AirTAC GFR300-08 Filter Regulator (GFR30008MJF1)
The AirTAC AirTAC GFR300-08 Filter Regulator (GFR30008MJF1) 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 manual drain and regulates 0.05 - 0.9 MPa (7 - 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 range0.05 - 0.9 MPa (7 - 130 psi)
- Filtering grade40 µm
- DrainManual 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 (GFR30008MJF1)
The GFR30008MJF1 is an AirTAC GFR300-series filter regulator for compressed air, combining a filter bowl and a regulator in one body. This configuration is size 300 with a PT1/4 (Rc) port, a manual drain polycarbonate bowl, the standard 40 um filter element and a square embedded gauge scaled in MPa. Maximum working pressure is 1.0 MPa (145 psi), the manual-drain adjustment range is 0.05 to 0.9 MPa (7 to 130 psi), and the temperature range is -5 to 70 C (non-freezing).
This is a genuine AirTAC part from the G-series air-treatment range, which covers sizes 200 to 600 with ports from 1/8 in to 1 in, plus drain types, a 5 um filter option, gauge variants and G (BSPP) or NPT threads available to order. Flow for the series is published as curves rather than a single rated figure, so ask us to confirm datasheet and sizing figures on request.
AirTAC GFR300-08 Filter Regulator (GFR30008MJF1) Technical Specifications
| Model | AirTAC GFR300-08 Filter Regulator (GFR30008MJF1) |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (PT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 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 | Manual drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, MPa 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 0.05 - 0.9 MPa (7 - 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 (GFR30008MJF1)
| 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". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 130 psi)). |
| (blank) | Standard type. Blank is standard, L is the low-pressure type. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. C is round, F is square. |
| 1 | Gauge scale: MPa. 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 (GFR30008MJF1) Is Used
Assembly bench tool supply
At a multi-station assembly bench, this filter regulator conditions the 1/4 in feed for pneumatic screwdrivers and riveters, with the embedded MPa gauge letting line staff verify set pressure at a glance.
Truck and trailer service bays
In a commercial-vehicle workshop, the unit filters and regulates shop air for brake-testing fixtures and pneumatic jacks, while the manual drain allows a quick condensate purge between vehicles.
Textile machine air supplies
Feeding pneumatic thread tensioners and doffing cylinders on textile machinery, this filter regulator keeps a stable MPa-set supply and removes water and particles from the plant air line.
Is the AirTAC GFR300-08 Filter Regulator (GFR30008MJF1) the Right Unit?
Size 300 with a 1/4 in port is the middle step of the G-series; choose size 200 for smaller branch circuits or 400/600 for higher flow demand. The manual drain (M) is best where an operator can regularly bleed the bowl; select the automatic or differential-pressure drain code for hard-to-reach spots. This version carries the standard 40 um element for general-purpose filtration, with the 5 um (W) element available when finer cleaning is required. The square embedded gauge (F) reads in MPa and sits compactly on the body; an external round gauge with other scales is an alternative code.
Thread is PT as the standard, with G (BSPP) and NPT versions available as catalogue options, and no mounting bracket is included (J). Because flow is published as curves and not a single rating, ask us to confirm sizing against your application 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 0.05 - 0.9 MPa (7 - 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 (GFR30008MJF1) FAQ
We do not quote a single rated flow because AirTAC publishes flow for this series as curves rather than one figure. Send us your set pressure and air consumption and we will confirm the appropriate flow data from the datasheet on request so the 1/4 in port is correctly sized.
This code uses the square embedded gauge (F) scaled in MPa (1), which keeps a compact profile on the body. If you prefer the external round gauge (C), or scales in psi (2) or bar (3), the same GFR300-08 configuration is available under alternative codes in the range.
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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 (GFR30008MJF1)
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.