The AirTAC AirTAC GR30015LC3TK Air Regulator NPT1/2 Low-Pressure 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 AirTAC GR30015LC3TK is a pressure regulator for compressed air: it holds a steady downstream pressure regardless of swings in supply pressure or air demand. This is the low-pressure type, so the setting range tops out at 0.4 MPa, and it is built for a 1/2 in NPT port. The code also confirms a round external gauge reading in bar, a reverse (check) valve fitted, and a mounting bracket included; GR bodies are also panel-mountable. There is no filter element, no bowl and no drain on this family - it regulates pressure only.
This is a genuine AirTAC part from the GR series, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in and standard or low-pressure variants. 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. Flow is published as curves rather than a single rated figure, so ask us and we will confirm the datasheet figures for your application.
| Model | AirTAC GR30015LC3TK Air Regulator NPT1/2 Low-Pressure |
|---|---|
| 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 | Fixing bracket included |
| Fluid | Compressed air |
|---|---|
| Max. working pressure | 1.0 MPa (145 psi) |
| Temperature range | -20 to +70 °C |
| Pressure gauge | Fitted — round, 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. |
|---|---|
| 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. |
| (blank) | Fixing bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. 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 · 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 |
Low-pressure clamping circuits on machining fixtures need a steady downstream pressure that never creeps above a safe setting - this low-pressure regulator holds the clamp force constant through the cycle while the check valve holds the set pressure if supply dips.
On cartoning and wrapping lines, low-pressure cylinders and actuators run all day at modest settings; a 1/2 in regulator at the machine inlet keeps their speed and force repeatable despite pressure swings from a shared plant air ring.
Textile, printing and bottling lines use low-pressure air jets for cleaning and drying; this regulator lets operators set and hold the exact blowing pressure at the station, with the bar gauge giving a clear local reading.
Start with the port and size: this unit steps up to 1/2 in NPT in the 300 size, and the size you choose should follow the air demand of the circuit - flow is published as curves, not a single rating, so ask us to confirm sizing against your application before ordering. Because this is the low-pressure (L) type, it suits circuits that must never be set above 0.4 MPa; standard GR units cover 0.05-0.9 MPa if you need more headroom. The C3 code gives you an external round gauge scaled in bar; an embedded square gauge (MPa, psi or bar) is also available. Thread is NPT here, with PT (standard) and G (BSPP) as orderable options. The K code means a reverse/check valve is fitted, and the bracket is included. GR is also panel-mountable if you prefer that to bracket fixing.
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 GR flow as curves rather than a single rated figure, so we do not quote a rated flow number. Tell us your application and air demand and we will confirm the datasheet flow curve for this 1/2 in, 300-size unit before you order.
L marks the low-pressure type: the setting range tops out at 0.4 MPa instead of the standard GR range of 0.05-0.9 MPa. Choose it where the circuit must never be set above 0.4 MPa; maximum inlet pressure is still 1.0 MPa (145 psi) and the temperature range is -20 to 70 C.
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.