The AirTAC GFR400-15T AirTAC Filter Regulator NPT1/2 5um Round Gauge 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 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 GFR400-15T is a size-400 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration carries a 1/2 in NPT port, a 5 um filter element (code W), a differential-pressure drain that bleeds collected condensate automatically whenever the pressure differential across the element is high enough, and a fitted reverse/check valve that holds downstream pressure if the upstream supply is lost. Regulation range is 0.15-0.9 MPa (20-130 psi) and the external round gauge is scaled in psi. The polycarbonate bowl suits non-freezing compressed-air service from -5 to 70 C at up to 1.0 MPa (145 psi) inlet.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600, with port sizes from 1/8 to 1 in, manual, automatic or differential-pressure drains, 40 um standard or 5 um (W) elements, embedded square or external round gauges in MPa, psi or bar scales, and G, NPT or PT threads. We confirm flow and datasheet figures for your application on request.
| Model | GFR400-15T AirTAC Filter Regulator NPT1/2 5um Round Gauge |
|---|---|
| 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 | Standard 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 | PC |
| Pressure gauge | Fitted — round, 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. Standard type, regulating 0.15 - 0.9 MPa (20 - 130 psi). 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". |
| (blank) | Drain: Differential-pressure drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 130 psi)). |
| (blank) | Standard type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. 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. |
| 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) |
Feeding a workshop air ring that serves punch and assembly presses: the 5 um element strips water and fines before they reach cylinder seals, while the regulator holds a steady working pressure at the presses and the check valve holds the circuit if the compressor unloads.
Conditioning the air that drives stopper and pusher cylinders on a bottling or cartoning conveyor: clean, regulated air keeps the divert actions repeatable, and the differential-pressure drain keeps condensate moving out without stopping the line.
A wall-mounted prep point for impact wrenches, ratchets and blow guns in a plant maintenance shop: the 1/2 in NPT port suits a main drop, the psi gauge lets technicians set tool pressure directly, and the bracket gives a tidy fixed mounting.
Size 400 with a 1/2 in port sits in the upper half of the GFR range, so step up or down (200/300/400/600) according to the air demand of the line rather than the pipe size alone. Choose the drain to match access: differential-pressure (this unit) needs no attention while air flows, automatic suits unattended duty, and manual suits intermittent use with an operator on site. The 5 um element (W) is the finer of the two published grades (40 um is standard) - pick it where downstream valves and instruments need cleaner air. The round psi gauge (code C2) is the external type; an embedded square gauge in MPa, psi or bar is the built-in alternative. Thread here is NPT (code T); PT is the catalogue standard and G is also orderable. A mounting bracket is included with this configuration.
Flow for the GFR series is published as curves, not as a single rated figure, so we do not quote a number here. Send us your flow and pressure requirements and we will confirm sizing against the datasheet before you order.
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 GFR400 flow as curves rather than a single rated figure, so we do not state a number here. Tell us your required flow and working pressure and we will confirm the sizing against the datasheet on request before you order.
K means a reverse/check valve is fitted: it prevents downstream air from flowing back toward the regulator if the upstream supply drops. The W code sets the 5 um filter element, the finer of the two published grades (40 um is standard), for cleaner air to valves, cylinders and instruments.
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.