The AirTAC GFR300-08 AirTAC Filter Regulator PT1/4 Manual Drain 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.
The AirTAC GFR300-08 is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration has a PT1/4 (1/4 in) port, a manual drain you open by hand to empty the PC bowl, a 40 um standard filter element, a round pressure gauge reading in psi, a reverse/check valve fitted, and a mounting bracket included. It regulates from 0.05 to 0.9 MPa (7-130 psi), accepts up to 1.0 MPa (145 psi) inlet pressure, and operates from -5 to 70 C (non-freezing).
This is a genuine AirTAC part from the GFR300 size of the GFR range, which spans sizes 200, 300, 400 and 600. Related options in the series include a 5 um element (code W), automatic or differential-pressure drains, G or NPT threads, and alternative gauge scales. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| Model | GFR300-08 AirTAC Filter Regulator PT1/4 Manual Drain |
|---|---|
| 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, 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. |
| (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.
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) |
Supplying clean, regulated air to pneumatic clamps on a machining cell, with the check valve helping hold the downstream circuit against backflow.
Conditioning the air feeding cylinders and grippers on a packaging line, where water and debris in the supply would upset repeatable motion.
Providing filtered, pressure-controlled air to bench-top test and automation rigs where a stable setpoint and a local psi gauge are needed at the rig.
Size and port set the air capacity: this GFR300 unit takes a 1/4 in PT port, while larger sizes (400, 600) carry bigger ports and higher flow. Because the drain here is manual, plan to open the bowl drain regularly; automatic (A) and differential-pressure (blank) variants are available if you prefer hands-off water removal. The 40 um element is standard - choose the W option for 5 um filtration. The fitted round gauge reads psi; MPa and bar scales are alternatives, and an embedded square gauge is the standard style. PT thread is standard on this model, with G (BSPP) and NPT as order options, and a no-bracket (J) variant exists. Flow is published as curves, not a single rated figure, so send us your flow requirement and we will confirm sizing against the datasheet before you order.
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. Send us your flow requirement and we will confirm the datasheet curve for this PT1/4 filter regulator before you order.
The M in GFR30008MC2K means the bowl drain is opened by hand to release collected water; automatic and differential-pressure drain variants exist in the GFR300 series if you prefer. This unit also carries a 40 um element, a round psi gauge, and a reverse/check valve (code K).
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.