The AirTAC GR30015LJNTK AirTAC Low-Pressure Regulator NPT1/2 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 PT1/2" 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 GR30015LJNTK is an AirTAC GR300 air pressure regulator in the low-pressure type, adjusted to regulate downstream pressure up to 0.4 MPa. It is a regulation-only unit: there is no filter, no bowl and no drain, so nothing in this device removes water or adds lubricant. This configuration carries a 1/2 in NPT thread, a built-in reverse (check) valve, no pressure gauge fitted and no mounting bracket, and it is also suitable for panel mounting.
This is a genuine AirTAC part from the GR series, which spans sizes 200, 300, 400 and 600 with port options from 1/8 in to 1 in and PT, G or NPT threads. Maximum working (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. Flow is published as curves rather than a single rated figure, so we confirm the datasheet and sizing figures on request.
| Model | GR30015LJNTK AirTAC Low-Pressure Regulator NPT1/2 |
|---|---|
| Series | GR300 pressure regulator |
| Port size | PT1/2" (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 | 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. |
|---|---|
| 15 | Port size PT1/2". 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. |
| 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 · PT1/2" · 0.05 - 0.4 MPa (7 - 58 psi) |
|---|---|
| One size down | GR200 |
| One size up | GR400 |
| Line order | Filter first, then regulator, then lubricator |
Holds a gentle, stable downstream pressure for clamp or hold-down cylinders that must not crush delicate cartons or trays, with the check valve helping to hold the setting if supply pressure dips.
Sets the reduced pressure feeding air knives or blow-off nozzles that clear dust and droplets from containers, where a low-pressure regulator keeps the jet effective without over-pressurising the circuit.
Regulates the compressed air driving pneumatic actuators and sample-transfer cylinders on a bench or skid, where only low regulated pressure is required and a 1/2 in NPT connection suits the supply line.
Size and port are the first choice: step up through GR200, GR300, GR400 or GR600 and the matching port (here 1/2 in NPT) as the air demand of the circuit grows. The L code makes this the low-pressure type, suited to circuits that must be held at reduced pressure up to 0.4 MPa rather than the standard range. The K code adds a reverse (check) valve, useful where upstream supply may drop and the downstream setting should be held. Note the decode choices: N means no gauge is fitted (a gauge can be specified in the code), J means no bracket is included, and T selects NPT thread - PT is the standard thread, with G and NPT as catalogue options to order. Because flow is published as curves and not a single rating, 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.
Flow for the GR300 is published by AirTAC as curves, not as a single rated figure, so we do not quote a rated flow, Cv or SCFM number. Tell us your application and line conditions and we will confirm the relevant flow and sizing figures from the datasheet on request.
The L code in GR30015LJNTK makes it the low-pressure type, regulating up to 0.4 MPa for circuits that must not see full line pressure. The N code means no pressure gauge is fitted, J means no mounting bracket is included, and T selects a 1/2 in NPT thread - PT is the standard thread, with G and NPT available as catalogue options to order.
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.