The AirTAC GFR300C15ALJC2WK AirTAC Filter Regulator PT1/2, 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.
GFR300C15ALJC2WK is an AirTAC GFR filter regulator: filtration and pressure regulation combined in one body, with a drain bowl but no lubricator. This size 300 unit is threaded PT1/2 (PT is the standard; G and NPT are order options), carries the 5 um filter element (code W, against the 40 um standard element), an automatic drain, and the low-pressure type regulator. It is fitted with the optional external round gauge on the psi scale (the embedded square gauge is the family standard) and a reverse (check) valve (code K), and is supplied without a mounting bracket (code J). The polycarbonate bowl, standard at size 300, collects water and particulate for the automatic drain to handle. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR family runs from size 200 to 600 with ports from 1/8 in to 1 in, and can be ordered with differential-pressure, automatic or manual drains, 40 um or 5 um filtration, embedded square or external round gauges scaled in MPa, psi or bar, and PT, G or NPT threads. Because AirTAC publishes flow only as performance curves rather than a single rated figure, we confirm flow and datasheet figures for your application on request.
| Model | GFR300C15ALJC2WK AirTAC Filter Regulator PT1/2, 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. |
|---|---|
| C1 | 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-C1 (two-unit set) |
On a woodshop spray booth, the low-pressure type regulator holds a gentle, steady setting for the spray guns while the 5 um element and automatic drain keep clean, dry, regulated air at the gun.
On a beverage bottling line, the unit feeds pneumatic grippers and guide cylinders, with the 5 um element protecting directional valves and the automatic drain clearing collected condensate from the bowl.
On a CNC machining cell, the filter regulator sits ahead of pneumatic clamps and workholding cylinders; the round psi gauge gives operators a readable local setting and the check valve (code K) is fitted in the circuit.
Size and port are the first choice: 200, 300, 400 and 600 step up in port and flow capacity, so match the step to your air demand; at size 300 this unit takes PT1/2. Because AirTAC publishes flow as curves rather than a single rating, ask us to confirm sizing against your application before ordering. The remaining choices are all decodable from the code: drain type (automatic here; differential-pressure and manual are the alternatives), filter grade (5 um here; 40 um is the standard element), gauge (external round, psi scale here; the embedded square gauge is standard, with MPa, psi or bar scales), thread (PT standard; G and NPT are order options), and bracket (this unit is supplied without one). The low-pressure type regulator is the variant for lower set-pressure work; its exact adjustment range is not published, so we confirm it on request.
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 performance curves, not as a single rated number, so we do not quote a figure here. Send us your application details and we will confirm the flow and sizing from the datasheet on request.
This configuration carries code A, the automatic drain, which discharges collected condensate from the bowl without anyone having to open a manual drain each day. Differential-pressure and manual-drain versions exist in the same family if your maintenance routine prefers them.
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.