The AirTAC GR30015-G AirTAC Low-Pressure Air Regulator, G1/2 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 GR30015-G is an AirTAC GR-series air pressure regulator: its only job is to hold a steady, reduced downstream pressure from your compressed-air supply. This is the low-pressure (L) type, whose adjustment range goes up to 0.4 MPa, in the 300 size with 1/2 in G (BSPP) ports. It comes with an embedded square gauge reading in psi, a reverse/check valve fitted to hold downstream pressure when the supply drops, and a mounting bracket included; the body is also panel-mountable.
This is a genuine AirTAC part. The GR family spans sizes 200 to 600 with port sizes from 1/8 in to 1 in, in PT (standard), G and NPT threads, with round or square gauges in MPa, psi or bar scales, an optional check valve, and standard or low-pressure regulation. Flow is published as curves rather than a single rated figure, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GR30015-G AirTAC Low-Pressure Air Regulator, G1/2 |
|---|---|
| Series | GR300 pressure regulator |
| Port size | PT1/2" (G (BSPP) 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 — square, 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). |
| F | Gauge shape: Square. C is round, F is square. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| G | G (BSPP) 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 case-packing line, soft clamp and hold-down cylinders often need a gentle, stable pressure well below normal line pressure. This low-pressure GR regulator set at or below 0.4 MPa keeps those actuators from crushing product, and the check valve holds the clamp if the air supply dips.
Pneumatically actuated process valves and their positioners typically need a clean, steady pilot pressure lower than the plant main. Feeding the pilot circuit through this G1/2 low-pressure regulator, with its psi gauge visible on the panel, gives operators a set-and-read reference point at the manifold.
Fabric guides, lay-on rollers and web-tension arms on converting equipment work best with light, consistent air pressure. This regulator lets the line engineer dial in a low setpoint and read it directly in psi, while the included bracket makes it easy to mount beside the machine's valve stack.
Start with the port step: this 300-size unit carries 1/2 in ports, and the right size for you depends on the flow your line needs - larger sizes carry larger ports and more flow, and we can confirm the sizing against the published flow curves before you order. Choose the low-pressure (L) type only where your setpoint stays at or below 0.4 MPa; for higher setpoints use the standard GR type, which adjusts from 0.05 to 0.9 MPa. Pick your gauge scale (MPa, psi or bar) and round or square style; this unit ships with the embedded square gauge in psi. Thread is a real choice: PT is the standard, while G (BSPP) and NPT are catalogue options you order explicitly - this unit is the G version. The fitted K option adds a reverse/check valve, useful where downstream pressure must be held if the supply fails. A mounting bracket is included, and GR is 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 GR-series flow as curves, not as a single rated number, so we do not quote a l/min, m3/h or SCFM figure. Tell us your line pressure, setpoint and expected air demand, and we will confirm the flow figures from the datasheet for this 300-size, 1/2 in port unit on request before you order.
The L code means this regulator's adjustment range goes up to 0.4 MPa instead of the standard GR range - the right choice when your setpoint is genuinely low and you want finer control there. The K code means a reverse/check valve is fitted, so downstream pressure is held if the upstream supply is lost. Both are decodable straight from the model code GR30015LF2GK.
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.