The AirTAC GFR300C08AJC2WGK AirTAC Filter Regulator G1/4, 5 um 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 GFR300C08AJC2WGK is an AirTAC GFR300 filter regulator: filtration and pressure regulation combined in a single body, sized 300 with a G1/4 (BSPP) port. This configuration carries the 5 um filter element (code W) for finer water and particulate removal than the 40 um standard element, an automatic drain that expels collected condensate without manual attention, a round external pressure gauge reading in psi, and a built-in reverse (check) valve that holds downstream pressure if the upstream supply is lost. It is ordered without a mounting bracket. Maximum inlet pressure is 1.0 MPa (145 psi), the standard regulator adjustment range with automatic drain is 0.15-0.9 MPa (20-130 psi), and the operating temperature range is -5 to 70 C (non-freezing). The bowl on this 300 size is PC (polycarbonate).
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, a choice of PT, G or NPT thread, differential-pressure, automatic or manual drains, 40 um or 5 um filtration, gauge style and scale options, and an optional reverse valve. Flow for this series is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing figures for your application on request.
| Model | GFR300C08AJC2WGK AirTAC Filter Regulator G1/4, 5 um |
|---|---|
| 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. |
|---|---|
| C0 | 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-C0 (two-unit set) |
Clean, regulated air feeding tool-clamp cylinders and chip-sweep nozzles on a machining center, with the 5 um element protecting fine-valve clamping circuits and the check valve holding clamp pressure if the shop supply drops.
Supplying stopper and diverter cylinders on a bottling conveyor, where the automatic drain copes with condensate from a long compressed-air run and the psi gauge lets line technicians verify set pressure at a glance.
Point-of-use preparation for pneumatic valve manifolds on lab automation equipment, where the 5 um grade guards small pilot valves and the compact single-body filter regulator fits tight control-cabinet space.
Step up or down through the GFR sizes (200, 300, 400, 600) and their port sizes (1/8 to 1 inch) to match the air demand of the circuit; the 300 size with its G1/4 port sits in the middle of the range. Choose the drain to suit access: automatic (this model) for unattended duty, manual where you want positive control, or the differential-pressure default. Choose 5 um filtration (this model) for finer protection of downstream components, or 40 um where coarser pre-filtration is acceptable. Select the gauge style (embedded square standard, external round optional) and its scale in MPa, psi or bar; this unit carries a round psi gauge. Thread is G (BSPP) here, with PT standard and NPT available to order, and the reverse valve is fitted on this code. Flow for the GFR series is published as curves, not a single rating, so 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 flow for the GFR series as curves rather than a single rated figure, so we do not quote a rated flow, Cv or SCFM number. Tell us your application and we will confirm the flow and sizing figures from the datasheet on request.
The W code on this unit selects the 5 um element instead of the 40 um standard, giving finer removal of water and particulate to protect sensitive downstream valves and cylinders. The A code selects the automatic drain, which expels collected condensate on its own instead of waiting for a manual drain, suiting unattended or hard-to-reach installations.
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.