The AirTAC GFR300-10T AirTAC Filter Regulator NPT3/8, 40 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 PT3/8" 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 GFR300-10T is a filter regulator: one body that removes water and particulate from compressed air and then regulates downstream pressure. This size 300 unit carries a 3/8 in NPT port, a 40 um standard filter element, and a differential-pressure drain that bleeds collected condensate automatically whenever the pressure drop across the element is high enough. The regulator is the standard type with a setting range of 0.15-0.9 MPa (20-130 psi), and this configuration is fitted with an external round gauge reading in psi. The polycarbonate bowl is protected by a metal bowl guard, and a mounting bracket is included.
This is a genuine AirTAC part. The GFR family is published in sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, optional 5 um (W) elements, automatic or manual drains, square or round gauges with MPa, psi or bar scales, and G or NPT thread variants. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR300-10T AirTAC Filter Regulator NPT3/8, 40 um |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (NPT 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 — round, psi 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. |
|---|---|
| 10 | Port size PT3/8". 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). |
| C | Gauge shape: Round. C is round, F is square. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT 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 · PT3/8" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
Feeds clean, regulated air to the tool-clamp and chip-clearing circuits of a CNC machining centre, with the 40 um element catching pipe scale and the psi gauge giving the operator a direct setpoint readout.
Sits at the drop of a carton-sealing or case-packing conveyor to condition and regulate the air feeding cylinders and grippers, with the differential-pressure drain removing condensate without line stops.
Installed at a spray-booth air drop where water and particulate in the supply would spoil finish quality; the regulator holds a steady gun pressure and the round gauge lets the operator verify it in psi.
Start with the port and body size: this unit is size 300 with a 3/8 in NPT port; smaller 200 and larger 400/600 bodies step the port and flow capacity up or down. Choose the drain to match the installation: differential-pressure (this unit) needs no attention, automatic drains continuously, and manual drain suits dry, supervised installations. The element is 40 um standard; specify the W code for 5 um where finer filtration is needed. Gauges are available embedded square or external round, in MPa, psi or bar scales - this unit has a round psi gauge. Thread is PT as standard with G (BSPP) and NPT as order options; brackets are included on this code.
Because catalogue flow is published as curves rather than a single rated number, send us your application's flow and pressure requirements and we will confirm the correct size against the datasheet 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 the GFR series as curves, not as a single rated figure, so we do not quote a number here. Tell us your required flow and working pressure and we will confirm the sizing from the datasheet on request.
The differential-pressure drain opens automatically to expel collected condensate when the pressure drop across the 40 um element rises, so it needs no manual attention. If your line runs at low, steady flow where that trigger may not occur, or you prefer controlled draining at shutdown, the automatic (A) or manual (M) drain versions of the same size are available to order.
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.