The AirTAC AirTAC GR30015LJC1T Regulator NPT1/2 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 PT1/2" 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 GR30015LJC1T is an AirTAC GR-series air pressure regulator: it does one job, holding downstream pressure steady on a compressed-air line. This unit is the low-pressure type, so its adjustment range tops out at 0.4 MPa, and it is built in size 300 with a 1/2 in NPT port. An external round pressure gauge with an MPa scale is fitted so you can read and dial in the setpoint, and the unit is supplied without a mounting bracket - it can also be panel-mounted.
This is a genuine AirTAC part. The GR family spans sizes 200 to 600 with ports from 1/8 in to 1 in, in standard or low-pressure versions, with your choice of gauge scale (MPa, psi or bar), G/NPT thread options, and bracket or no-bracket mounting. Flow is published as curves rather than a single rated figure, so ask us to confirm sizing figures from the datasheet for your application.
| Model | AirTAC GR30015LJC1T Regulator NPT1/2 Low-Pressure Type |
|---|---|
| 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 | Fitted — round, MPa scale |
| 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. |
|---|---|
| 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. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 1 | Gauge scale: MPa. 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 · 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 |
On a fixture-clamping manifold that must not see more than a moderate setpoint, the low-pressure GR30015LJC1T holds the downstream pressure at its adjusted value so clamps act consistently without over-pressurising the circuit.
A paint or coating booth air line that needs a gentle, stable supply pressure can take its setpoint from this regulator, with the fitted round MPa gauge letting an operator check and adjust the setting at the wall.
On a machine with several air branches, one GR30015LJC1T in a 1/2 in branch holds that branch at its own low setpoint independently of the main header, with panel mounting available to build it into the control cabinet or manifold plate.
Start with the port step: size 300 carries a 1/2 in port, and larger sizes move to 3/4 in and 1 in for higher flow paths - match the step to your line, then let us confirm the flow curve against your demand. Choose the regulator type by setpoint: this code is the low-pressure (L) version, adjusting up to 0.4 MPa; the standard version covers up to 0.9 MPa. Pick the gauge scale you want (MPa, psi or bar) and the thread family - PT is the catalogue standard, with G and NPT as orderable options. Decide on bracket versus no bracket or panel mounting. Because flow is published as curves and not a single rating, 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 curves rather than a single rated figure, so we do not quote a rated flow, Cv or SCFM number for this unit. Tell us your line size and demand and we will confirm the flow figures from the datasheet for your application on request.
The L in the model code marks the low-pressure type, whose adjustment range tops out at 0.4 MPa. If you need to regulate above that, the standard GR version adjusts up to 0.9 MPa - the type is a decodable ordering choice, not an accessory. Maximum inlet pressure remains 1.0 MPa (145 psi), and the fitted round gauge reads in MPa so you can set and verify the point.
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.