The AirTAC GFR40015ALJF1WTK AirTAC Filter Regulator NPT1/2 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 PT1/2" 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 AirTAC GFR400 series combines water-and-particulate filtration with pressure regulation in a single body, so one 1/2 inch unit conditions the air and sets the working pressure downstream. This configuration, the GFR40015ALJF1WTK, is the size 400 filter regulator with NPT1/2 ports, the fine 5 um filter element (code W), an automatic drain that expels collected condensate without manual attention, the low-pressure regulator type, an embedded square gauge scaled in MPa, and a built-in reverse/check valve (code K) that holds downstream pressure when the upstream supply is lost. No mounting bracket is included (code J). It handles compressed air only, with a maximum inlet pressure of 1.0 MPa (145 psi) and an operating temperature of -5 to 70 C, non-freezing. The bowl on this size 400 unit is polycarbonate (PC).
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 inch to 1 inch, and can be ordered with manual or differential-pressure drains instead of automatic, the standard 40 um element instead of 5 um, a round external gauge, G (BSPP) or NPT threads in place of the PT standard, and with or without a bracket. Because AirTAC publishes flow only as curves rather than a single rated figure, we confirm the datasheet and flow data for your application on request before you order.
| Model | GFR40015ALJF1WTK AirTAC Filter Regulator NPT1/2 |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (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 | PC |
| Pressure gauge | Fitted — square, MPa 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.
| GFR400 | G-series filter regulator, 400 body — sets the port range. |
|---|---|
| 15 | Port size PT1/2". This body offers 10 = PT3/8", 15 = PT1/2". |
| 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. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. C is round, F is square. |
| 1 | Gauge scale: MPa. 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 | GFR400 · PT1/2" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
On a cartoning or wrapping line fed from a 1/2 inch ring main, this filter regulator cleans the supply of water and fine particles, holds a steady low working pressure to the sealing and forming cylinders, and the automatic drain keeps condensate off the machine floor on lines that run unattended between shifts.
For fixture clamping circuits on a CNC machining cell, filtered and regulated air at a stable low setting protects clamp cylinders from pressure drift and from particles that could score seals, while the reverse/check valve holds the clamped position if the shop air supply drops.
At sortation diverters and stopper stations supplied from 1/2 inch drops, this unit removes water carry-over before it reaches the directional valves and sets the lower operating pressure those actuators need, with the 5 um element protecting the small pilot ports of the valves downstream.
Start with the port step: this unit is size 400 with 1/2 inch NPT ports, the right choice when your line runs larger-bore piping and you want the flow capacity of the bigger frame - match the size to your required flow, since flow is published as curves, not a single rating. Choose the drain to suit access: automatic (this unit) suits installations that are not checked daily; manual suits attended stations; differential-pressure drains automatically only when the element loading warrants it. This unit carries the 5 um element (W) for finer particle removal; the 40 um standard element is the usual choice for general upstream protection. The embedded square gauge here reads in MPa; psi or bar scales and an external round gauge are order options. Thread is NPT on this code; PT is the AirTAC standard and G (BSPP) is also available to order. No bracket is fitted (J), so plan your own mounting. Ask us to confirm sizing against the application before ordering - we will pull the curve data for you.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR400 series as curves, not as a single rated number, so we do not quote a figure that could mislead your sizing. Tell us your line pressure, set pressure and downstream consumption, and we will confirm the flow data from the datasheet for this exact 1/2 inch configuration before you order.
The L in the code marks the low-pressure regulator variant, intended for circuits that work below the standard regulating band; the exact range for this type is not published in the general table, so we confirm it on request. The A gives an automatic drain, which expels collected condensate by itself - the right pick when the unit is mounted where nobody drains a bowl regularly. If you prefer a manual or differential-pressure drain, that is an order option on the same series.
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.