The AirTAC GFR600-20ALJ AirTAC Filter Regulator NPT3/4 Low-Pressure 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 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 GFR600-20ALJ is a filter regulator: it removes water and particulate from compressed air and controls downstream pressure in a single body. This 600-size unit has a 3/4 in NPT port, an automatic drain that expels collected condensate without manual attention, and a 40 um standard filter element. It is the low-pressure type (L), and a round pressure gauge scaled in MPa is fitted. A reverse/check valve (K) is fitted to prevent reverse flow, and the unit is supplied without a mounting bracket (J). Maximum working (inlet) pressure is 1.0 MPa (145 psi); operating temperature is -5 to 70 C, non-freezing.
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, drain choices (differential-pressure, automatic or manual), an optional 5 um element (code W), gauge and scale options, and G or NPT thread options alongside the PT standard. On size 600 the bowl is aluminium alloy. The exact adjustment range of the low-pressure type is not published in our data, so we confirm it on request, along with flow and any other datasheet figures.
| Model | GFR600-20ALJ AirTAC Filter Regulator NPT3/4 Low-Pressure |
|---|---|
| Series | GFR600 filter regulator |
| Port size | PT3/4" (NPT thread) |
| Filtering grade | 40 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, MPa 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. |
| 1 | Gauge scale: MPa. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT 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" · 40 µm |
|---|---|
| One size down | GFR400 |
| Add lubrication | GFC600-20 (two-unit set) |
On fixture and clamping circuits that run at reduced set pressures, the GFR600-20ALJ filters the shop air and regulates the supply to the clamp cylinders, with the automatic drain keeping condensate away from the valves.
Feeding carton sealers, case packers and diverters on a packaging line, this 3/4 in filter regulator delivers clean, regulated air to the cylinders while the automatic drain handles condensate through long production runs.
In a machine-tool air preparation panel, the GFR600-20ALJ combines water and particulate removal with downstream pressure control in one body, and the fitted reverse/check valve prevents reverse flow in the circuit.
Size and port step up together (200/300/400/600, ports 1/8 in to 1 in), so choose the size whose flow curve covers your demand. The real, decodable choices for this family: drain type - automatic (A, as here) versus manual (M) or the differential-pressure default; filter grade - 40 um standard versus 5 um (W); gauge scale - MPa, psi or bar; thread - PT is the standard, with G and NPT as order options; and bracket or no bracket (J). This unit is the low-pressure type (L); its adjustment range is not published, so ask us to confirm it. Flow is published as curves rather than a single rating, so ask us to check sizing against your application before ordering.
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.
Flow for the GFR600 series is published as curves rather than a single rated figure, so we do not quote a rated flow number. Send us your application details and we will confirm the flow from the AirTAC datasheet on request.
A is the drain code: this unit has an automatic drain, so collected condensate is expelled without manual attention. Manual (M) and differential-pressure (blank) drains are available as decodable options in the same family.
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.