The AirTAC GFR300-08 AirTAC Filter Regulator G1/4, 5 um, Manual Drain 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.
The AirTAC GFR30008MC2WGK is a filter regulator: it removes water and particulate from compressed air and holds downstream pressure steady in a single body. This unit is the 300 size with a G1/4 (BSPP) port, a 5 um filter element for finer filtration than the standard 40 um grade, a manual drain on the polycarbonate bowl, a round pressure gauge reading in psi, and a built-in check valve that lets downstream air pass while blocking reverse flow. Maximum inlet pressure is 1.0 MPa (145 psi), the regulator adjusts from 0.05 to 0.9 MPa (7-130 psi), and the working temperature range is -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR family is offered in 200, 300, 400 and 600 sizes with ports from 1/8 to 1 inch, PT as the standard thread and G or NPT as order options, with a choice of drain type, filter grade, gauge scale and check valve. Flow is published as curves rather than a single rating, so ask us to confirm the figures for your application on request.
| Model | GFR300-08 AirTAC Filter Regulator G1/4, 5 um, Manual Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (G (BSPP) 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, psi 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.
| 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. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| G | G (BSPP) 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.
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) |
Feeding tool-clamp and coolant-spray actuators on a CNC machining centre, where the 5 um element protects fine pilot valves and the regulator holds a steady clamp pressure.
Regulating air to pick-and-place cylinders on a packaging conveyor line; the check valve holds downstream pressure through upstream dips and the manual drain is emptied at shift start.
Conditioning supply air for weld-gun clamps in a robotic welding cell, where the 5 um grade guards solenoid valves and the psi gauge gives operators a local setpoint readout.
Within the GFR range you can step across the 200/300/400/600 sizes and ports from 1/8 to 1 inch, so match the port to your line size and let us confirm the flow curve against your demand before ordering. This configuration is fixed: 5 um filtration instead of the standard 40 um, a manual drain (simple and low-cost, but the bowl must be drained by hand - choose automatic or differential-pressure drain if the unit is hard to reach), a round gauge reading in psi, and a check valve. The thread here is G (BSPP); PT is the standard and NPT can be ordered. A mounting bracket is included.
Quick checklist
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 publishes GFR flow as curves rather than a single rated figure, so we do not quote a number here. Tell us your line pressure and air demand and we will confirm the flow from the datasheet for this exact model on request.
This unit has a manual drain: someone drains the polycarbonate bowl by hand on a routine basis. If the unit sits in an awkward spot or the line runs unattended, order the same model with an automatic or differential-pressure drain instead. The 5 um element (code W) is the other key choice here - the standard grade is 40 um.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
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.