The AirTAC GFR300C08JC1WTK 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 GFR300C08JC1WTK is a size-300 filter regulator: it removes water and particulate from compressed air and sets downstream pressure in one body. This configuration has a 1/4 in NPT port, a fine 5 um filter element, a differential-pressure drain that bleeds condensate automatically as flow passes through, a round external pressure gauge scaled in MPa, and a built-in reverse (check) valve that holds the downstream setting if the supply is interrupted. No mounting bracket is fitted. Maximum inlet pressure is 1.0 MPa (145 psi), the standard regulator adjusts from 0.15 to 0.9 MPa (20-130 psi), and the operating temperature range is -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR series is offered in sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 in, a choice of 40 um standard or 5 um fine filtration, differential-pressure, automatic or manual drains, square (embedded) or round (external) gauges in MPa, psi or bar scales, and PT, G or NPT threads. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| Model | GFR300C08JC1WTK 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) |
Feeding a bench pneumatic press or clamping fixture: the regulator sets a stable working pressure for consistent forming force, while the 5 um element keeps fine debris out of the valve and cylinder seals.
A point-of-use filter regulator on a cartoning or wrapping machine: clean, regulated air to the actuators and ejectors, with the check valve holding the setting through brief supply dips so the cycle is not lost.
Supplying pneumatic test benches and lab apparatus where instruments are sensitive to dirt: the 5 um grade polishes the air and the round MPa gauge gives a clear, direct pressure reading at the bench.
Size and port set the capacity: the 300 frame with a 1/4 in NPT port suits compact lines and machine-level supply; step up to 400 or 600 where demand is higher. The 5 um element (code W) is the finer choice over the 40 um standard - use it where valves, cylinders or instruments need cleaner air. The differential-pressure drain works unattended during flow; choose an automatic drain for unattended standby or a manual drain where an operator drains the bowl routinely. The round MPa gauge is external and easy to read; psi and bar scales and an embedded square gauge are orderable alternatives. NPT is the thread fitted here; PT and G threads are catalogue options, as is a mounting bracket. Flow is published as curves, not a single rating, so send us your demand figures and we will confirm sizing 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 as curves, not as a single rated figure, so we do not quote one number here. Tell us your line pressure, set pressure and air demand and we will confirm the flow and the full datasheet for this exact model on request before you order.
The W in the code specifies the fine 5 um filter element instead of the 40 um standard, and K specifies a built-in reverse (check) valve, which holds the downstream pressure if the upstream supply drops. Both are decodable from the model code; the drain on this unit is the differential-pressure type, which discharges condensate automatically during flow.
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.