The AirTAC GFR300C08C3WT AirTAC Filter Regulator 1/4 in NPT 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 GFR300C08C3WT is an AirTAC GFR300 filter regulator: filtration and pressure regulation combined in a single body. It removes water and particulate from compressed air downstream and holds the outlet pressure the downstream equipment was set for. This configuration carries a 1/4 in NPT port, the fine 5 um filter element (code W), a differential-pressure drain that bleeds collected condensate automatically when the pressure drop across the element rises, and an external round gauge reading in bar. The regulator is the standard type with a 0.15-0.9 MPa (20-130 psi) adjustment range, a mounting bracket is included, and no reverse/check valve is fitted. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing). The size 300 bowl is polycarbonate.
This is a genuine AirTAC part. The GFR series is offered in sizes 200, 300, 400 and 600 with a choice of port sizes, PT, G or NPT threads, differential-pressure, automatic or manual drains, 40 um standard or 5 um fine filtration, and embedded square or external round gauges in MPa, psi or bar scales. Flow is published by AirTAC as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GFR300C08C3WT AirTAC Filter Regulator 1/4 in NPT 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) |
Filter and regulate the air feeding solenoid valves and small cylinders on a packaging or bottling line, keeping condensed water and fine particles out of the valve stations while holding a steady working pressure.
Condition the compressed air feeding lab automation, analytical instruments or pneumatic test rigs, where the 5 um element protects sensitive components and the bar gauge gives a direct local pressure readout.
Prepare the air supply for conveyor diverters, stoppers and clamp actuators in a distribution or sorting facility, with the differential-pressure drain handling condensate without daily operator rounds.
Size and port: the GFR300 steps up from the 200 series with a 1/4 in port on this unit; choose the size step against the air demand of the circuit, since larger sizes carry larger ports and more flow capacity. Drain: the differential-pressure drain fitted here needs no operator attention; choose automatic (code A) for unattended drains, or manual (code M) where you want controlled, deliberate draining - note the manual-drain variant also widens the regulation range down to 0.05 MPa. Filter grade: 40 um is the standard element; this unit carries the 5 um fine element (W) for downstream equipment that needs cleaner air. Gauge: the round gauge fitted here reads in bar; square embedded gauges and MPa or psi scales are also available. Thread: PT is the standard thread and G (BSPP) or NPT are catalogue order options - this unit is ordered in NPT. A mounting bracket is included on this configuration.
One honest note on sizing: AirTAC publishes flow for this series as curves, not as a single rated number, so we do not quote a flow figure here. Send us your application details and we will confirm the flow and datasheet figures 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 we do not state a flow number here. Tell us your application and operating pressure and we will confirm the flow and datasheet figures for this 1/4 in, size 300 unit on request before you order.
The W code in GFR300C08C3WT selects the optional 5 um fine filtration grade instead of the 40 um standard element. Choose 5 um when the downstream equipment - precision valves, instruments or sensitive actuators - needs cleaner air; 40 um is sufficient for general plant air. The drain on this unit is the differential-pressure type, which discharges collected condensate automatically as the pressure drop across the element rises.
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.