
The AirTAC B52-GR Copper-Free Air Source Treatment Unit B52-GR30008JC3 is a genuine G-series air pressure regulator. It holds a stable downstream pressure over the range 0.05 - 0.9 MPa (7 - 130 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 stable downstream pressure from a compressed air line, with no filter, no drain bowl and no lubrication function. This GR30008JC3 is the 300 size with a 1/4 in PT port (PT is the standard thread; G and NPT are catalogue options), the standard pressure type with a 0.05-0.9 MPa (7-130 psi) adjustment range, and an external round gauge reading in bar. The J code means no mounting bracket is supplied. Maximum inlet pressure is 1.0 MPa (145 psi), the working temperature range is -20 to 70 C (non-freezing), and the medium is compressed air only.
This is a genuine AirTAC part distributed for the US market. The G-series regulator family is offered in sizes 200, 300, 400 and 600 across a range of port sizes, with a low-pressure type option (up to 0.4 MPa), optional check valve, embedded square or external round gauges in MPa, psi or bar scale, G (BSPP) or NPT thread variants, and bracket or panel mounting. Flow capacity is published as curves rather than a single figure, so we confirm the datasheet and flow curve for your exact model on request.
| Model | Airtac B52-GR Copper-Free Air Source Treatment Unit B52-GR30008JC3 |
|---|---|
| Series | GR300 pressure regulator |
| Port size | PT1/4" (PT thread) |
| Regulating range | 0.05 - 0.9 MPa (7 - 130 psi) |
| Pressure type | Standard 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, bar 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". |
| (blank) | Standard type — 0.05 - 0.9 MPa (7 - 130 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. |
| 3 | Gauge scale: bar. 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 - 0.9 MPa (7 - 130 psi) |
|---|---|
| One size down | GR200 |
| One size up | GR400 |
| Line order | Filter first, then regulator, then lubricator |
Regulates the supply to gate and reject cylinders on a packaging conveyor, with the bar gauge matching the pressure figures on European-sourced machine documentation.
Sets the operating pressure for actuators on textile and light-assembly machinery, giving line staff a local bar-scale readout at each 1/4 in drop.
Installed at workshop drops feeding impact drivers and riveters, letting operators set and read tool supply pressure in bar at the point of use.
Match the 200/300/400/600 size to your port and flow demand - larger sizes carry larger ports and more flow. This configuration uses the no-bracket J option with an external round gauge in bar scale, a natural fit for equipment documented in bar; MPa and psi scales and a no-gauge version exist in the family. Choose PT (standard), G (BSPP) or NPT thread, and add the K check valve if the downstream circuit must hold pressure against supply loss. Because flow is published as curves and not a single rating, send us your application parameters and we will confirm sizing against the datasheet before you order.
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.
There is no single rated flow figure - AirTAC publishes regulator capacity only as flow curves. Give us your inlet pressure and the flow your application needs, and we will confirm the correct size for this model from the datasheet curve on request.
The 3 sets the external round gauge scale to bar. The same family is available with 1 for MPa and 2 for psi, plus N for no gauge at all, so you can order the scale that matches the rest of your machine's instrumentation.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models are processed and dispatched in 3-5 business 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.