The AirTAC GFR300C10MLF3WT AirTAC Filter Regulator NPT3/8 Low-Pressure 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 GFR300C10MLF3WT is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This size 300 unit carries a 3/8 in NPT port, a 5 um filter element (the finer of the two published grades), a manual drain, and the low-pressure regulator type. An embedded square gauge with bar scale is fitted, the bowl is metal, a mounting bracket is included, and no reverse/check valve is fitted. 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 spans sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 in, and options for drain type, 40 um or 5 um filtration, gauge scale, thread (PT standard; G and NPT to order) and bracket. The exact adjustment range of the low-pressure type is not published in the material we hold, and rated flow is published as curves rather than a single figure, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GFR300C10MLF3WT AirTAC Filter Regulator NPT3/8 Low-Pressure |
|---|---|
| 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. |
|---|---|
| C1 | 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-C1 (two-unit set) |
On a form-fill-seal machine, jaw and sealing cylinders often run at deliberately low settings. This unit filters the supply to 5 um and regulates it in one body, with the bar-scale square gauge giving the operator a direct readout at the machine.
Air-operated clamps and swing cylinders on a CNC fixture need clean, regulated air. The 5 um element keeps fine particulate out of the clamp valves, and the low-pressure regulator type suits circuits that hold workpieces gently.
Bench-top process equipment and air-assisted coating applicators need moisture- and particle-free air at a stable, low setting. The manual-drain metal bowl lets an operator bleed accumulated water at each shift check.
The real choices in this family are the size and port step (200/300/400/600 with ports from 1/8 to 1 in, matched to the flow your line needs), the drain type (manual, automatic or differential-pressure), the filter grade (40 um standard, 5 um where finer filtration matters - as here), the gauge scale (MPa, psi or bar), the thread (PT standard, G or NPT to order) and the bracket. This configuration is size 300, NPT3/8, 5 um element, manual drain, low-pressure type, square bar gauge, bracket included. Flow is published as curves, not a single rating, so 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 line's flow and pressure requirement and we will confirm the correct size and the datasheet figures on request before you order.
The metal bowl collects water separated from the air, and with the manual drain an operator opens the drain by hand to discharge it; automatic and differential-pressure drain options exist elsewhere in the family. The 5 um element fitted here is the finer of the two published grades; 40 um is the standard alternative.
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.