The AirTAC GFR300C08JC3WTK 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 AirTAC GFR300 series combines water and particulate filtration with pressure regulation in a single body. This configuration carries a 1/4 in NPT port, a 5 um filter element for finer cleaning than the standard 40 um grade, a differential-pressure drain that bleeds condensate automatically while air flows, a round pressure gauge reading in bar, and a built-in reverse (check) valve that holds downstream pressure when the inlet supply is removed. The bowl on the 300 frame is polycarbonate (PC), and no mounting bracket is included with this code.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, PT, G and NPT thread options, manual or automatic drain variants, 40 um or 5 um elements, and embedded square or external round gauges with MPa, psi or bar scales. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. Flow for this series is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| Model | GFR300C08JC3WTK 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) |
Point-of-use conditioning ahead of solenoid valves on a packaging machine: the 5 um element keeps pilot air clean, the regulator holds a steady downstream setting, and the check valve holds that pressure when the main supply is removed.
Filtered and regulated air to clamping cylinders on a machining-centre workholding circuit, where the built-in check valve helps maintain clamp pressure if the shop-air supply drops.
Conditioning the supply to diverter and stopper cylinders on a bottling-line conveyor, with the differential-pressure drain clearing condensate automatically during continuous running.
Size and port set the capacity: the 300 frame with a 1/4 in NPT port sits mid-range in the GFR line, one step above the 200 and below the 400 and 600 frames, so step up or down a size if your demand sits near a frame limit. The 5 um element (code W) suits points of use that need cleaner air than the standard 40 um grade. The differential-pressure drain is the default and needs no manual operation while air flows; automatic (A) and manual (M) drain variants exist in the family. The round gauge here reads in bar; embedded square gauges and MPa or psi scales are also available. G (BSPP) and PT threads are order options if NPT does not match your pipework, and a bracket can be added where this bracketless code cannot be mounted.
Flow for this series is published as curves, not a single rated number, so we cannot quote a figure here. Send us your flow and pressure requirements and we will confirm the correct size against 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 GFR300 series as curves rather than a single rated figure, so we do not quote a number here. Tell us your required flow and working pressure and we will confirm the datasheet figures for this exact model before you order.
The W code specifies the 5 um filter element instead of the standard 40 um grade, for finer particulate removal. The K code adds a reverse (check) valve that holds downstream pressure when the inlet supply is removed. With the differential-pressure drain fitted, the regulation range is 0.15-0.9 MPa (20-130 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.