The AirTAC GFR400-15 AirTAC Filter Regulator, 1/2 in NPT, 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 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 GFR400-15 is an AirTAC GFR400 filter regulator: one body that removes water and particulate from compressed air and holds downstream pressure at your set point. This configuration is built for a 1/2 in NPT port, filters to 5 um (the finer of the two catalogue grades), drains condensate automatically by differential pressure as the bowl fills, and carries a round pressure gauge scaled in MPa. A reverse/check valve is fitted, and the unit is supplied without a mounting bracket.
This is a genuine AirTAC part. The GFR line spans sizes 200, 300, 400 and 600 with port options from 1/8 in to 1 in, a choice of drain types, 40 um or 5 um filtration, gauge styles and scales, and G(BSPP) or NPT threads as order options. Rated flow is published as curves rather than a single figure, so ask us and we will confirm the datasheet numbers for your application on request.
| Model | GFR400-15 AirTAC Filter Regulator, 1/2 in NPT, 5 um |
|---|---|
| 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, 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. 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. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. 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) |
Point-of-use conditioning on the 1/2 in air drop feeding a CNC machining centre: the 5 um element keeps swarf-choked moisture and fine particles out of tool-change and clamping actuators while the regulator holds a steady set pressure for repeatable clamping.
Mounted ahead of the valve manifold on a packaging conveyor, the unit cleans and regulates the air driving the box-push and divert cylinders, with the differential-pressure drain clearing condensate between shifts without operator intervention.
Conditioning the pilot and actuation air on a quarter-turn valve skid: the check valve protects the set pressure against upstream dips, the 5 um grade suits positioner and solenoid pilot circuits, and the MPa gauge gives operators a local set-point readout.
Size and port step up together: 200, 300, 400, 600, with ports from 1/8 in to 1 in, so pick the size whose flow curve covers your demand at working pressure. This unit is size 400 with a 1/2 in NPT port. Filtration is 5 um here (40 um is the standard grade if you do not need finer). Drain is differential-pressure, which discharges automatically as condensate builds; automatic float and manual drains are the other catalogue choices on this family. The round gauge is scaled in MPa (psi and bar scales are also available). Thread is NPT on this code; PT is the standard and G(BSPP) can be ordered. A bracket can be added if you want panel or wall fixing.
One honest note before you order: AirTAC publishes flow for this family as curves, not as a single rated number, so send us your line pressure and air demand and we will confirm the sizing against the datasheet before you commit.
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 GFR family as curves, not as a single rated figure, so we do not quote a number here. Tell us your line pressure and the air demand of your equipment and we will confirm the sizing against the datasheet on request.
The W in the code GFR40015JC1WTK selects the 5 um element instead of the 40 um standard grade, which suits finer pilot and instrument circuits. The K selects a reverse/check valve that holds the downstream set pressure if supply pressure dips. Both are catalogue options on this family; 40 um and no check valve are the defaults if you prefer them.
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.