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: it removes water and particulate from compressed air and holds downstream pressure in a single 1-inch (NPT1) body. This unit is the low-pressure type, fitted with a manual drain, a 40 um standard filter grade, a round gauge scaled in bar, and a reverse/check valve. The size-600 bowl is aluminium alloy, and a mounting bracket is included.
This is a genuine AirTAC part from the GFR series, which spans sizes 200 to 600 with ports from 1/8 to 1 inch and options for drain type, filter grade, gauge and scale, thread and bracket. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing). Flow is published as curves rather than a single rating, so ask us to confirm sizing and datasheet figures 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 — round, 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. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. 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) |
On a filling or packaging line, the 1-inch NPT main feeds banks of pneumatic actuators; this unit filters water and particulate out of the supply and holds the line at the reduced pressure the machine section calls for.
Quarter-turn actuators on process valves need clean air supplied at a steady, reduced setting; this filter regulator conditions the 1-inch actuation supply and its check valve holds the setting against supply fluctuations.
A large clamp or hold-down cylinder on a machining fixture runs from a filtered, regulated branch; the low-pressure type suits circuits where the clamp force is set at a reduced pressure, with the round bar gauge for local setting.
Choose GFR by size and port: this 600-size unit takes 1-inch NPT threads for mains where larger piping is needed, while 200-400 bodies cover 1/8 to 3/4 inch. Drain choice matters: a manual drain needs an operator to bleed the bowl, whereas automatic and differential-pressure drains discharge condensate without attention. Filter grade is 40 um as standard; specify W for a 5 um element. Gauges come as an embedded square unit or an external round one, scaled in MPa, psi or bar - this model carries a round bar gauge. Threads can be ordered in PT (standard), G (BSPP) or NPT, and a bracket is included.
Note that the low-pressure type has a different adjustment window from the standard unit and its exact range is not published; flow for all sizes is given as curves, not a single rating, so ask us to confirm both 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 we do not quote a number here. Send us your line pressure, downstream set pressure and expected air demand, and we will confirm sizing from the datasheet on request.
L makes this the low-pressure regulator variant rather than the standard one; its exact adjustment range is not published, so we confirm it on request. M gives a manual drain: condensate collects in the aluminium bowl until an operator opens the drain, unlike automatic or differential-pressure drains that discharge on their own. K means a reverse/check valve is fitted.
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.