The AirTAC GFR600-25 AirTAC Filter Regulator 1 in NPT, 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 PT1" ports, a differential-pressure 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 GFR600-25 is an AirTAC filter regulator that removes water and particulate from compressed air and regulates downstream pressure in a single body. This 600-size configuration has a 1 in NPT port, the standard 40 um filter element and a differential-pressure drain that bleeds collected condensate automatically whenever the pressure differential across the element is high enough. The bowl on this size is aluminium alloy, the regulator is the low-pressure type, an embedded square gauge with a bar scale is fitted, a reverse/check valve is built in, and a mounting bracket is included. 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. GFR600 is the largest of the four GFR sizes (200, 300, 400, 600), and the family is also offered with other port sizes, thread options (PT standard, G and NPT to order), an automatic or manual drain instead of the differential-pressure drain, a 5 um element (code W) and different gauge scales. Flow for this series is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR600-25 AirTAC Filter Regulator 1 in NPT, Low-Pressure |
|---|---|
| Series | GFR600 filter regulator |
| Port size | PT1" (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 | Differential-pressure drain |
| Bowl material | Aluminium alloy |
| Pressure gauge | Fitted — square, bar 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. |
|---|---|
| 25 | Port size PT1". This body offers 20 = PT3/4", 25 = PT1". |
| (blank) | Drain: Differential-pressure 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. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. C is round, F is square. |
| 3 | Gauge scale: bar. 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 · PT1" · 40 µm |
|---|---|
| One size down | GFR400 |
| Add lubrication | GFC600-25 (two-unit set) |
Installed at the drop from a 1 in plant air main, the GFR600-25 strips water and debris from the supply and holds a low regulated pressure to the packaging machine's air cylinders, protecting seals and keeping wrapper tension and case-clamp action consistent through the shift.
On a machining cell where workpieces are held by air clamps, the unit filters the incoming compressed air and regulates it down to the gentle, stable pressure the clamps need, so parts are held firmly without being crushed or marred.
Mounted ahead of the stopper, gate and pusher cylinders on a conveyor line, the filter regulator cleans the plant air and sets the low operating pressure those actuators run at, while the reverse/check valve holds the downstream circuit if the upstream supply is interrupted.
Step through the decodable choices in this order: pick the size and port against the air demand of the circuit - this unit is the 600 size with a 1 in NPT port, the largest step in the range. Choose the drain: differential-pressure (as fitted here) needs no operator attention, automatic drains continuously, and manual drain is emptied by hand. Choose the filter grade: 40 um is standard and a 5 um element (code W) is available where finer filtration is needed. Choose the gauge scale (MPa, psi or bar - this unit has a square gauge in bar) and the thread: PT is the standard, with G and NPT as order options. Bracket and reverse/check valve are also decodable choices. One honest routing note: flow for this series 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 the GFR series as curves rather than a single rated figure, so there is no one number we can honestly quote. Send us your inlet pressure, set pressure and the air demand of the circuit, and we will confirm the sizing from the datasheet curves before you order.
K means a reverse/check valve is fitted, so air is held downstream if the upstream supply is lost. The drain on this unit is the differential-pressure type (the default when no drain letter appears in the code): it discharges collected condensate automatically when the pressure differential across the filter element is high enough. An automatic drain (code A) or a manual drain (code M) can be ordered instead.
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.