The AirTAC GFR600-20AJNTK AirTAC Filter Regulator NPT 3/4 in 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.
This GFR600-20AJNTK is an AirTAC GFR-series filter regulator: one body that removes water and particulate from compressed air and regulates downstream pressure. The 600 size carries a 3/4 in NPT port, an automatic drain that ejects collected condensate without anyone opening it, and a 40 um standard filter element. A reverse/check valve is fitted, so downstream pressure is held if the upstream supply drops. No gauge is supplied with this configuration, so add a separate gauge if you need to read the setting. The bowl on this size is aluminium alloy, the unit is rated to 1.0 MPa (145 psi) inlet, the regulator adjusts from 0.15-0.9 MPa (20-130 psi), and the working temperature range is -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR family spans 200, 300, 400 and 600 sizes with ports from 1/8 to 1 in, PT as the standard thread and G or NPT as order options, manual or differential-pressure drain alternatives, a 5 um (W) element option, gauge choices, and a low-pressure type. We confirm flow and other datasheet figures on request, because flow is published as curves rather than a single rating.
| Model | GFR600-20AJNTK AirTAC Filter Regulator NPT 3/4 in |
|---|---|
| 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 | 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 | Automatic drain |
| Bowl material | Aluminium alloy |
| Pressure gauge | Not fitted |
| 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. 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.
| 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)). |
| (blank) | Standard type. Blank is standard, L is the low-pressure type. |
| J | Supplied without bracket. |
| N | No pressure gauge (N). |
| (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. |
| 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) |
Drops feeding air rings and impact tools along an assembly line get one conditioning point: water and swarf are drained out automatically and the branch pressure is set once for the whole ring, with the check valve holding the line if an upstream valve cycles.
At the wall drop feeding a CNC machining cell, the 3/4 in port matches the shop main, the 40 um element keeps scale and pipe rust out of the machine's own valves, and the automatic drain handles condensate on a cell that runs unattended overnight.
The branch feeding spray guns in a paint booth needs clean, steady air: the filter stage strips water and particles before the gun, the regulator holds a fixed setting for the booth, and the check valve keeps the header from bleeding back during compressor unload.
Step through the decodable choices. Size and port: 200/300/400/600 with ports from 1/8 to 1 in; this 600 unit takes a 3/4 in NPT port, the usual pick for higher-flow branch lines. Drain: automatic (this unit) for unattended condensate removal, manual where someone checks the bowl routinely, or the differential-pressure default. Filter grade: 40 um standard, or 5 um (code W) for finer protection. Gauge: none fitted here (code N); gauges are available with MPa, psi or bar scales. Thread: PT is the standard, G and NPT are order options - this unit is specified NPT. Bracket: not included (code J); order one if you panel-mount. Flow is published as curves, not a single rating, so ask us to confirm 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.
AirTAC publishes flow for this series as curves, not as a single rated figure, so we do not quote a number here. Tell us your application and line conditions and we will confirm the sizing from the datasheet on request before you order.
N means no gauge is fitted with this configuration, and K means a reverse/check valve is fitted. A gauge can be added separately if you want to read the regulated pressure; gauges are offered in MPa, psi or bar scales as an ordering choice.
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.