The AirTAC GR30015LC2K AirTAC Low-Pressure Regulator, PT1/2 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 GR30015LC2K is an AirTAC GR-series air pressure regulator: it does one job, holding a stable downstream pressure from a compressed-air supply, and it contains no filter, no bowl and no lubricator. This size 300 unit is built with 1/2 inch PT ports and is the low-pressure (L) type, so its adjustment range tops out at 0.4 MPa - the right choice for circuits that must never see full line pressure. It is supplied with an external round pressure gauge scaled in psi, a built-in reverse (check) valve that lets downstream air hold when the upstream supply drops, and a mounting bracket; the GR body is also panel-mountable.
This is a genuine AirTAC part. The GR line spans sizes 200 to 600 with port sizes from 1/8 to 1 inch, standard or low-pressure regulation, gauges in MPa, psi or bar scales, an optional check valve, and PT, G (BSPP) or NPT threads to order. Max 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 figures are published as curves rather than a single rating, so ask us and we will confirm the datasheet numbers for your application.
| Model | GR30015LC2K AirTAC Low-Pressure Regulator, PT1/2 |
|---|---|
| Series | GR300 pressure regulator |
| Port size | PT1/2" (PT 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, psi 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. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | PT 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 |
On a carton-sealing or wrapping machine section that runs at a deliberately low setpoint, this low-pressure GR regulator caps the adjustable range at 0.4 MPa so operators cannot accidentally wind the setting up to full line pressure, while the psi-scaled round gauge lets maintenance read the setting in familiar units.
In a workholding fixture where clamps must stay pressed if the shop air dips, the fitted reverse (check) valve keeps downstream pressure on the clamp side when upstream supply drops, and the regulator holds the chosen clamp pressure steady across the shift.
On a process skid where diaphragm actuators or low-pressure air cylinders are fed from a main 1/2 inch header, this size 300 regulator drops the branch to a controlled low setting, with the bracket or panel mounting letting it sit neatly beside the other air-prep components.
Start with the port step: size 300 with 1/2 inch PT ports suits lines plumbed at 1/2 inch; if your pipe run or expected demand is smaller or larger, step to size 200 or 400 instead - flow is published as curves, not a single rating, so send us your demand and we will confirm the right size before you order. Next, decide the regulation class: this low-pressure (L) version adjusts up to 0.4 MPa, while the standard GR type covers up to 0.9 MPa - pick L only if your process genuinely needs a low setpoint ceiling. Then choose the gauge: this unit carries a round external gauge in psi; square embedded gauges and MPa or bar scales are the other catalogue options. Thread is PT as standard, with G (BSPP) and NPT available to order. The K code means a reverse/check valve is fitted - useful where you want downstream pressure retained on supply loss; omit K if you do not. A mounting bracket is included, and GR can also be panel-mounted.
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, not as a single rated figure, so we do not quote a number here. Tell us your line pressure, setpoint and air demand and we will confirm the flow from the datasheet curves for your application before you order.
The L in the code marks the low-pressure type: its adjustment range goes up to 0.4 MPa instead of the standard GR range, which suits circuits that must stay below full line pressure. The K code means a reverse (check) valve is fitted, so downstream pressure is retained if the upstream supply is lost. Max inlet pressure is still 1.0 MPa (145 psi), and the unit works from -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.