The AirTAC AirTAC GFR300C08MLF2K Low-Pressure Filter Regulator 1/4 PT 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 See datasheet ports, a differential-pressure drain and regulates 0.15 - 0.9 MPa (20 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The GFR300C08MLF2K is an AirTAC GFR-series filter regulator: water and particulate filtration plus pressure regulation combined in a single body, with a drain bowl but no lubricator. This size 300 unit carries a 1/4 in PT port and is the low-pressure regulator type. It is built with a manual drain, a 40 um standard filter element, an embedded square gauge reading in psi, a fitted reverse (check) valve, and a mounting bracket included.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and options including a 5 um element (code W), automatic or differential-pressure drains, G (BSPP) or NPT threads, and gauge scales in MPa, psi or bar; only size 600 uses an aluminium alloy bowl, while this 300 size uses a polycarbonate (PC) bowl. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. Because flow is published as curves rather than a single rating, we confirm the datasheet figures for your application on request.
| Model | AirTAC GFR300C08MLF2K Low-Pressure Filter Regulator 1/4 PT |
|---|---|
| Series | GFR300 filter regulator |
| Port size | See datasheet (PT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 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 | Differential-pressure drain |
| Bowl material | PC |
| Pressure gauge | Fitted — factory standard, Factory standard 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 0.15 - 0.9 MPa (20 - 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. |
|---|---|
| C0 | Port size See datasheet. This body offers 08 = PT1/4", 10 = PT3/8", 15 = PT1/2". |
| (blank) | Drain: Differential-pressure drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 130 psi)). |
| (blank) | Standard type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 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.
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 · See datasheet · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-C0 (two-unit set) |
Supplies filtered and regulated air to the clamp and fixture cylinders on a CNC machining cell, with the manual drain cleared as part of the daily start-up check.
Feeds the gate and diverter cylinders on a parcel conveyor line, where the 40 um element protects the directional valves from water and pipe scale.
Provides regulated instrument air to gauges and test cylinders on a laboratory test rig, with the psi-scale square gauge matching US-read instruments.
Choose the size and port against the air consumption of the downstream circuit: sizes 200, 300, 400 and 600 step up in port and flow capacity, and this unit sits at size 300 with a 1/4 in PT port. Because AirTAC publishes flow as curves rather than a single rated figure, ask us to confirm sizing against your application before ordering. The remaining choices are all decodable from the code: drain type (this unit is manual; automatic and differential-pressure drains are available), filter grade (40 um standard here, 5 um with code W), gauge (the embedded square gauge here reads psi; an external round gauge and MPa or bar scales are options), thread (PT is standard; G and NPT are order options), and bracket (included here; code J deletes it). Note this is the low-pressure regulator type; its adjustment range is not published in the catalogue, so confirm it with us.
Quick checklist
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 publishes GFR flow as curves rather than a single rated figure, so we do not quote a number here. Send us your application details and we will confirm the flow and datasheet figures for this unit on request.
This unit is the low-pressure type (code L). The catalogue lists adjustment ranges for the standard GFR regulator, but the exact range for the low-pressure type is not published, so we confirm it on request. The drain on this unit is manual; automatic and differential-pressure drains and a 5 um element (code W) are available to order.
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.