The AirTAC GFR600-25 AirTAC Filter Regulator NPT 1 in 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 AirTAC GFR600-25 is a size-600 filter regulator: it removes water and particulate from compressed air and holds a reduced downstream pressure in one body. This configuration is the low-pressure type (code L), built around a 1 in NPT port for large-flow main lines. It carries the standard 40 um filter element and a differential-pressure drain, which bleeds collected condensate automatically whenever the pressure differential across the bowl is high enough - no daily manual draining on a header duty. At size 600 the bowl is aluminium alloy, and a reverse/check valve (code K) is fitted. No pressure gauge is supplied with this code and no mounting bracket is included.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drain, an optional 5 um element (code W), gauge options, and PT, G or NPT threads. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR600-25 AirTAC Filter Regulator NPT 1 in 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 | 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". |
| (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. |
| 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 · PT1" · 40 µm |
|---|---|
| One size down | GFR400 |
| Add lubrication | GFC600-25 (two-unit set) |
Mounted at a large main air drop to filter incoming plant air and hold a reduced, steady pressure on a header that feeds low-pressure actuators and air knives across a production floor.
Placed on the compressed-air make-up of a dilute-phase conveying system, where the 1 in connection suits the main line and the low-pressure type matches the lower set pressure the conveying circuit needs.
Filters and regulates the low-pressure air feed to air-jet nozzles on a weaving line, with the 40 um element catching pipe scale and carried-over water before it reaches the jets.
Size and port are the first decision: step up through 200/300/400/600 as the line's required flow grows, and match the connection - here a 1 in NPT thread (PT is the catalogue standard; G and NPT are order options). The low-pressure type (L) is the right pick where the downstream set pressure sits well below a standard regulator's normal band; the exact range for this variant is not published, so confirm it with us. Drain choice: differential-pressure (this unit) for hands-off condensate bleeding, automatic for continuous bleed, or manual where you want drain timing under operator control. Filter grade is 40 um standard; specify W for 5 um where finer protection is needed. This code has no gauge and no bracket - add a gauge code if a local pressure readout is wanted, and a bracket if panel or wall fixing is required. Flow is published as curves, not a single rating, so send us your line conditions and we will confirm sizing against the datasheet before you order.
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 we do not quote a figure here. Tell us your line pressure, set pressure and expected air demand, and we will confirm the sizing against the datasheet curves on request before you order.
L marks the low-pressure regulator type, intended for applications where the downstream set pressure sits below a standard unit's normal band; the exact range for this variant is not published, so confirm it with us. The drain code is blank here, which means the differential-pressure drain: condensate collected in the aluminium bowl is bled off automatically when the pressure differential across the bowl is sufficient, with no manual draining needed in normal service.
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.