The AirTAC GFR400-15 AirTAC Filter Regulator 1/2 in PT, 5 um 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 GFR400-15 is an AirTAC GFR400 filter regulator: filtration and pressure regulation combined in a single body for compressed air. This configuration carries a 1/2 in PT port, a 5 um filter element (the W grade, finer than the 40 um standard), an automatic drain that expels collected condensate without manual attention, and a low-pressure regulator type. It is fitted with the embedded square gauge scaled in psi, has no reverse/check valve, and ships without a mounting bracket. The polycarbonate bowl is standard at this size, with a maximum inlet pressure of 1.0 MPa (145 psi) and an operating temperature range of -5 to 70 C, non-freezing.
This is a genuine AirTAC part from the GFR series, which spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, and options including drain type, 40 um or 5 um filtration, gauge scales in MPa, psi or bar, G or NPT threads, and brackets. Flow figures for this series are published as curves rather than a single rating, so we confirm datasheet figures on request.
| Model | GFR400-15 AirTAC Filter Regulator 1/2 in PT, 5 um |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (PT 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, 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.
| 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. |
| 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. |
| (blank) | PT 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 | GFR400 · PT1/2" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
Clamp fixtures and swing cylinders on a CNC cell that run at reduced set-points get clean, moisture-picked air: the 5 um element protects seals, the automatic drain keeps the bowl clear between cycles, and the square psi gauge gives the operator a direct set-point readout.
Sorter diverters, pushers and gate cylinders on a packaging conveyor line often run below standard line pressure. This filter regulator conditions the branch feed, the automatic drain handles condensate on a continuously running line, and the 1/2 in PT port suits the main drop leg.
A laboratory or pilot-plant test rig needing finely filtered air at low regulated pressure uses the 5 um grade to keep particulates out of sensitive instruments, while the low-pressure regulator type and psi-scaled square gauge support precise, low set-point work.
Choose the GFR400 size step by matching the 1/2 in port against the flow your line needs; larger sizes carry larger ports and more flow. This unit is already specified with the 5 um element (W) - select 40 um instead if your application tolerates the standard grade. Drain choice matters: the automatic drain here suits unattended duty, while differential-pressure (default) and manual (M) versions are available to order. Gauge scale is selectable (MPa, psi or bar) and this unit carries the embedded square gauge in psi; PT is the standard thread with G (BSPP) and NPT as order options, and a bracket can be added. The low-pressure regulator type is intended for set-points below the standard range; the exact range for this variant is not published, so ask us to confirm it against your set-point before ordering. Because flow is published as curves rather than a single rating, ask us to confirm sizing against your application before you order.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. 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 number here. Tell us your application and required flow, and we will confirm the sizing from the datasheet on request before you order.
This GFR400-15 is the low-pressure regulator type (code L), and the exact range for that variant is not published in the material we hold. Send us your set-point and we will confirm suitability on request. If you need the standard range instead, the standard-type GFR400 in the same port is available to order.
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.