The AirTAC GFR300-10 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 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 GFR300-10 is an AirTAC GFR300 filter regulator: one body that removes water and particulate from compressed air and holds downstream pressure steady. This configuration carries a G3/8 (BSPP) port, an automatic drain that ejects collected condensate without manual attention, a 40 um standard filter element, an embedded square gauge scaled in psi, and a reverse/check valve that holds the set pressure when the upstream supply drops. No mounting bracket is included. Maximum inlet pressure is 1.0 MPa (145 psi), the regulation range is 0.15-0.9 MPa (20-130 psi), and the operating temperature is -5 to 70 C (non-freezing). The polycarbonate bowl suits a clear view of condensate level; only size 600 units use an aluminium alloy bowl.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, and options including manual or differential-pressure drains, a 5 um filter element (code W), a low-pressure regulator type, gauge scale in MPa, psi or bar, and G, NPT or PT threads. Flow is published as curves rather than a single rated figure, so we confirm the datasheet and sizing figures on request.
| Model | GFR300-10 AirTAC Filter Regulator, G3/8, Auto Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (G (BSPP) 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. |
| J | Supplied without bracket. |
| (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. |
| G | G (BSPP) 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) |
Point-of-use clean, regulated air for a carton-sealing or wrapping machine: the 40 um element strips water and pipe scale before it reaches the machine's valves, and the regulator holds a stable working pressure through shift-long cycles.
Feeding air cylinders and stopper gates on a conveyor line, where the check valve holds the set pressure against upstream dips so product-handling actuators do not sag mid-cycle, and the automatic drain keeps condensate out of the run.
Conditioning the supply to a bank of solenoid valves on a process skid: filtered, regulated air at a set psi protects valve seals and seats, with the square gauge giving operators a local pressure readout at the manifold.
Size 300 with a G3/8 port sits mid-range in the GFR family; step up to size 400 or 600 or down to size 200 depending on the flow your line needs - we confirm the flow curve against your application before you order. The automatic drain on this unit suits unattended duty; choose manual drain for supervised points or differential-pressure drain where you want discharge tied to flow. The 40 um element is the standard grade; specify code W for the 5 um element if finer particulate removal is required. The square gauge here reads in psi; MPa and bar scales are available. Thread is G (BSPP); PT is the standard thread and NPT is an order option. No bracket is included with this code - brackets can be ordered where panel or wall mounting is needed.
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 GFR300 as curves, not as a single rated number, so we do not quote a figure here. Send us your application's flow and pressure requirements and we will confirm the sizing against the datasheet curve before you order.
The A in the code GFR30010AJF2GK specifies an automatic drain, which discharges collected condensate from the bowl without anyone opening it - useful for unattended or hard-to-reach installations. Manual (code M) and differential-pressure (blank) drains are available as alternative configurations in the same series.
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.