The AirTAC GFR300-10 AirTAC Filter Regulator, NPT 3/8 in, Auto Drain 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 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 GFR300-10 is a filter regulator: it removes water and particulate from compressed air and sets downstream pressure in a single body. This configuration is the 300 size with a 3/8 in NPT port, an automatic drain that ejects collected condensate without manual attention, a 40 um standard filter element, an embedded square gauge reading in psi, a built-in reverse/check valve that holds the set pressure when upstream air is lost, and a mounting bracket included. The polycarbonate bowl suits this size, and the standard regulator adjusts from 0.15 to 0.9 MPa (20-130 psi) with a maximum inlet pressure of 1.0 MPa (145 psi).
This is a genuine AirTAC part in the GFR family, which spans sizes 200, 300, 400 and 600 with port options from 1/8 to 1 inch, G (BSPP) and NPT thread variants, manual or automatic drains, a 5 um optional element, and gauge scale choices. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR300-10 AirTAC Filter Regulator, NPT 3/8 in, Auto Drain |
|---|---|
| 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 | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, psi scale |
| Reflux valve | Fitted (reverse flow permitted) |
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. |
| 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. |
| K | Reverse-flow (reflux) valve fitted. |
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) |
Feeding clean, pressure-set air to a pneumatic press or clamping fixture, where the check valve holds the set pressure if the shop supply drops mid-cycle.
Conditioning the air feeding a packaging line's cylinders and actuators, with the automatic drain handling condensate on equipment that runs unattended across shifts.
Supplying filtered, regulated air to conveyor diverters, stops and gates, where the 3/8 in port and bracket-mounted installation suit a fixed machine frame.
Start with the port and size step: the 300 size carries a 3/8 in port, and stepping up to 400 or 600 gives larger ports and more flow capacity, while 200 suits smaller lines. Choose the drain to match the installation: automatic (this unit) suits unattended or hard-to-reach positions, manual suits periodic checks, and differential-pressure drain is the catalogue default. The 40 um element is standard; specify the W code for the 5 um grade where finer filtration is needed. Gauge scale is selectable (MPa, psi or bar) and the square gauge is embedded as standard, with an external round gauge optional. Thread is NPT here; G (BSPP) is the other order option, and PT is the catalogue standard. A bracket is included on this configuration.
Because flow is published as curves and not as a single rated figure, we cannot quote one number here. Send us your application details and we will confirm sizing against the datasheet curves before you order.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. The reflux valve permits reverse flow 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 application and required flow, and we will confirm the sizing against the datasheet curves on request before you order.
The A in the code sets the automatic drain, which ejects collected condensate by itself instead of needing a manual bowl drain - useful where the unit is mounted out of easy reach. The K sets a reverse/check valve, which holds the regulated downstream pressure if the upstream supply is interrupted. Both are decodable options on the GFR family, alongside manual or differential-pressure drains and units without the valve.
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.