The AirTAC GFR600-25 AirTAC Filter Regulator NPT1, 5 um, Auto Drain 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 automatic 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 GFR-series filter regulator: water and particulate filtration plus downstream pressure regulation combined in one body. This 600-size unit is threaded 1 in NPT and is built in the low-pressure type, so it suits circuits that run at reduced working pressure rather than full line pressure. It carries the 5 um filter element (code W) for finer filtration than the standard 40 um grade, an automatic drain that expels collected condensate without manual attention, and a square pressure gauge reading in psi. At size 600 the bowl is aluminium alloy, and the maximum working (inlet) pressure is 1.0 MPa (145 psi) with an operating temperature range of -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR family is published in sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, and with choices of drain type, filter grade, gauge style and scale, thread (PT standard, G and NPT as options) and bracket. Because flow for this series is published as curves rather than a single rated figure, we confirm the datasheet and sizing figures for your application on request.
| Model | GFR600-25 AirTAC Filter Regulator NPT1, 5 um, Auto Drain |
|---|---|
| Series | GFR600 filter regulator |
| Port size | PT1" (NPT 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 | Automatic drain |
| Bowl material | Aluminium alloy |
| Pressure gauge | Fitted — square, psi scale |
| Reflux valve | Not fitted |
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". |
| A | Drain: Automatic 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. |
| T | NPT thread. PT is the default; G is BSPP and T is NPT. |
| (blank) | No reverse-flow valve (the default). |
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) |
A CNC machining cell with air-actuated clamps and workholding fixtures takes its supply through this unit: the 5 um element keeps contaminants out of the clamp cylinders and valves, the regulator holds a steady reduced working pressure for consistent clamping, and the automatic drain keeps condensate out of the circuit without an operator visiting the unit.
A packaging machine section that runs its actuators at reduced working pressure rather than full header pressure is fed through this low-pressure-type filter regulator at the 1 in NPT main, with the square psi gauge giving the line operators a direct local pressure reading and the automatic drain handling moisture drawn from the plant ring main.
A conveyor line using air knives or blow-off nozzles to dry or clear product draws from this 600-size unit: the 1 in NPT port matches the high-demand blow-off header, the 5 um filtration protects the nozzles from particulate, the regulator sets the reduced blowing pressure, and the automatic drain removes condensed water before it reaches the nozzles.
Start with the port step: this unit is the 600 size with a 1 in NPT connection, the largest port in the GFR range, so match it to the main line diameter and the air demand of the circuit it feeds. Choose the drain to suit access: this configuration has an automatic drain, which is the right choice where the unit is mounted in a position that is awkward to reach or where condensate loads are continuous; manual and differential-pressure drains are available on other codes. The 5 um element (code W) is the finer of the two published grades and suits valves and cylinders that need cleaner air than the 40 um standard. The square gauge here reads in psi; MPa and bar scales are also published options, and an external round gauge is available. PT is the standard thread; G and NPT are catalogue options ordered by code, and this unit is ordered with NPT. A mounting bracket is included.
One honest routing note: AirTAC publishes flow for this series as curves, not as a single rated number, and the exact regulation range of the low-pressure type is not stated in the material we hold. Ask us to confirm the flow curve and the low-pressure adjustment range against your application before ordering.
Quick checklist
The aluminium-alloy bowl on the GFR600 suits harsher environments than a PC bowl. Without the K option, air cannot flow back 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 figure, so we do not quote a flow number for this unit. Send us your application details - line pressure, downstream demand and acceptable pressure drop - and we will confirm the flow curve and sizing from the datasheet on request before you order.
The L in this code marks the low-pressure regulator type, intended for circuits that run at reduced working pressure rather than the full standard range; the exact adjustment range for this type is not stated in the material we hold, so we confirm it on request. The A marks the automatic drain: the bowl drains collected condensate by itself, with no manual intervention, which suits units mounted out of easy reach.
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.