AirTAC GFR300-08 Filter Regulator (GFR30008MJF3)
The AirTAC AirTAC GFR300-08 Filter Regulator (GFR30008MJF3) 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 (GFR30008MJF3)
The AirTAC GFR30008MJF3 is a combined filter regulator that removes water and particulate from compressed air and holds downstream pressure steady in one body. This version is size 300 with a PT1/4 port, a manual drain bowl, the standard 40 um filter element, and an embedded square pressure gauge scaled in bar - convenient where the plant reads pressure in bar rather than MPa. Manual drain allows the full 0.05-0.9 MPa (7-130 psi) adjustment range.
This is a genuine AirTAC part from the G series, available in sizes 200, 300, 400 and 600 with options for drain type, filter grade, gauge scale, bracket and G/NPT threads. Flow is published as curves rather than one rated figure, so ask us to confirm the datasheet values for your application on request.
AirTAC GFR300-08 Filter Regulator (GFR30008MJF3) Technical Specifications
| Model | AirTAC GFR300-08 Filter Regulator (GFR30008MJF3) |
|---|---|
| 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, bar 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 (GFR30008MJF3)
| 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. |
| 3 | Gauge scale: bar. 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 (GFR30008MJF3) Is Used
Machine tool air inlet conditioning
A filter regulator at the air inlet of a lathe or machining centre, set in bar to match the machine builder's stated supply pressure on the data plate.
Textile and converting machinery
Supplying regulated, filtered air to the many small cylinders and jets across a textile or converting line, with bar-scale readouts matching European machine gauges.
Truck and trailer service bays
Conditioning shop air feeding brake-system test benches and pneumatic service tools, where bar gauge readings align with vehicle air-system specifications.
Is the AirTAC GFR300-08 Filter Regulator (GFR30008MJF3) the Right Unit?
This code differs from the MPa-gauge version only in gauge scale (F3 = square gauge, bar) - pick it to match bar-graduated plant instrumentation. Size 300 with a 1/4 inch PT port suits typical machine supply lines; use size 400/600 where demand is heavier. The 40 um element is the standard filtration grade; the W variant gives 5 um. Manual drain suits regular maintenance rounds; automatic or differential-pressure drain versions remove that task but carry a 0.15-0.9 MPa (20-130 psi) range. No bracket included (J) - add one if panel mounting is planned. PT thread is standard; G and NPT are orderable options.
Because flow is given as curves, not a single rating, ask us to check the datasheet against your required flow before you order.
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 (GFR30008MJF3) FAQ
AirTAC publishes G-series flow as curves, so there is no single rated capacity figure to state. Give us your working pressure and flow requirement and we will confirm the datasheet curve for this 300-size, 1/4-inch filter regulator on request.
The 3 sets the gauge scale: the embedded square pressure gauge reads in bar (1 would be MPa). Everything else in the code is standard - PT1/4 port, manual drain, 40 um element, no bracket - with the usual 0.05-0.9 MPa (7-130 psi) adjustment range and 1.0 MPa (145 psi) maximum working pressure.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
Request a Quote for AirTAC GFR300-08 Filter Regulator (GFR30008MJF3)
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.