The AirTAC GFR300C08AJF1WT AirTAC Filter Regulator NPT1/4, 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 GFR300C08AJF1WT is an AirTAC GFR300 filter regulator: one body that removes water and particulate from compressed air and holds downstream pressure at your setpoint. This configuration is a 1/4 in NPT port unit with a 5 um filter element, an automatic drain that ejects collected condensate without routine manual attention, a standard regulator adjustable from 0.15 to 0.9 MPa (20-130 psi), and an embedded square gauge scaled in MPa. The polycarbonate bowl suits the size 300 frame, maximum inlet pressure is 1.0 MPa (145 psi), the operating range is -5 to 70 C (non-freezing), no reverse/check valve is fitted, and no mounting bracket is supplied.
This is a genuine AirTAC part. The GFR family is offered in sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, a choice of differential-pressure, automatic or manual drain, 40 um standard or 5 um (W) filtration, gauge and thread options, and standard or low-pressure regulation. Flow is published as curves rather than a single rating, so ask us to confirm sizing and datasheet figures for your application before ordering.
| Model | GFR300C08AJF1WT AirTAC Filter Regulator NPT1/4, 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) |
Conditioning the shop-air feed to a CNC machining centre's pneumatic tool-clamp and chip-door cylinders: the 5 um element keeps water and swarf out of the valve seats, and the regulator holds a steady clamp pressure visible on the MPa gauge.
Supplying regulated air to the diverters, stoppers and pushers along a packaging conveyor line, where the automatic drain handles condensate build-up between shifts and the 1/4 in NPT port matches the station's drop-leg fitting.
Feeding filtered, regulated air to the gripper and box-forming cylinders on a bottling-line case packer, with the 5 um element protecting seal kits and the square gauge letting operators verify setpoint at a glance.
Pick the size and port against the air demand of the line: this unit is size 300 with a 1/4 in NPT port, one step in the 200/300/400/600 range that runs from 1/8 to 1 in. This configuration carries the automatic drain, so no routine manual draining is needed; the 5 um element (code W) suits points of use that need finer filtration than the 40 um standard; and the square gauge reads in MPa, with psi and bar scales and an external round gauge available as options. Thread is NPT here, with PT as the catalogue standard and G (BSPP) also orderable, and no mounting bracket is included.
Flow for the GFR series is published as curves, not a single rated figure, so send us your flow and pressure requirements and we will confirm the correct size 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 flow for the GFR series as curves rather than a single rated figure, so there is no one l/min or SCFM number we can quote honestly. Send us your required flow and working pressure and we will confirm the sizing against the datasheet curves before you order.
W is the filter-grade code: this unit carries a 5 um element for finer water and particulate removal. The catalogue standard for the GFR series is a 40 um element, so if your application does not need the finer grade, the same size and port is available with the standard element.
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.