AirTAC GFR300-08 Filter Regulator (GFR30008MJC1W)
The AirTAC AirTAC GFR300-08 Filter Regulator (GFR30008MJC1W) is a genuine G-series filter regulator: water separation, 5 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 grade5 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 (GFR30008MJC1W)
The GFR30008MJC1W is an AirTAC GFR300-series filter regulator: filtration and pressure regulation combined in one body for compressed air only. This configuration is size 300 with a PT1/4 (Rc) port, a manual drain bowl in polycarbonate, a fine 5 um filter element for cleaner downstream air, and an external round pressure gauge scaled in MPa. Maximum working pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C (non-freezing).
This is a genuine AirTAC part from the G-series air-treatment range, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, drain types, filter grades and thread options (PT standard, G/BSPP and NPT available to order). Flow for this size is published as curves rather than a single rated figure, so contact us and we will confirm the datasheet and sizing figures on request.
AirTAC GFR300-08 Filter Regulator (GFR30008MJC1W) Technical Specifications
| Model | AirTAC GFR300-08 Filter Regulator (GFR30008MJC1W) |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (PT thread) |
| Filtering grade | 5 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 | 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 (GFR30008MJC1W)
| 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. |
| W | Filtering grade 5 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" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
Where the AirTAC GFR300-08 Filter Regulator (GFR30008MJC1W) Is Used
Pneumatic assembly presses
On a bench-mounted pneumatic press, the GFR30008MJC1W cleans the supply air to 5 um and holds the working pressure steady so cylinder stroking stays repeatable through the shift.
Paint and finishing lines
At the air drop feeding spray guns in a paint booth, the 5 um element and regulated pressure help deliver clean, stable air to the gun while the manual drain lets the operator bleed off water between batches.
Packaging machine valve islands
Feeding the solenoid valve stack on a cartoning or wrapping machine, this filter regulator protects sensitive valve internals from water and particulate and keeps the control pressure where the machine was set.
Is the AirTAC GFR300-08 Filter Regulator (GFR30008MJC1W) the Right Unit?
Size 300 with a 1/4 in port sits in the middle of the G-series line-up; if your circuit needs more flow, step up to size 400 with a 3/8 in or 1/2 in port. This unit has a manual drain: choose it where the bowl is easy to reach and someone can regularly bleed off collected water, and choose automatic or differential-pressure drain where access is difficult. The 5 um element (code W) suits finer filtration than the standard 40 um grade. The external round gauge reads in MPa; bar or psi scales and square embedded gauges exist in the range.
Thread is PT as the standard, with G (BSPP) and NPT versions available as catalogue options. No mounting bracket is included in this code (J); a bracket can be ordered. 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 (GFR30008MJC1W) FAQ
AirTAC publishes flow for this series as curves, not as a single rated number, so we do not quote one. Send us your application details and we will confirm the flow figures from the datasheet on request, including the pressure drop across the 5 um element at your working condition.
The M in the code means manual drain: someone opens the drain valve to remove collected condensate. It suits accessible mounting points with regular operator attention. If the bowl sits high, inside a cabinet or anywhere bleeding is inconvenient, order an automatic (A) or differential-pressure (blank) drain variant of the same GFR300 size instead.
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Standard models are processed and dispatched in 3-5 business days.
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Request a Quote for AirTAC GFR300-08 Filter Regulator (GFR30008MJC1W)
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.