The AirTAC GFR400C15ALF3WT AirTAC Filter Regulator NPT1/2 is a genuine G-series filter regulator: water separation, 40 µm particulate filtration and balanced-type pressure regulation combined in a single body. It has See datasheet 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 GFR400C15ALF3WT is a filter regulator: it removes water and particulate from compressed air and holds downstream pressure steady in a single body. This size 400 unit is built with 1/2 in NPT ports, the finer 5 um filter element (code W), an automatic drain that ejects collected condensate without manual attention, and the low-pressure regulator type for circuits that run below standard line pressure. A square gauge scaled in bar is fitted so the setpoint is visible, a mounting bracket is included, and the polycarbonate bowl suits the -5 to 70 C (non-freezing) operating range with a maximum inlet pressure of 1.0 MPa (145 psi).
This is a genuine AirTAC part. The GFR family spans sizes 200 to 600 with ports from 1/8 to 1 in, and options include manual or differential-pressure drains, the 40 um standard element in place of 5 um, psi or MPa gauge scales, an external round gauge, and PT or G threads instead of NPT. Flow for this series is published as curves rather than a single rated figure, so ask us to confirm sizing and any datasheet figure against your application before ordering.
| Model | GFR400C15ALF3WT AirTAC Filter Regulator NPT1/2 |
|---|---|
| Series | GFR400 filter regulator |
| Port size | See datasheet (PT thread) |
| Filtering grade | 40 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 — factory standard, Factory standard 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 0.15 - 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. |
|---|---|
| C1 | Port size See datasheet. 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). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 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 · See datasheet · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-C1 (two-unit set) |
A packaging machine's sealing jaws run on regulated air below standard line pressure; this unit filters the supply to 5 um, drains condensate automatically between shifts, and lets the operator read the setpoint in bar.
Low-pressure air jets that hold lightweight cartons or film on a conveyor line get a clean, regulated supply; the 1/2 in NPT connection feeds the manifold and the automatic drain keeps water out of the nozzles.
Air-film conveyors that float delicate parts on a cushion of low-pressure air need water- and particle-free supply; the 5 um element and automatic drain protect the porous surface, and the included bracket simplifies mounting.
Choose the size by the port and flow step: size 400 with 1/2 in NPT ports is the larger mid-range step, with sizes 200, 300 and 600 giving smaller or larger connections. Drain choice matters: this unit carries the automatic drain, which suits installations that are not checked daily; manual and differential-pressure drains are the alternatives within the same family. The 5 um element (W) is the finer of the two published grades - the 40 um standard element is the choice where only coarse protection is needed. The fitted square gauge reads in bar; psi and MPa scales are options, and an external round gauge can be specified. PT is the standard thread and G or NPT are order options - this code specifies NPT.
Flow for the GFR series is published as curves, not a single rated figure, so send us your flow and pressure requirements and we will confirm sizing from the datasheet before you order. The low-pressure regulator type in this code has an adjustment range that is not published in the standard table - confirm it with us.
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 rather than a single rated figure, so we do not quote one number. Tell us your flow and downstream pressure requirements and we will confirm sizing from the datasheet before you order.
This code specifies the automatic drain, which ejects collected condensate on its own and suits installations that are not checked daily. The same GFR400 family is also available with a manual drain or a differential-pressure drain - tell us which you prefer when ordering.
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.