The AirTAC GFR300C08AJF3WT 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 GFR300C08AJF3WT is an AirTAC GFR-series filter regulator: water and particulate filtration plus downstream pressure regulation combined in a single body. This size 300 unit is threaded NPT1/4 (1/4 in), carries the 5 um filter element (the W grade, against the 40 um standard), drains collected condensate automatically, and reads outlet pressure on an embedded square gauge scaled in bar. Maximum inlet pressure is 1.0 MPa (145 psi) and the standard regulator adjusts from 0.15 to 0.9 MPa (20-130 psi). The polycarbonate bowl suits non-freezing compressed air from -5 to 70 C; no mounting bracket and no reverse/check valve are fitted.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and each size can be ordered with manual, automatic or differential-pressure drain, 40 um or 5 um filtration, square or round gauges in MPa, psi or bar scales, G, NPT or PT threads, and with or without a bracket. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your line size before ordering.
| Model | GFR300C08AJF3WT 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) |
On a workshop pneumatic press, this unit filters water and swarf from the shop air and holds the cylinder supply at the set pressure so forming and staking strokes stay repeatable. The 5 um element helps keep control valve seats clear, and the bar-scaled gauge gives the operator a direct setpoint check.
Carton-sealing and case-packing machines run air cylinders all shift, and condensate collects in the supply whenever the compressor cycles. The automatic drain on this filter regulator ejects that water without stopping the line, while regulation keeps sealing actuators working at a consistent pressure.
Gripper and clamping cylinders on an assembly robot need clean, regulated air to hold parts without crushing or dropping them. This unit conditions the cell supply at the drop, and the 5 um grade suits the pilot valves that switch the gripper circuit.
Choose the size and port against the air your application consumes: this unit is size 300 with NPT1/4 ports, and the family steps through sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in. Filtration is 5 um here; the 40 um standard element suits general supply, while the 5 um W grade protects more sensitive downstream equipment. Drain is automatic, which empties the bowl without operator attention; manual and differential-pressure drains are the other catalogue choices, and the adjustment range differs by drain type (this automatic-drain unit adjusts 0.15-0.9 MPa / 20-130 psi). The square gauge reads in bar, with MPa and psi scales and an external round gauge available as options. PT is the standard thread, with G (BSPP) and NPT as order options, and the bracket can be included or omitted. Because AirTAC publishes flow as curves rather than a single rated figure, send us your flow and pressure 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 as curves rather than a single rated figure, so we do not quote one number here. Tell us your operating pressure and air demand and we will confirm the flow from the GFR300 datasheet on request before you order.
The W code specifies the 5 um filter grade against the 40 um standard, for finer protection of downstream valves and cylinders, and the A code fits the automatic drain, which ejects collected condensate without manual attention. Note that drain type affects the adjustment range: this automatic-drain unit regulates 0.15-0.9 MPa (20-130 psi), while manual-drain versions widen that to 0.05-0.9 MPa (7-130 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.