The AirTAC GFR300C10AJF2GK AirTAC Filter Regulator G3/8 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 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 GFR300C10AJF2GK is a filter regulator: it removes water and particulate from compressed air and holds downstream pressure steady in a single body. This size 300 unit is threaded G3/8, drains condensate automatically, filters to 40 um, reads outlet pressure on an embedded square gauge scaled in psi, and carries a built-in check valve so downstream air is retained when the supply is shut off. No mounting bracket is included (code J). Regulation range with the automatic drain is 0.15-0.9 MPa (20-130 psi), 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 ports from 1/8 to 1 inch, and options that include manual or differential-pressure draining, a 5 um filter element (code W), gauge scales in MPa, psi or bar, and G or NPT threads alongside the PT standard. AirTAC publishes flow as curves rather than a single rating, so ask us to confirm sizing figures from the datasheet for your application.
| Model | GFR300C10AJF2GK AirTAC Filter Regulator G3/8 Auto Drain |
|---|---|
| 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 an automotive trim line, filtered and regulated air keeps clamp cylinders closing at a consistent pressure shift after shift, while the automatic drain clears condensate without an operator visiting each station.
Feeding paint-spray guns in a woodwork or metal finishing booth, the unit strips water and pipe-scale from the air line and holds a steady gun supply pressure so finish quality does not wander with line pressure swings.
On a carton-forming and sealing conveyor, the filter regulator conditions the air feeding sealing and pusher cylinders, and the check valve holds the circuit's air when the main supply is isolated between batches.
Size the unit by port and expected flow: this G3/8, size 300 body sits mid-range in the GFR line, which steps from 1/8 inch (size 200) up to 1 inch (size 600). Choose the drain to match maintenance practice: automatic draining (this model) vents condensate without operator attention, while manual and differential-pressure drains are order options. The 40 um element is standard; specify W for 5 um when finer filtration is needed. Gauge scale (psi here, MPa or bar optional), G or NPT thread, check valve and bracket are all decodable from the code. Because AirTAC publishes flow as curves rather than a single rated figure, send us your pressure and flow requirements and we will confirm sizing from 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 GFR flow data as curves rather than a single rated number, so we do not quote a figure here. Tell us your working pressure and required flow and we will confirm the sizing from the datasheet on request.
Code A fits the automatic drain, which discharges collected condensate from the bowl without daily manual attention - useful on lines that run unattended. Manual and differential-pressure drains are available as order options in the GFR family. With the automatic drain, the regulation range is 0.15-0.9 MPa (20-130 psi).
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.