The AirTAC GFR300-10 AirTAC Filter Regulator PT3/8 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 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 holds downstream pressure steady at your set point, in a single body. This configuration is the 300 size with a PT3/8 port, the standard 40 um filter element, and an automatic drain that expels collected condensate without manual attention. A round gauge on a psi scale is fitted so the regulated pressure can be read at a glance, and the standard regulator covers 0.15-0.9 MPa (20-130 psi) with a maximum inlet pressure of 1.0 MPa (145 psi). Operating range is -5 to 70 C (non-freezing), and the bowl on this 300 size is polycarbonate (PC).
This is a genuine AirTAC part. The GFR series is offered in sizes 200, 300, 400 and 600 with ports from 1/8 to 1 inch, a choice of automatic, manual or differential-pressure drain, 40 um standard or 5 um (W) filtration, G (BSPP) and NPT thread options, and gauge choices. Flow is published as curves rather than a single rating, so ask us to confirm the sizing figures from the datasheet for your application.
| Model | GFR300-10 AirTAC Filter Regulator PT3/8 Auto Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (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 | Automatic 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". |
| 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. |
| J | Supplied without bracket. |
| (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. |
| (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 · PT3/8" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
Feeding filtered, regulated air to the pneumatic cylinders that drive carton forming, sealing and ejection stations, with the automatic drain handling condensate through long production shifts.
Holding a steady set pressure to a small pneumatic press or clamping fixture at a work cell, where repeatable clamping force depends on stable downstream regulation.
Conditioning the air supply to grippers, air cylinders and ejectors on a robotic handling cell, protecting valves from water and particulate while keeping actuation pressure consistent.
Size and port set the air capacity: this 300-size unit takes a PT3/8 connection - step up to 400 or 600 for larger demand, or down to 200 for compact lines. The standard regulator adjusts 0.15-0.9 MPa (20-130 psi). Drain choice matters: automatic drain (this unit) suits unattended installations, while manual or differential-pressure drain suits lines that are checked regularly. Filtration is 40 um standard; specify W for 5 um where downstream equipment needs finer air. Thread is PT as standard, with G (BSPP) and NPT available to order; the -J code means no mounting bracket is included, so add one if the unit will be wall or panel mounted. Because flow is published as curves rather than a single rated figure, 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 GFR flow as curves rather than a single rated figure, so we do not quote one number here. Tell us your application and we will confirm the sizing from the datasheet on request before you order.
C is the external round gauge option and 2 is the psi scale, so this GFR300-10 arrives with a round psi gauge fitted. The embedded square gauge is the standard alternative, and MPa or bar scales can be specified instead.
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.