The AirTAC GFR300C08MLNWT AirTAC Filter Regulator, NPT1/4, 5 um 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 GFR300C08MLNWT is an AirTAC GFR300 filter regulator: one body that removes water and particulate from compressed air and regulates downstream pressure. This configuration carries a 1/4 in NPT port, a 5 um filter element (finer than the 40 um standard), a manual drain on the bowl, and the low-pressure regulator type. No gauge is fitted on this variant, and the mounting bracket is included.
This is a genuine AirTAC part from the GFR300 series, one of four sizes (200/300/400/600) offered with ports from 1/8 to 1 in and PT, G or NPT threads, plus drain, filter-grade, gauge and pressure-type options across the range. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR300C08MLNWT AirTAC Filter Regulator, NPT1/4, 5 um |
|---|---|
| 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) |
Feeds filtered, pressure-controlled air to the jet and cylinder circuits of a weaving line, with the low-pressure regulator holding a gentle set point and the manual drain cleared during shift checks.
Conditions the air feeding valves and actuators on a lab benchtop automation rig, where the 5 um element helps keep fine debris away from sensitive instrument pneumatics.
Supplies clean, regulated air to the clamp cylinders on a CNC fixture circuit, letting the setter dial in a low holding pressure while the manual drain is emptied at end of shift.
Size 300 with a 1/4 in NPT port suits circuits plumbed at 1/4 in; step down to 200 or up to 400/600 if your demand differs - we confirm sizing against the flow curves before you order. The 5 um element (code W) is the choice where downstream equipment needs finer filtration than the 40 um standard, and the manual drain means an operator drains the bowl on a routine, so it fits attended or intermittent-duty stations; automatic (code A) and differential-pressure (default) drains exist for unattended lines. This is the low-pressure regulator type, so its set-point range differs from the standard unit - confirm the exact range with us. Thread is NPT here; PT is the standard and G is also an order option. Bracket included; no gauge fitted, though gauge and scale options exist elsewhere in the series.
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. Send us your application details and we will confirm the flow from the datasheet curves before you order.
The M in the code means the bowl drain is opened by hand on a routine, which suits attended or intermittent-duty stations. For unattended or continuously running lines, choose the automatic drain (code A) or the differential-pressure drain (the series default) instead.
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.