The AirTAC GFR300C08MLJF3TK AirTAC Filter Regulator 1/4 NPT 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 GFR300C08MLJF3TK is an AirTAC GFR-series filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is size 300 with 1/4 in NPT ports, a metal bowl with manual drain, 40 um standard filtration, the low-pressure regulator type, an embedded square gauge scaled in bar, a reverse/check valve fitted, and no mounting bracket. Maximum working (inlet) pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C (non-freezing); the medium is compressed air only.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, and options across drain type, 5 um filtration (code W), gauge scale (MPa, psi or bar), thread (PT standard; G and NPT are order options) and bracket. Flow for this family is published as curves rather than a single rated figure, so we confirm datasheet and sizing figures on request.
| Model | GFR300C08MLJF3TK AirTAC Filter Regulator 1/4 NPT |
|---|---|
| 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) |
Filtered, regulated air to the low-pressure clamping cylinders on a machining fixture, with the bar gauge giving the operator a direct setpoint readout and the check valve holding the setting against upstream dips.
Point-of-use air preparation for the low-pressure actuation section of a carton-sealing or wrapping line, where the manual-drain bowl is bled during scheduled changeover and cleaning.
Supplying filtered, pressure-controlled air to the auxiliary low-pressure circuits of textile machinery, where the 40 um element protects downstream control valves from water and particulate carryover.
Size 300 with 1/4 in NPT ports sits mid-range in the GFR line: step up to size 400 or 600, or down to 200, as your circuit's flow demand dictates - we confirm the flow curves against your application before you order. Drain choice matters: this unit has a manual drain (code M), which suits attended installations where an operator bleeds the bowl; automatic or differential-pressure drains suit unattended lines. Filtration is the 40 um standard element; specify 5 um (code W) if downstream valves or instruments need finer protection. The embedded square gauge is scaled in bar here; MPa and psi scales are available, and an external round gauge is optional. PT is the standard thread, with G (BSPP) and NPT as order options. This unit carries no mounting bracket (code J); the low-pressure regulator type (code L) is chosen where the circuit works below standard regulation ranges - its exact range is not published, 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 flow for the GFR family as performance curves, not as a single rated figure, so there is no one l/min or SCFM number we can honestly quote. Tell us your line pressure, downstream demand and acceptable pressure drop, and we will confirm the sizing from the datasheet curves on request before you order.
The L code means this unit carries the low-pressure regulator variant rather than the standard one; its exact regulation range is not published in the listing, so confirm it with us against your setpoint. The M code means a manual drain: collected water is discharged by opening the bowl drain by hand, which suits installations that are checked regularly rather than fully unattended lines.
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.