: PT is the AirTAC standard, while G (BSPP) and NPT are catalogue options - this code is the NPT variant. One honest note: flow is published as curves, not a single rating, so ask us to confirm sizing against your application before ordering.
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, not as a single rated figure, so we do not quote a rated flow, Cv, l/min or SCFM number. Tell us your line size, inlet pressure and set pressure, and we will confirm the sizing against the datasheet curves on request before you order.
The L in the code means this is the low-pressure regulator type: its adjustment range tops out at 0.4 MPa instead of the standard 0.9 MPa, which suits circuits that must never be set high. This code (J, N) ships without a bracket and without a gauge; a gauge with MPa, psi or bar scale and the bracket are catalogue options you can order. PT is the standard thread, with G (BSPP) and NPT available as options.
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.