The AirTAC GFR600-20ALJF2K AirTAC Filter Regulator PT3/4 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 GFR600-20ALJF2K is a size 600 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one body. This configuration is a low-pressure type, so it is intended where the working pressure sits at the lower end of the scale. It carries a 40 um standard filter element, an automatic drain that handles condensate without manual attention, a reverse/check valve, and an embedded square gauge reading in psi. The 3/4 in PT port suits larger supply lines, and the size 600 bowl is aluminium alloy. 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 spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, and options including manual or automatic drain, a 5 um element (code W), gauge scale in MPa, psi or bar, and G or NPT thread in place of PT. Flow 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 | GFR600-20ALJF2K AirTAC Filter Regulator PT3/4 Low-Pressure |
|---|---|
| Series | GFR600 filter regulator |
| Port size | PT3/4" (PT 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 — square, 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). |
| F | Gauge shape: Square. C is round, F is square. |
| 2 | Gauge scale: psi. 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. |
| 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 a CNC machining line, the GFR600-20ALJF2K filters the shop air and holds a reduced, stable supply pressure to the clamping cylinders, while the 40 um element keeps dirt out of the directional valves and the automatic drain clears condensate without operator attention.
On a carton packaging conveyor, this unit conditions the 3/4 in main feed before it branches to the pusher and lift cylinders: filtered, regulated air at low working pressure, with the reverse/check valve holding the circuit if the upstream supply dips.
In a paint spray booth, finishing guns need air at a modest, steady pressure rather than full line pressure; this low-pressure type filter regulator sits at the booth drop, removing water and particles from the atomizing air and letting the operator set the working pressure on the psi gauge.
Start with the port and size step: this unit is size 600 with a 3/4 in PT port, the largest step in the GFR range - match it to your line size and required flow, and remember flow is published as curves, not a single rating, so ask us to confirm sizing against the application before ordering. This example is the low-pressure type (code L); its exact regulation range is not published in the standard tables, so confirm the set pressure you need with us first. The 40 um element is the standard grade; specify W if you need 5 um. The automatic drain (code A) suits unattended installations; manual and differential-pressure drains are the alternatives. The fitted square gauge reads in psi (code F2); MPa or bar scales and an external round gauge are options. Thread is PT as standard, with G (BSPP) and NPT available to order, and this unit is supplied without a mounting bracket (code J).
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 number, so we do not quote a figure that could mislead your sizing. Tell us your line size and the flow your application needs, and we will confirm the datasheet curve for the GFR600 at 3/4 in on request before you order.
The L code marks the low-pressure version of the regulator, intended for circuits working at the lower end of the pressure scale; its exact regulation range is not published in the standard tables, so confirm your set pressure with us. The A code is the automatic drain: it expels collected condensate from the aluminium bowl on its own, which suits unattended installations - the alternatives are a manual drain or the differential-pressure default.
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.