The AirTAC GR30015LJC1TK 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, 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 GR30015LJC1TK is an AirTAC GR-series air pressure regulator: it does one job, holding a stable downstream air pressure from a compressed-air supply, and it contains no filter, no drain bowl and no lubricator. This unit is the 300 size with 1/2 in NPT ports, built as the low-pressure type, so its regulated output is set within a range up to 0.4 MPa - suited to circuits that must never see full line pressure. It is fitted with an external round pressure gauge scaled in MPa for direct reading of the set pressure, and a reverse (check) valve that keeps the downstream setting when upstream supply is lost. Maximum 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. Mounting bracket is not included; the GR body is also panel-mountable.
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, standard and low-pressure types, gauge and no-gauge variants, and PT, G and NPT thread options. Flow is published in the catalogue as curves rather than a single rated figure, so ask us to confirm the flow and datasheet details for your application before ordering.
| Model | GR30015LJC1TK 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 | Fitted — round, MPa 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. |
|---|---|
| 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. |
| 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 |
Set a gentle, stable supply pressure to spray guns and air-assisted atomising lines in a finishing booth, where the process calls for low regulated pressure well below full compressor line pressure.
Feed delicate clamp and hold-down cylinders on a packaging or labelling machine at a reduced, repeatable pressure, with the round MPa gauge letting operators verify the set point at a glance.
Provide regulated pilot air to pneumatically actuated process valves on a plant line, with the check valve holding the pilot setting if the upstream supply dips or is shut off.
Size and port: the 300 size with 1/2 in NPT ports sits in the middle of the GR range; step up to 400 or 600, or down to 200, according to the pipe size and air demand of the circuit - we will confirm sizing against the published flow curves on request. This unit is the low-pressure type (code L), whose setting range tops out at 0.4 MPa; choose the standard GR type instead if you need settings up to 0.9 MPa. The round gauge fitted here reads in MPa; square-gauge, no-gauge and psi/bar scale variants exist in the family. Thread: PT is the catalogue standard and G (BSPP) and NPT are order options - this code specifies NPT. A reverse/check valve (code K) is fitted, and no mounting bracket is included (code J); GR units are also panel-mountable.
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 in the catalogue, not as a single rated number, so we do not quote a figure here. Tell us your line size, inlet pressure and required downstream flow and we will confirm the sizing against the datasheet curves on request.
The L in the code marks the low-pressure type of the GR family: its adjustment range tops out at 0.4 MPa, which suits circuits that must be kept well below full line pressure. If you need settings up to 0.9 MPa, order the standard GR type instead. Maximum inlet pressure is still 1.0 MPa (145 psi).
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.