The AirTAC GFR300C08LJC2WK AirTAC Filter Regulator PT1/4, 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 GFR300C08LJC2WK is a size-300 filter regulator: water and particulate filtration plus pressure regulation combined in a single body. This configuration carries a PT1/4 (1/4 in) port with PT thread, a fine 5 um filter element (the W grade, against the 40 um standard), a differential-pressure drain that bleeds collected condensate automatically as flow passes through, and a low-pressure regulator type for circuits set below the standard regulator band. A round external gauge on the psi scale is fitted for direct downstream reading, and a reverse (check) valve is built in. Supplied without a mounting bracket.
This is a genuine AirTAC part from the GFR300 series, one size within a range spanning sizes 200 to 600 with port options from 1/8 in to 1 in, drain choices, filter grades and gauge scales to suit the line. Max inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. Flow is published as curves rather than a single rating, so ask us to confirm sizing or any datasheet figure for your application before ordering.
| Model | GFR300C08LJC2WK AirTAC Filter Regulator PT1/4, 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 carton-sealing or case-packing line, delicate actuator circuits run at gentle setpoints well below a standard regulator's band. This low-pressure type GFR keeps the setting stable, the 5 um element keeps fines and water out of the directional valves, and the psi gauge lets the technician read the setpoint directly.
Test benches and lab manifolds need clean, finely filtered air at a controlled low pressure. The 5 um element protects sensitive instruments, the check valve holds the downstream setting if supply dips, and the differential-pressure drain clears condensate without opening the bowl during a run.
Pneumatic positioners and valve pilots on a food or chemical process line demand clean air at a steady, often low, setpoint. This filter regulator conditions the pilot supply in one body, the psi-scaled gauge gives operators a local reading, and the PT1/4 port matches standard pilot tubing take-offs.
Start with the port step: this unit is the size-300 body at PT1/4, so match it to the line size and the air demand of the circuit, stepping up to size 400 or 600 where demand is higher. The 5 um element (code W) is the right choice where downstream valves, cylinders or instruments need finer protection than the 40 um standard; use the standard grade where coarse water and particle removal is enough. The differential-pressure drain needs no operator attention but relies on flow to purge condensate, so consider a manual or automatic drain for low-flow duty. The fitted round gauge reads in psi; MPa and bar scales are also catalogue options. PT thread is standard on this model, with G (BSPP) and NPT available to order, and a mounting bracket can be added if the unit will be wall- or panel-fixed. The regulator is the low-pressure type, intended for setpoints below the standard band; its exact adjustment range is not published, so confirm it with us against your setpoint. Because flow is published as curves rather than a single rated figure, send us your application details 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 flow for the GFR series as curves, not as a single rated number, so there is no one figure we can honestly quote. Tell us your line pressure, setpoint and air demand, and we will confirm the correct size against the datasheet curves before you order.
The W code on this unit selects the optional 5 um filter grade, which removes finer particles and protects downstream valves, cylinders and instruments more closely than the 40 um standard element. The finer element is the right choice for pilot air, instrumentation and similar duty; the 40 um grade remains the catalogue default for general circuits.
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.