
The AirTAC Airtac B52-GR Copper-Free Air Source Treatment Unit B52-GR30008C1 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 GR30008C1 is a genuine AirTAC G-series air pressure regulator for compressed air only. It reduces and holds a steady downstream pressure across the standard adjustment range of 0.05-0.9 MPa (7-130 psi). The C suffix specifies an external round pressure gauge and the scale code 1 means the gauge reads in MPa. It decodes to size 300 with PT1/4 (1/4 inch PT) ports and, with no bracket code, a mounting bracket is included; the GR series is also panel-mountable. Maximum inlet pressure is 1.0 MPa (145 psi), the working temperature range is -20 to 70 C, and pressure loss through the regulator is low.
This is a genuine AirTAC part, not a copy or a substitute. The GR series is available in sizes 200, 300, 400 and 600 with ports from 1/8 inch to 1 inch and PT, G (BSPP) or NPT threads, with square embedded or external round gauges in MPa, psi or bar scales and an optional reverse valve. AirTAC publishes regulator flow as curves rather than a single rated figure, so we confirm flow and datasheet figures on request before you order.
| Model | Airtac B52-GR Copper-Free Air Source Treatment Unit B52-GR30008C1 |
|---|---|
| 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 | Fixing bracket included |
| Fluid | Compressed air |
|---|---|
| Max. working pressure | 1.0 MPa (145 psi) |
| Temperature range | -20 to +70 °C |
| Pressure gauge | Fitted — round, MPa 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. |
| (blank) | Fixing bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 1 | Gauge scale: MPa. 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 machine air feed on a CNC machining cell, with the round MPa gauge giving operators a clear visual check of the working pressure at the machine.
Supplies regulated air to pick-and-place and screwdriver stations along an electronics assembly line, where the external gauge supports quick line-side checks.
Feeds auxiliary pneumatic functions on an injection molding machine, such as core pulls and ejector assist, with a stable, visibly monitored setpoint.
GR300 is the next size step above the GR200: same 1/4 inch port code in this model, but the larger 300 body gives more capacity when your demand outgrows a size 200 unit. Note the port remains 1/4 inch here, so check your pipe size against both the body size and the port before ordering. The standard type adjusts from 0.05 to 0.9 MPa; the L low-pressure type covers up to 0.4 MPa if your setpoint sits below that. The C1 gauge choice gives you an external round gauge with an MPa scale; if your team reads in psi or bar, scale codes 2 and 3 are available, and an embedded square gauge is the alternative style. If upstream pressure dips could disturb your setting, the K version with a reverse valve is available.
Thread is PT as the standard; G (BSPP) and NPT are catalogue options. AirTAC publishes flow for the GR series as curves, not a single rated number, so ask us to confirm sizing against the 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 performance curves across inlet pressures and setpoints, not as a single rated figure, so we do not quote one number. Tell us your inlet pressure, setpoint and air demand, and we will confirm the flow figures from the datasheet on request so you can verify the size 300 unit is right.
C specifies an external round pressure gauge, and the scale code 1 means that gauge reads in MPa. If your team prefers psi or bar, scale codes 2 and 3 are available, and an embedded square gauge is the other style. Without a gauge code the regulator still adjusts from 0.05 to 0.9 MPa; you simply lose the visual reference.
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.