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 manual drain and regulates 0.05 - 0.9 MPa (7 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The AirTAC GFR400-15 is a filter regulator: it removes water and particulate from compressed air and holds downstream pressure steady in one body. This 400-size unit is fitted with a 1/2 in NPT port, a fine 5 um filter element, a manual drain for emptying the bowl, a round pressure gauge reading in bar, and a reverse (check) valve. The polycarbonate bowl lets you see condensate at a glance, and the regulator adjusts from 0.05 to 0.9 MPa (7-130 psi) with a maximum inlet pressure of 1.0 MPa (145 psi). Operating temperature is -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 port sizes from 1/8 to 1 inch, thread options PT, G and NPT, drain choices, 40 um or 5 um elements, and gauge options. Flow for this series is published as curves rather than a single rated figure, so ask us and we will confirm the datasheet and sizing figures 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 | 0.05 - 0.9 MPa (7 - 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 | Manual drain |
| Bowl material | PC |
| Pressure gauge | Fitted — round, bar 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 0.05 - 0.9 MPa (7 - 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". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 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. |
| 3 | Gauge scale: bar. 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) |
Mounted ahead of a directional-valve manifold on an automated assembly line, it dries and filters the air to 5 um and holds a steady regulated pressure so valve shift timing stays repeatable shift after shift.
Feeding cylinders and grippers on a carton-forming and sealing conveyor, the manual-drain bowl is emptied at shift start and the regulator holds the set pressure the actuators were sized for.
Installed at an individual air drop serving a production cell, it cleans plant supply air, regulates it to the tool or fixture requirement, and the check valve holds downstream pressure if the main supply dips.
Start with the port step: this unit is size 400 with a 1/2 in NPT port; if your line runs smaller or larger, the GFR series steps through 1/8, 1/4, 3/8, 1/2, 3/4 and 1 inch across sizes 200 to 600. Choose the drain to match access: manual drain (this model) suits stations an operator visits; automatic or differential-pressure drain suits unattended installs. Pick 5 um (this model) where finer particulate removal matters, or 40 um for general protection. Gauge scale is selectable (MPa, psi or bar) and this model carries a round bar gauge; the embedded square gauge is the standard alternative. Thread is NPT here, with PT and G available to order; a mounting bracket can be added where this no-bracket version needs one.
Because flow is published as curves and not a single rating, send us your application details 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 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 datasheet curve and correct sizing for you on request before you order.
The manual drain means an operator opens the bowl drain to expel collected condensate, which suits stations visited regularly; automatic or differential-pressure drain versions are available in the series for unattended installs. The fitted reverse (check) valve helps hold downstream pressure if upstream supply is interrupted.
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.