The AirTAC GFR300C08MJF2G AirTAC Filter Regulator G1/4 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 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 GFR300C08MJF2G is an AirTAC GFR300 filter regulator: one body that removes water and particulate from compressed air down to 40 um and regulates downstream pressure over 0.05-0.9 MPa (7-130 psi). This configuration has a G1/4 (BSPP) port, a metal bowl with manual drain, an embedded square gauge reading in psi, a standard regulator, and no mounting bracket. Maximum inlet pressure is 1.0 MPa (145 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 sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and with choices of drain type, 40 um or 5 um filtration, gauge style and scale, thread (PT standard, G or NPT to order), bracket and reverse/check valve. Flow for this series is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GFR300C08MJF2G AirTAC Filter Regulator G1/4 Manual Drain |
|---|---|
| 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) |
Point-of-use conditioning for a CNC machining cell: the filter stage strips water and particulate from shop air before it reaches solenoid valves, while the regulator holds a steady set pressure for clamping and tool-change cylinders.
Conditioning the air feeding a packaging line's pick-and-place and sealing cylinders, so vacuum generators and sealing jaws see clean, regulated air at a consistent set pressure through every shift.
Mounted at the wall drop ahead of spray guns: the 40 um filter removes water that would mar the finish, and the regulator lets the operator set gun pressure at the station instead of at the compressor.
Within the GFR range you step size (200/300/400/600) and port (1/8 to 1 in) against the flow your line needs; the 300 size with a G1/4 port sits mid-range. Drain is a real choice: manual (this unit, which also gives the widest 0.05-0.9 MPa regulation range), automatic, or differential-pressure. Filtration is 40 um standard or 5 um with code W. The gauge is an embedded square unit with MPa, psi or bar scales (psi here), and an external round gauge is optional. Thread is PT as standard with G and NPT as order options, and a bracket can be added. Flow is published as curves, not a single rating, so send us your air demand 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. Without the K option, air cannot flow back through the unit. A filter regulator adds no oil to the line.
AirTAC publishes GFR300 flow as curves rather than a single rated number, so we do not quote a rated flow, Cv or SCFM figure. Send us your line pressure and air demand and we will confirm the sizing from the datasheet on request.
The M in the code selects a manual drain: collected water is expelled by opening the drain at the bottom of the metal bowl, rather than by an automatic or differential-pressure drain. It also gives the widest regulation range for this series, 0.05-0.9 MPa (7-130 psi).
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.