The AirTAC GFR600-25 AirTAC Filter Regulator NPT1 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 manual drain and regulates 0.05 - 0.9 MPa (7 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The AirTAC GFR600-25 is a filter regulator: one body that removes water and particulate from compressed air and then regulates downstream pressure. This size-600 unit has a 1 in NPT port for high-flow main lines, and it is the low-pressure type, so it is set up for circuits that work at reduced pressure rather than full line pressure. The 40 um element is the standard filtration grade, the manual drain lets an operator empty the aluminium bowl on a chosen schedule, and the embedded square gauge reads in bar. A reverse/check valve is fitted, holding downstream pressure if the upstream supply drops, and no mounting bracket is included with this configuration.
This is a genuine AirTAC part. The GFR family runs from size 200 through 600, with port options from 1/8 in to 1 in, PT as the standard thread and G or NPT as order options, a choice of manual, automatic or differential-pressure drain, a 5 um element (code W) where finer filtration is needed, gauge scale choices, and a reverse/check valve option. Flow is published as curves rather than a single rated figure, so ask us and we will confirm the datasheet numbers for your application.
| Model | GFR600-25 AirTAC Filter Regulator NPT1 Low-Pressure |
|---|---|
| Series | GFR600 filter regulator |
| Port size | PT1" (NPT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 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 | Manual 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". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 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. |
| 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) |
Drops feeding a beverage bottling or canning line, where the 1 in NPT port carries the plant's main air flow and the regulator holds the conveyors and actuators at a steady reduced pressure.
Actuation manifolds on water-treatment or process skids that run big quarter-turn valves at low set pressures, with the check valve holding position if the supply dips.
Feeds to vacuum-assist and blower-assist circuits on corrugated box converting equipment, where the 40 um element keeps water and debris out of the machine's air valves.
Step up or down through the GFR sizes (200 / 300 / 400 / 600) to match the port and flow path your line needs; this unit is the top of the range at 1 in NPT. Because it is the low-pressure type, choose it where the working circuit sits below normal line pressure - we will confirm the exact adjustment span on request. Pick the drain to suit access: manual (as here) for attended sites, automatic or differential-pressure where the bowl should clear itself. The 40 um element suits general plant air; specify 5 um (code W) where finer protection matters. The square gauge reads bar; psi and MPa scales and an external round gauge are options. PT is the standard thread, with G and NPT as orderable alternatives, and brackets are optional. Flow is published as curves, not a single rating, so have us 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, not as a single rated number, so there is no one figure we can honestly quote. Tell us your line pressure, set pressure and expected air demand, and we will confirm the datasheet curve and sizing for the 1 in size-600 unit before you order.
The code M sets a manual drain, so an operator opens the drain to empty collected water from the aluminium bowl - the right choice where someone is on site regularly. The F3 code fits the embedded square gauge with a bar scale; psi and MPa scales, an external round gauge, an automatic drain and a 5 um element are all orderable variations of the same GFR600 unit.
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.