The AirTAC GFR300-10AF3WT AirTAC Filter Regulator NPT3/8 5um is a genuine G-series filter regulator: water separation, 5 µm particulate filtration and balanced-type pressure regulation combined in a single body. It has PT3/8" ports, a automatic 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 GFR300-10AF3WT is a size-300 filter regulator: it removes water and particulate from compressed air and holds downstream pressure steady in one body. This configuration carries a 3/8 in NPT port, a 5 um filter element (finer than the 40 um standard), an automatic drain that expels collected condensate without manual attention, and an embedded square gauge reading in bar. The standard regulator adjusts from 0.15-0.9 MPa (20-130 psi) with a maximum inlet pressure of 1.0 MPa (145 psi), and the unit operates from -5 to 70 C in non-freezing conditions. The polycarbonate bowl is fitted with a mounting bracket, and no reverse/check valve is included.
This is a genuine AirTAC part from the GFR filter-regulator line, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch. Across the range you can order manual or differential-pressure drains, a 40 um or 5 um element, square or round gauges with MPa, psi or bar scales, G (BSPP) or NPT threads in place of the PT standard, and bracket or no-bracket mounting. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR300-10AF3WT AirTAC Filter Regulator NPT3/8 5um |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (NPT thread) |
| Filtering grade | 5 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 | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, bar 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". |
| A | Drain: Automatic 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). |
| F | Gauge shape: Square. C is round, F is square. |
| 3 | Gauge scale: bar. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 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" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
Feeds filtered, regulated air to the tool-clamp and chip-clearing circuits of a CNC machining centre, with the 5 um element protecting the clamp cylinder's close-tolerance valve from fine particulate and the automatic drain handling condensate between shifts.
Placed ahead of the tape-head and flap-folding cylinders on a carton-sealing machine, holding a steady working pressure so box dimensions seal consistently while the automatic drain keeps moisture out of the sealing actuators.
Supplies conditioned air to the gripper and vacuum-generator circuit of a robotic pick-and-place cell, where the square bar gauge lets technicians verify set pressure at the cell and the bracket mounts the unit neatly on the cell's preparation plate.
Start with the port step: this size-300 unit carries a 3/8 in port, one step above the 1/4 in of size 200 and below the 1/2 in of size 400 - match the step to the pipe size and the flow your line needs, and we will confirm the flow curve against your demand. On drainage, the automatic drain here suits unattended duty; choose manual where an operator drains by routine, or differential-pressure drain where the bowl empties as the pressure differential rises. The 5 um element in this code is the finer option - order the blank (40 um) grade for general protection and reserve 5 um for downstream equipment that needs cleaner air. The square gauge reads in bar; MPa and psi scales are available, and an external round gauge is an option. Thread is NPT here - PT is the catalogue standard and G (BSPP) can be ordered. A mounting bracket is included; the J suffix deletes it. Because flow is published as curves rather than a single rating, 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 the GFR300 series as curves, not as a single rated number, so we do not quote a figure here. Tell us your line pressure and the air demand of your equipment and we will confirm the flow from the datasheet curve for this 3/8 in unit before you order.
The W in the code selects the optional 5 um element, one grade finer than the 40 um standard, for downstream equipment that needs cleaner air. The A selects the automatic drain, which ejects collected condensate on its own instead of waiting for a manual or differential-pressure drain cycle. Both are order options on the GFR300 series, and the standard 40 um element with a different drain can be ordered if your application does not need them.
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.