The AirTAC GFR600-25LJ 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 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 GFR600-25LJF2TK is a size-600 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is the low-pressure type, built with 1 in NPT ports for high-flow lines. It carries the standard 40 um filter element, a differential-pressure drain that bleeds condensate automatically whenever the pressure differential across the element is high enough, and a reverse/check valve that holds downstream pressure when the upstream supply is lost. The embedded square gauge is fitted with a psi scale, and the aluminium alloy bowl suits this largest frame in the series.
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, drain choices (differential-pressure, automatic or manual), 40 um or 5 um filtration, gauge and thread options, and standard or low-pressure regulation. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| Model | GFR600-25LJ AirTAC Filter Regulator NPT1 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 | Fitted — square, psi 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". |
| (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. |
| (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. |
| (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) |
Installed at the take-off of a 1 in compressed-air distribution main, it filters water and scale from the plant supply and holds a steady low regulated pressure to the machines fed from that header.
On pneumatic clamping and holding fixtures that must not see full line pressure, the low-pressure type regulates the supply down to a safe setting while the 40 um element keeps the clamp cylinders clean.
Feeding the valve manifold of a cartoning or case-sealing conveyor, it delivers filtered, regulated air and the check valve keeps actuators from drifting if the upstream supply drops.
Size 600 with 1 in NPT ports is the correct step when your line flow sits at the top of the G-series range; step down to 300 or 400 if your demand is smaller, since an oversized unit costs more without benefit. Filtration is the standard 40 um grade, which protects regulators, valves and cylinders on general plant air; choose the W variant only if finer protection is needed. The differential-pressure drain suits steady compressed-air supply, while the automatic-drain variant is worth considering for intermittent duty. The square gauge here reads in psi; MPa and bar scales are available if your team prefers them. Thread is NPT as ordered, with PT standard and G (BSPP) as catalogue options, and this J-coded unit ships without a mounting bracket. Because flow is published as curves and the low-pressure type's regulation range is not a single published figure, ask us to confirm sizing and set-pressure range 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 this series as curves, not as a single rated number, so we do not quote a figure. Tell us your line flow and pressure and we will confirm the datasheet curve and correct sizing for your application on request.
The L in the code marks the low-pressure regulator type, intended for reduced downstream settings below the standard range; the exact range is not published as a single figure, so confirm it with us for your setpoint. The fitted square gauge on this unit reads in psi, with MPa or bar scales available as order options.
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.