AirTAC GFR300-08 Filter Regulator (GFR30008AC4)
The AirTAC AirTAC GFR300-08 Filter Regulator (GFR30008AC4) is a genuine G-series filter regulator: water separation, 40 µm particulate filtration and balanced-type pressure regulation combined in a single body. It has PT1/4" ports, a automatic drain and regulates 0.15 - 0.9 MPa (20 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
- TypeFilter regulator
- Port sizePT1/4"
- Regulating range0.15 - 0.9 MPa (20 - 130 psi)
- Filtering grade40 µm
- DrainAutomatic drain
- Bowl materialPC
- Pressure gaugeFitted
- ThreadPT
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the AirTAC GFR300-08 Filter Regulator (GFR30008AC4)
GFR30008AC4 is an AirTAC G-series filter regulator combining filtration and pressure regulation in one body. This 300-size configuration has a 1/4 in PT port, the standard 40 um element, an automatic drain on the polycarbonate bowl, and the round external pressure gauge. With the automatic drain, regulation range is 0.15-0.9 MPa (20-130 psi) within a 1.0 MPa (145 psi) maximum inlet, operating from -5 to 70 C, bracket included.
This is a genuine AirTAC part. The GFR series spans sizes 200 to 600 with ports from 1/8 to 1 in, and offers drain type, filter grade, gauge scale and G/NPT thread options. Flow figures are published as curves rather than a single rating - we will confirm the datasheet values on request.
AirTAC GFR300-08 Filter Regulator (GFR30008AC4) Technical Specifications
| Model | AirTAC GFR300-08 Filter Regulator (GFR30008AC4) |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (PT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Standard type |
| Adjusting mechanism | Balanced type |
| Fluid | Compressed air |
|---|---|
| Max. working pressure | 1.0 MPa (145 psi) |
| Temperature range | -5 to +70 °C (unfreeze) |
| Drain type | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Fitted — round, Factory standard scale |
| Reflux valve | Not fitted |
Specifications follow the official AirTAC G-series air-preparation data. The regulating band is set by the drain type: automatic and differential-pressure drains regulate 0.15 - 0.9 MPa, a manual drain regulates 0.05 - 0.9 MPa. Standard type, regulating 0.15 - 0.9 MPa (20 - 130 psi). Air must not freeze in the unit. Flow curves, weight and outline dimensions are not published in our data set — ask us and we will confirm from the factory datasheet.
Model Code: AirTAC GFR300-08 Filter Regulator (GFR30008AC4)
| GFR300 | G-series filter regulator, 300 body — sets the port range. |
|---|---|
| 08 | Port size PT1/4". This body offers 08 = PT1/4", 10 = PT3/8", 15 = PT1/2". |
| A | Drain: Automatic drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 130 psi)). |
| (blank) | Standard type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| (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, drain, type, bracket, gauge, shape, scale, grade, thread, reflux — a blank position takes the default. Example: GFR300-08 is a 300 body, PT1/4", differential drain, standard type, bracket included, gauge fitted, 40 µm, PT thread, no reflux valve.
Size Class
- GFR200PT1/8" - PT1/4"
- GFR300PT1/4" - PT1/2"
- GFR400PT3/8" - PT1/2"
- GFR600PT3/4" - PT1"
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. The GFR600 uses an aluminium-alloy bowl; the 200, 300 and 400 bodies use PC.
| This model | GFR300 · PT1/4" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
Where the AirTAC GFR300-08 Filter Regulator (GFR30008AC4) Is Used
Workshop fixture clamping
A regulated 1/4 in feed to the clamp cylinders on a machining fixture, with the round external gauge read at the point of use when settings are checked.
Blow-off station upstream supply
Conditioning the branch that feeds air-knife nozzles on a parts-drying station, keeping water and debris out of the nozzles and holding a steady set pressure.
Maintenance bench drop
A filtered, regulated outlet on a maintenance-shop service bench where the automatic drain keeps the bowl clear between intermittent uses.
Is the AirTAC GFR300-08 Filter Regulator (GFR30008AC4) the Right Unit?
The 300 body with its 1/4 in PT port sits between the 200 and 400 steps; size up only where demand genuinely exceeds it. This code takes the automatic drain for unattended condensate purging (manual drain would widen the regulation range to 0.05-0.9 MPa / 7-130 psi; differential-pressure is the default). The 40 um element is the standard grade. The C code fits the round external gauge; the validated scale options on this family are 1 (MPa), 2 (psi) and 3 (bar), so we confirm the marking of the scale-4 code with AirTAC on request. Flow is published as curves, not a single rating - confirm sizing with us before ordering.
Quick checklist
- ✓ Body size for your peak flow (PT1/4" here)
- ✓ Element 40 µm or 5 µm
- ✓ Drain sets the regulating band
- ✓ Gauge fitted, shape and scale
- ✓ Thread PT, G (BSPP) or NPT
- ✓ Oil needed downstream? Use GFC instead
Installation & Maintenance Notes
- check Mount vertically, bowl down, following the airflow arrow.
- check One body does the filtering and the regulating — no separate regulator needed.
- check Keep inlet pressure at or below 1.0 MPa (145 psi).
- check Adjust only within 0.15 - 0.9 MPa (20 - 130 psi).
- check Drain condensate before the bowl fills.
- check Keep the unit above freezing (-5 to +70 °C, unfreeze).
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. Without the K option, air cannot flow back through the unit. A filter regulator adds no oil to the line.
AirTAC GFR300-08 Filter Regulator (GFR30008AC4) FAQ
We do not quote a single rated figure because AirTAC publishes this family's flow as characteristic curves, not one number. Send us your inlet pressure, set pressure and expected demand, and we will confirm the datasheet curve and sizing on request.
The C in the code fits the round external pressure gauge, and the validated scale options on this family are 1 (MPa), 2 (psi) and 3 (bar). Code 4 is not one of those markings, so we confirm the exact scale fitted with AirTAC on request before you order.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for AirTAC GFR300-08 Filter Regulator (GFR30008AC4)
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.