The AirTAC GFR400-15 AirTAC Filter Regulator NPT1/2, 5 um, Manual Drain 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 size-400 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is built with 1/2 in NPT ports, a 5 um filter element (the finer of the two catalogue grades), a manual drain on the bowl, a round external gauge reading in psi, and a mounting bracket. The manual drain means an operator opens the drain at the bottom of the bowl to expel collected condensate, which suits installations visited on a regular maintenance round. With manual drainage, the regulator adjustment range is 0.05-0.9 MPa (7-130 psi), and the maximum working (inlet) pressure is 1.0 MPa (145 psi). Operating temperature range is -5 to 70 C, non-freezing. The bowl on this size is polycarbonate (PC).
This is a genuine AirTAC part. The GFR family is offered in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drainage, 40 um standard or 5 um (W) filtration, gauge style and scale options, and PT, G or NPT threads. Flow is published in the AirTAC catalogue as curves rather than a single rated figure, so ask us to confirm the flow and datasheet figures for your application before ordering.
| Model | GFR400-15 AirTAC Filter Regulator NPT1/2, 5 um, Manual Drain |
|---|---|
| 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, 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. 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. |
| (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. |
| (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) |
Feeding spray guns and air-assisted applicators on a finishing line, where the 5 um element helps keep water and particulate out of the air supply and the regulator holds a steady preset pressure at the booth.
Conditioning the air feeding carton sealers, case erectors and wrapping machines, with the manual drain opened during scheduled line checks and the psi gauge giving operators a visible setpoint.
Mounted on the bracket inside a control panel or machine manifold cabinet, regulating and filtering the supply branch that feeds valves and actuators on an automated assembly station.
Start with the size and port: GFR400 is the third of four sizes (200/300/400/600) and this unit carries 1/2 in NPT ports, so step up or down according to the air demand of the line - larger sizes carry larger ports and more flow. Choose the drain to match how the unit is attended: manual (this unit) for regularly visited installations, automatic for unattended duty, or the differential-pressure default. Choose the filter grade: 40 um is the standard element; the 5 um (W) element on this unit is the finer option for more demanding downstream equipment. Pick the gauge style and scale - here a round external gauge in psi - and confirm the thread: PT is the catalogue standard, while G (BSPP) and NPT (this unit) are order options. A bracket is included. Because flow is published as curves and not 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 in the catalogue rather than a single rated figure, so we do not quote one number. Tell us your application and we will confirm the relevant flow and datasheet figures for this unit on request before you order.
The M in the code selects a manual drain: an operator opens the bowl drain to expel collected condensate, so it suits installations checked on a regular round. With manual drainage the regulator adjustment range is 0.05-0.9 MPa (7-130 psi). Automatic and differential-pressure drain options are available in the same series if the unit will not be attended.
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.