The AirTAC GFR300C08MJF3TK AirTAC Filter Regulator NPT1/4 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 GFR300C08MJF3TK is an AirTAC GFR300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is a size 300 unit with a 1/4 in NPT port, a 40 um standard filter element and a manual drain, so an operator opens the drain at the bottom of the bowl to expel collected condensate. A reverse (check) valve is fitted, the pressure is read on the embedded square gauge scaled in bar, and no mounting bracket is included. As a standard-type regulator it adjusts from 0.05 to 0.9 MPa (7-130 psi), with a maximum inlet pressure of 1.0 MPa (145 psi) and a working temperature of -5 to 70 C (non-freezing). The bowl on this unit is metal.
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, and with choices of drain type, 40 um or 5 um filtration, gauge scale and G, NPT or PT thread. Flow is published as curves rather than a single rating, so ask us and we will confirm the datasheet figures for this exact model on request.
| Model | GFR300C08MJF3TK AirTAC Filter Regulator NPT1/4 |
|---|---|
| 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) |
On a beverage bottling line, this unit feeds the pneumatic cylinders that drive filler valves and capping heads. The 40 um element strips water and pipe scale before they reach the valve bank, the regulator holds a steady supply pressure for consistent bottle handling, and the manual drain lets the line operator bleed accumulated condensate during changeover.
In a distribution-centre conveyor system, diverters and sorting gates run on 1/4 in air cylinders. This filter regulator sits at the drop to each gate section, cleaning the air and holding the set pressure so gates throw consistently, while the fitted check valve keeps the downstream circuit from losing its setting if the upstream supply is interrupted.
On a CNC machining cell, pneumatic clamps and tool-change actuators need clean, regulated air at a stable pressure to hold workpieces reliably. This unit filters the shop air to 40 um, regulates it with the bar-scaled square gauge as the reference, and its metal-bowled size 300 body with a 1/4 in NPT port fits the machine's standard air drop.
Start with the port and size: this unit is a size 300 body with a 1/4 in NPT port, one step up from the 200 series; step up to 400 or 600 if your line needs more flow capacity, since larger sizes carry larger ports. This version has a manual drain, which suits installations where an operator is present to bleed the bowl; choose automatic or differential-pressure drain codes if the unit will sit unattended. Filtration is the 40 um standard element; specify the W code for 5 um if downstream equipment needs finer protection. The fitted square gauge reads in bar; MPa and psi scales are available as alternative codes, and an external round gauge is optional. Thread is NPT here, with G (BSPP) and PT as order options. No mounting bracket is included with the J code, but a bracket can be ordered. One honest note on sizing: flow for this family is published as curves, not a single rated figure, so send us your application details and we will confirm the 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 flow for the GFR series as curves, not as a single rated figure, so we do not quote a flow number for this model. Tell us your application - the flow you need and the working pressure - and we will confirm the sizing against the datasheet curves on request before you order.
The M code in GFR300C08MJF3TK means the drain bowl is emptied by hand: an operator opens the drain to release collected water and dirt, which suits attended installations on a regular maintenance round. If the unit will run unattended, the automatic (A) or differential-pressure (blank) drain codes are the alternatives to specify. The K code at the end of this model means a reverse (check) valve is fitted; it is an option you can omit by choosing a code without 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.