The AirTAC GFR600-25LNWTK AirTAC Filter Regulator NPT1 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 GFR600-25LNWTK is an AirTAC GFR-series filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is the size 600 unit with a 1 in NPT thread, built as the low-pressure (L) type for circuits that run at reduced working pressure. It carries the W filter grade (5 um element instead of the standard 40 um), a differential-pressure drain that bleeds collected condensate automatically whenever the pressure differential across the bowl allows it, and a built-in reverse/check valve (K) that holds downstream pressure when the upstream supply is lost. No gauge is fitted (code N), so add your own downstream gauge if the circuit needs a visible setpoint. The exact regulation range of the low-pressure type is not published in the catalogue data we hold, so treat the setpoint window as confirmed on request.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, and can be ordered with manual or automatic drain, 40 um or 5 um filtration, gauge or no gauge, standard or low-pressure regulation, PT, G or NPT thread, and with or without a reverse valve. Because AirTAC publishes flow only as curves rather than a single rated figure, we confirm the datasheet and flow figures for this exact model on request before you order.
| Model | GFR600-25LNWTK AirTAC Filter Regulator NPT1 Low-Pressure |
|---|---|
| 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 | 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. |
| (blank) | Mounting bracket included. |
| 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. |
| 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. |
| 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) |
Fixture clamps and pallet-locating cylinders that are specified to run at reduced working pressure get both clean, 5 um-filtered air and a stable regulated supply from one body, with the check valve holding clamp pressure if the shop air drops.
Spray booths and coating heads are sensitive to water carryover and run at modest pressures; the 5 um element protects the finish from moisture and particulate while the low-pressure regulator sets the atomising pressure without a separate filter unit in the line.
On packaging lines with long runs of 1 in air piping feeding cylinders, diverters and grippers, this unit conditions the whole branch: filtered, regulated air at the header, with the differential-pressure drain keeping the aluminium bowl emptied during normal cycling.
Work the size and port first: size 600 with a 1 in NPT thread is the largest step in the GFR range, so match it to the pipe diameter and the air demand of the circuit, and step down only if the smaller sizes (200/300/400, 1/8 to 3/4 in) cover the line. Choose the low-pressure (L) type only when the circuit genuinely runs at reduced working pressure; the standard type covers normal plant pressure. The W code gives you the 5 um element - keep it where downstream valves, cylinders or instruments want finer air than the 40 um standard grade delivers, and accept that finer filtration loads the element faster.
This unit uses the differential-pressure drain (the default), which needs no drain fitting or manual attention but relies on flow events to purge the bowl; if the line has long idle periods, ask about the automatic (A) or manual (M) drain variants instead. The K code fits a reverse/check valve - useful where you want the downstream side held if supply fails - and the N code means no gauge is supplied, so plan your own pressure indication. Thread is NPT here; PT is the catalogue standard and G is also orderable. Bracket is included. Because flow is published as curves rather than a single rating, ask us to 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 figure, so we do not quote a flow number for this model. Tell us your line pressure, set pressure and the air demand of the circuit, and we will confirm the sizing against the datasheet curves for this exact unit on request before you order.
The N in the code means no gauge is fitted, so you supply your own downstream pressure indication if the circuit needs one (gauge-fitted variants are available in the family). L is the low-pressure regulation type, intended for circuits running at reduced working pressure - its exact range is not published, so we confirm it on request. K means a reverse/check valve is built in, holding downstream pressure if the upstream supply is interrupted.
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.