The AirTAC AirTAC GFR600-25ALNWTK Low-Pressure Filter Regulator NPT1 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 PT1" 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 GFR600-25ALNWTK is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This size 600 unit is built with a 1 in NPT port, an automatic drain that ejects collected condensate without manual attention, and a 5 um filter element for finer filtration than the standard 40 um grade. The regulator is the low-pressure type, a reverse/check valve is fitted, and no gauge is supplied. The bowl on this largest frame is aluminium alloy, and a mounting bracket is included.
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, and can be ordered with manual or differential-pressure drains, the standard 40 um element, an embedded square or external round gauge, and PT, G or NPT threads. AirTAC publishes flow as curves rather than a single rated figure, so we confirm the datasheet and flow figures for your application on request.
| Model | AirTAC GFR600-25ALNWTK Low-Pressure Filter Regulator NPT1 |
|---|---|
| Series | GFR600 filter regulator |
| Port size | PT1" (NPT 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 | 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. 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. |
|---|---|
| 25 | Port size PT1". 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. |
| (blank) | Mounting bracket included. |
| 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. |
| W | Filtering grade 5 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 · PT1" · 5 µm |
|---|---|
| One size down | GFR400 |
| Add lubrication | GFC600-25 (two-unit set) |
Conditioning the air feed to spray guns and air-stirred coating pots in a paint or finishing line, where the 5 um element helps keep water and fine particulate out of the finish and the low-pressure regulator holds a gentle setting.
Filtering and regulating the supply to carton-sealing cylinders and divert gates on a packaging conveyor, with the automatic drain clearing condensate through humid shifts without an operator stopping to bleed the bowl.
Conditioning the air feed to jet nozzles and low-pressure actuation banks on a weaving or spinning line, where the fitted check valve holds the downstream circuit if the supply pressure dips.
Sizing starts at the port: this unit steps up to 1 in NPT on the size 600 frame, the largest in the GFR range; match the step against the flow your line needs and ask us to confirm the curve before ordering. The decodable choices are the drain (automatic here; manual and differential-pressure are available), the element (5 um here; 40 um is standard), the gauge (none fitted; embedded square or external round gauges with MPa, psi or bar scales can be specified), the thread (PT is the standard; G and NPT are order options) and the bracket (included here; on some frames it is optional). The low-pressure regulator type suits circuits that run below standard line pressure; its exact adjustment range is not published, so confirm it with us. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing.
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 family as performance curves rather than a single rated figure, so we do not quote a number. Send us your required flow and working pressure and we will confirm the datasheet curve and check the sizing against your application on request.
Yes. Gauge codes on GFR units add an embedded square gauge or an external round gauge with MPa, psi or bar scales; the N code means this unit is supplied without one. The same size 600 configuration can also be ordered with a manual or differential-pressure drain, the standard 40 um element instead of the 5 um grade, or a PT or G thread instead of NPT.
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.