The AirTAC GFR300C08MJC3TK AirTAC Filter Regulator 1/4 in 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 AirTAC GFR300C08MJC3TK is a 300-size filter regulator that removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is threaded 1/4 in NPT, carries the standard 40 um filter element, and drains by hand through its manual drain, so it suits installations where an operator can bleed collected condensate as part of routine checks. Outlet pressure is set across the standard 0.05-0.9 MPa (7-130 psi) range, a round pressure gauge scaled in bar is fitted for direct reading, and a reverse/check valve is included to hold downstream pressure if the supply drops. No mounting bracket is included with this code.
This is a genuine AirTAC part from the GFR filter-regulator line, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in and PT, G or NPT threads. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. Flow is published as curves rather than a single rated figure, so ask us to confirm sizing or any datasheet figure against your application before ordering.
| Model | GFR300C08MJC3TK AirTAC Filter Regulator 1/4 in 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) |
Placed ahead of a small pneumatic press or clamping cylinder, this unit dries and filters the plant air supply and lets the setter dial in the working pressure on the bar-scaled round gauge, with the check valve holding the setting if the main supply dips.
On a carton-sealing or labelling conveyor, the 1/4 in NPT connection and 40 um element give the diverting and pusher cylinders clean air at a stable, manually set pressure, while the manual drain lets the operator bleed off condensate during shift checks.
At assembly stations running pneumatic torque tools and air ratchets, this filter regulator conditions the drop-line air and holds a consistent tool pressure, and the check valve keeps tools from losing set pressure during brief supply interruptions.
Choose the size and port step by the air your line consumes: 300 size with a 1/4 in NPT port sits in the middle of the GFR range, with smaller 200 and larger 400/600 units available when the flow demand differs. Drain type is a real choice: this code has a manual drain, which is the simplest option where someone is on site regularly; automatic or differential-pressure drains suit unattended installations. The 40 um element fitted here is the standard grade; specify the 5 um (W) option only where downstream equipment needs finer filtration. The fitted round gauge reads in bar; square embedded gauges and MPa or psi scales are the other catalogue choices. PT is the standard thread and G or NPT are ordered options - this code is specified in NPT. Bracket: this code omits it, so add one if you panel- or wall-mount. Because flow is published as curves rather than a single rating, ask us to confirm sizing against your application before ordering.
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 number here. Tell us your application and operating pressure and we will confirm the flow from the datasheet on request before you order.
The M in the code specifies a manual drain: condensate collected in the bowl is released by hand. It is the right choice where an operator is on site regularly; for unattended installations, the automatic (A) or differential-pressure (blank) drain versions of the same GFR300 filter regulator are the catalogue alternatives.
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.