AirTAC GFR300-08 Filter Regulator (GFR30008MJC1K)
The AirTAC AirTAC GFR300-08 Filter Regulator (GFR30008MJC1K) 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 (GFR30008MJC1K)
The GFR300-08MJC1K is an AirTAC G-series filter regulator with a reverse/check valve fitted. It filters water and particulate and regulates pressure in one 300-size body, with a PT1/4 port, manual drain bowl, standard 40 um element and an external round gauge on MPa scale; the J code means no mounting bracket is included. Manual drain puts the regulator adjustment at 0.05-0.9 MPa (7-130 psi), and the check valve holds the downstream circuit against upstream pressure loss.
This is a genuine AirTAC part. The GFR series offers sizes 200 to 600, G or NPT thread options, automatic or differential-pressure drains, a 5 um element grade, gauge scale choices and bracket variants. Flow is published as curves rather than a single rating, so we confirm datasheet and flow figures on request.
AirTAC GFR300-08 Filter Regulator (GFR30008MJC1K) Technical Specifications
| Model | AirTAC GFR300-08 Filter Regulator (GFR30008MJC1K) |
|---|---|
| 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 — round, MPa scale |
| Reflux valve | Fitted (reverse flow permitted) |
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 (GFR30008MJC1K)
| 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). |
| C | Gauge shape: Round. 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. |
| K | Reverse-flow (reflux) valve fitted. |
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 (GFR30008MJC1K) Is Used
Air clamp holding circuit
On a machining fixture with pneumatic clamps, the check valve keeps the clamps engaged if shop air pressure falls, while the regulator holds the set clamping force.
Sorting gate actuator feed
Supplying diverter gates on a parcel sorting conveyor, it delivers clean regulated air and backs the downstream side with the check valve against momentary supply dips.
Pneumatic press safety feed
On a small bench pneumatic press, it filters and regulates the ram circuit supply, with the MPa gauge letting setters verify working pressure at a glance.
Is the AirTAC GFR300-08 Filter Regulator (GFR30008MJC1K) the Right Unit?
Choose this K version when your circuit must keep downstream pressure if the supply drops, for example on clamping or holding functions; without the K code the same unit ships with no check valve. Manual drain suits attended lines, while automatic or differential-pressure drain covers unattended positions, and the 40 um element is the standard protection grade.
The 300 size at 1/4 in PT fits typical machine supply drops; larger sizes carry more flow. Because flow is published only as curves, ask us to confirm sizing against your application from the datasheet 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. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC GFR300-08 Filter Regulator (GFR30008MJC1K) FAQ
AirTAC states flow for this series as curves, not as one rated figure, so we do not quote a single number. Share your pressure and consumption requirements and we will confirm the sizing from the datasheet on request.
K means a reverse/check valve is fitted in the unit, so downstream pressure is held if upstream supply fails. The otherwise equivalent GFR300-08MJC1 without K has no check function, which is the key choice between the two codes.
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Covers non-human-caused product damage.
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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 (GFR30008MJC1K)
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.