The AirTAC GR300-08LC2 AirTAC Low-Pressure Regulator 1/4 in PT 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 PT1/4" 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 GR series is a pure air pressure regulator: it reduces and holds a steady downstream pressure from your compressed air supply, with no filtration, no bowl and no lubrication. This GR300-08LC2 is the 300 size with a 1/4 inch PT port in the L low-pressure type, whose setting range tops out at 0.4 MPa for circuits that must stay at low pressure. An external round pressure gauge with a psi scale is fitted so the setting can be read directly, and the mounting bracket is included.
This is a genuine AirTAC part. The G series regulators come in 200, 300, 400 and 600 sizes with ports from 1/8 to 1 inch, PT as standard thread with G and NPT options to order, a check-valve variant, and an operating temperature of -20 to 70 C. AirTAC publishes regulator flow as curves rather than a single rating, so we confirm the flow and datasheet figures for your application on request.
| Model | GR300-08LC2 AirTAC Low-Pressure Regulator 1/4 in PT |
|---|---|
| Series | GR300 pressure regulator |
| Port size | PT1/4" (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 | 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. |
|---|---|
| 08 | Port size PT1/4". 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. |
| (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 · PT1/4" · 0.05 - 0.4 MPa (7 - 58 psi) |
|---|---|
| One size down | GR200 |
| One size up | GR400 |
| Line order | Filter first, then regulator, then lubricator |
Holds the low, stable pressure a spray gun needs, with the local psi gauge letting operators verify the setting at the line.
Regulates branch pressure for light clamping jigs that run at low settings, read directly in psi by the assembly team.
Drops shop-air pressure to the modest level pneumatic dock and trailer accessories require, regulated at the point of use.
Pick this low-pressure L type when your set point sits below the standard range - it is limited to 0.4 MPa by design. The 300 body takes a 1/4 inch PT port; step to 200, 400 or 600 for other pipework. The round gauge here reads in psi, which suits US practice; order the LC1 code for an MPa scale, or add the K suffix if a check valve is needed. G or NPT threads are catalogue options. Flow is published as curves, not a single rating, so 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 characteristic curves, not as a single rated figure, so we do not state a number here. Send us your application and we will confirm the flow from the datasheet on request before you order.
The C2 code gives an external round gauge with a psi scale. If your team prefers metric readings, order the otherwise identical LC1 code, which carries an MPa scale.
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.