The AirTAC GFR600-25LF2WK AirTAC Filter Regulator PT1 Low-Pressure 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 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 AirTAC GFR600-25LF2WK is a filter regulator: one body that removes water and particulate from compressed air and then regulates downstream pressure. This is the size 600 unit, the largest in the G series, with a 1 inch PT port. It is the low-pressure (L) type, so it is set up for circuits that work below standard line pressure; the exact adjustment range for this variant is not published, and we confirm it on request. Filtration is the fine 5 um element (code W) instead of the 40 um standard, the drain is the differential-pressure type that bleeds collected condensate automatically as flow passes through, an embedded square gauge scaled in psi is fitted, and a reverse/check valve (K) holds downstream pressure if the upstream supply drops.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 inch to 1 inch, thread options PT, G (BSPP) and NPT, filter grades of 40 um standard or 5 um optional, differential-pressure, automatic or manual drains, and gauge or no-gauge builds. Flow for this series is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application.
| Model | GFR600-25LF2WK AirTAC Filter Regulator PT1 Low-Pressure |
|---|---|
| Series | GFR600 filter regulator |
| Port size | PT1" (PT 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 | Differential-pressure 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. |
|---|---|
| 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. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 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 · PT1" · 5 µm |
|---|---|
| One size down | GFR400 |
| Add lubrication | GFC600-25 (two-unit set) |
On a cartoning or wrapping line where actuators run below standard plant pressure, this low-pressure GFR keeps the supply conditioned and regulated, with the check valve holding the circuit if the main air drops.
Feeding a 1 inch distribution manifold serving multiple machines, the 5 um element protects downstream valves and cylinders from fine particulate while the regulator sets the working pressure.
On a machining or assembly fixture that clamps at reduced pressure, the low-pressure type gives fine control at the working setting, the psi gauge gives operators a direct readout, and the differential-pressure drain keeps condensate off the fixture.
Start with the port: this unit is 1 inch PT, the top of the GFR range, so size the line to it rather than reducing into a smaller body. Choose the drain type deliberately: differential-pressure (fitted here) needs no timer or operator attention, automatic suits lines that idle, and manual suits infrequently visited installations. The 5 um element (W) is the right pick where downstream valves or instruments are sensitive to fine particulate; the 40 um standard element is the everyday choice. The square gauge here reads in psi; MPa and bar scales are the alternatives. PT is the standard thread, with G (BSPP) and NPT available as order options, and a mounting bracket is included.
One honest note before you order: AirTAC publishes flow for this series as curves, not a single rated number, and the low-pressure type's adjustment range is not in the published sheet. Send us your line pressure, required downstream pressure and air demand, and we will confirm the figures against the datasheet before you commit.
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 performance curves rather than a single rated figure, so we do not quote a number here. Tell us your line pressure, working pressure and air demand, and we will confirm the flow from the datasheet for your application before you order.
The L in the code marks the low-pressure regulator variant, intended for circuits working below standard line pressure; its exact adjustment range is not published, and we confirm it on request. The drain is the differential-pressure type: condensate collected in the aluminium bowl is discharged automatically as air flows through, with no operator action needed.
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.