The AirTAC GFR300C08MLJNT 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 AirTAC GFR300C08MLJNT is a GFR-series filter regulator: one body that strips water and particulate from compressed air and then holds the downstream pressure at a set point. This GFR300 configuration carries a 1/4 in NPT port, a manual-drain metal bowl, a 40 um filter element and the low-pressure regulator type. No pressure gauge is fitted and no mounting bracket is included, so order those separately if the installation calls for them. 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 runs in sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and the catalogue options include automatic or differential-pressure drains, a 5 um element (code W), embedded square or external round gauges with MPa, psi or bar scales, a reverse/check valve, and G or NPT threads alongside the PT standard. Flow is published as curves rather than a single rated figure, so ask us and we will confirm the datasheet numbers for your line before you order.
| Model | GFR300C08MLJNT 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) |
Filtering and regulating the 1/4 in branch that feeds sealing cylinders and vacuum cups on a carton-sealing machine, with the manual drain emptied at each shift check.
Conditioning shop air for air-assisted spray guns at a finishing booth, where the low-pressure regulator type suits a light set point and the 40 um element strips rust and pipe scale.
A compact filter-regulator point for pneumatic indicators and small actuators around a production floor; the metal bowl and the no-gauge, no-bracket build keep the panel fit-out simple.
Size the unit by the flow your branch needs: GFR300 sits in the middle of the range with a 1/4 in port, stepping down to GFR200 or up to GFR400 and GFR600 as demand changes. This build is already fixed on several code choices - manual drain (M) against automatic (A) or differential-pressure (blank), the standard 40 um element against the 5 um W option, NPT thread against the PT standard or G option, and no gauge or bracket (codes N and J). The regulator is the low-pressure type; its exact adjustment range is not published, so confirm it with us against your set point. Because rated flow appears only as curves, send us your application and we will check the 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 family as curves, not as a single rated number, so there is no one figure we can quote honestly. Tell us your line pressure and the air demand of the equipment on this branch and we will confirm the sizing from the datasheet on request.
L marks the low-pressure regulator type; its exact adjustment range is not published, so confirm it with us against your set point. N means no pressure gauge is fitted - gauge-coded variants add a square or round gauge with an MPa, psi or bar scale.
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.