The AirTAC GFR300C08MLJNTK 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 GFR300C08MLJNTK is an AirTAC GFR-series filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This size 300 unit has a 1/4 in NPT port, a 40 um standard filter element, a metal bowl with a manual drain you operate by hand, and a low-pressure regulator type. A reverse (check) valve is fitted, and no gauge or mounting bracket is included in this configuration. Maximum inlet pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C (non-freezing).
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 orderable options include a 5 um element (code W), automatic or differential-pressure drains, G (BSPP) or NPT threads, gauges and mounting brackets. Flow is published as curves rather than a single rating, so ask us to confirm figures against your application - we confirm datasheet details on request.
| Model | GFR300C08MLJNTK 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 CNC fixture or jig that clamps with air cylinders at reduced pressure, this unit filters the shop-air supply and regulates it down to the low setting the clamp circuit calls for, with the manual drain emptied during routine checks.
Feeding the cylinders and rotary actuators on a carton-sealing or case-packing conveyor, where the job is to deliver clean, moisture-reduced air at a steady low setting to keep the station running predictably.
On a paint or coating line, spray guns need clean air at a low, steady setting; this filter regulator does both jobs in one body, and the operator drains the bowl by hand at the start of each shift.
Size and port step up together across the GFR range (200/300/400/600, 1/8 to 1 in), so choose the size that matches the flow your circuit needs - larger sizes carry more flow. Drain choice matters: this unit has a manual drain you open by hand, while automatic and differential-pressure drains are orderable alternatives. The filter grade here is the 40 um standard; specify W for the 5 um element if finer filtration is required. Thread is NPT on this model; PT is the AirTAC standard and G (BSPP) is also orderable. Gauges and mounting brackets are options - this configuration has neither fitted. Flow is published as curves, not a single rated figure, so send us your application details and we will confirm sizing 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 this series as curves, not as a single rated figure, so there is no one l/min or SCFM number we can quote here. Send us your application details and we will confirm the flow figures from the datasheet on request.
The N in the code means no gauge is fitted. GFR units with a regulator can take an embedded square gauge or an external round gauge, with MPa, psi or bar scales. Tell us which scale you want and we will quote it as an orderable option.
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.