The AirTAC AirTAC GFR600-20ALJC2WK Filter Regulator 3/4 in Low-Pressure is a genuine G-series filter regulator: water separation, 5 µm particulate filtration and balanced-type pressure regulation combined in a single body. It has PT3/4" ports, a automatic 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 GFR600-20ALJC2WK is a size-600 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is built for low-pressure service, is fitted with a 5 um filter element (the finer of the two catalogue grades), an automatic drain that ejects collected condensate without manual attention, a reverse/check valve, and an external round gauge reading in psi. The port is PT3/4 (3/4 in, PT thread standard), and the aluminium alloy bowl is the material used at size 600. 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 is published in sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, drain choices (differential-pressure, automatic or manual), 40 um standard or 5 um (W) elements, gauge and scale options, G/NPT thread variants and bracket choices. Flow for this series is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing figures for your application on request.
| Model | AirTAC GFR600-20ALJC2WK Filter Regulator 3/4 in Low-Pressure |
|---|---|
| Series | GFR600 filter regulator |
| Port size | PT3/4" (PT thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Low-pressure 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 | Automatic drain |
| Bowl material | Aluminium alloy |
| Pressure gauge | Fitted — round, psi scale |
| Reflux valve | Fitted (reverse flow permitted) |
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. The low-pressure type adjusts over a lower band than standard; we confirm the exact figures from the factory datasheet. 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.
| GFR600 | G-series filter regulator, 600 body — sets the port range. |
|---|---|
| 20 | Port size PT3/4". This body offers 20 = PT3/4", 25 = PT1". |
| A | Drain: Automatic drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 130 psi)). |
| L | Low-pressure type. Blank is standard, L is the low-pressure type. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| (blank) | PT thread. PT is the default; G is BSPP and T is NPT. |
| K | Reverse-flow (reflux) valve fitted. |
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 | GFR600 · PT3/4" · 5 µm |
|---|---|
| One size down | GFR400 |
| Add lubrication | GFC600-20 (two-unit set) |
On a CNC fixture line that clamps workpieces with low-pressure air cylinders, this unit filters the supply to 5 um, holds the reduced pressure the clamps need, and the automatic drain keeps condensate out of the circuit between shifts.
A conveyor-mounted air-knife drying station running at reduced line pressure draws its air through this filter regulator: the 5 um element protects the nozzles from particulate, the automatic drain handles the water load, and the psi gauge lets the line operator read the setting at a glance.
Pneumatically actuated gates, dampers and diverters on a plant utility header often run below main line pressure. This low-pressure-type filter regulator conditions the branch supply, the reverse/check valve holds the downstream side, and the 3/4 in port matches the header take-off.
Size 600 with a PT3/4 port is the largest step in the GFR range, so start there when the line and expected air demand are large, then step down to 400/300/200 if the circuit is smaller. This unit is the low-pressure type: the exact regulation window for the low-pressure variant is not published in our sheet, so confirm the set pressure you need with us before ordering. The 5 um (W) element suits circuits that need finer particulate removal than the 40 um standard; the automatic drain suits unattended duty where nobody will bleed the bowl. The round psi gauge is fitted as coded; embedded square gauges and MPa/bar scales are the other catalogue options. PT is the standard thread and G (BSPP) or NPT are order options. No mounting bracket is included with the J code.
One honest note on sizing: flow for this series is published as curves, not a single rated number, so we cannot quote a rated flow here. Send us your application details and we will confirm the datasheet figures against your requirement before you order.
Quick checklist
The aluminium-alloy bowl on the GFR600 suits harsher environments than a PC bowl. The reflux valve permits reverse flow 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 figure, so we do not quote a rated flow, Cv or SCFM number here. Tell us your application and expected air demand and we will confirm the datasheet flow figures against your requirement on request before you order.
This unit is the low-pressure type (code L), so its regulation window differs from the standard GFR variant, and the exact range for the low-pressure type is not published in our sheet. Maximum inlet pressure is 1.0 MPa (145 psi). Send us the downstream set pressure you need and we will confirm suitability on request.
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.