The AirTAC GFR400C10ALNWT AirTAC Filter Regulator 3/8 NPT Auto Drain 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 GFR400C10ALNWT is a GFR-series filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single compact body. This size 400 unit is threaded NPT3/8 (3/8 in), carries the fine 5 um filter element (code W) instead of the standard 40 um, and drains condensate automatically, so the bowl empties itself without manual attention. It is the low-pressure regulator type, is supplied without a gauge, comes without a reverse/check valve, and includes a mounting bracket. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, and is configurable by drain type (differential-pressure, automatic or manual), filter grade (40 um standard or 5 um), gauge and scale, thread (PT standard, with G and NPT as order options) and bracket. Flow 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 | GFR400C10ALNWT AirTAC Filter Regulator 3/8 NPT Auto Drain |
|---|---|
| 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) |
Fixture clamps and swing cylinders on an assembly cell need steady, gently regulated air and clean supply to keep seal life long. This unit filters to 5 um and regulates in one body, and the automatic drain keeps condensate out of the clamp circuit without an operator stopping to bleed the bowl.
Bench-top testers, sample conveyors and pneumatic dosing pumps in a lab or QC area are sensitive to both particles and pressure drift. The 5 um element protects the delicate actuators, the low-pressure regulator type suits circuits run well below full line pressure, and the included bracket allows tidy panel or frame mounting.
Baggers, carton sealers and divertor gates on a packaging conveyor run thousands of cycles a day on compressed air. This filter regulator conditions the supply to those actuators, the automatic drain handles the condensate that collects across shifts, and the 3/8 in port matches the line drops typical of such machines.
Start with the size and port: GFR400 with a 3/8 in port sits mid-range in the 200/300/400/600 step, so match the size to the air consumption of the circuit it feeds - step up a size if your flow demand is near the top of a smaller unit. Because flow is published as curves, not a single rating, send us your application details and we will confirm the right size before you order. Then choose the options: this unit pairs the fine 5 um element with an automatic drain, which suits clean, dry output with unattended condensate removal; the 40 um grade with manual or differential-pressure drain is the economy route where air quality demands are lighter. This is the low-pressure regulator type and has no gauge fitted - gauge variants with square or round dials and MPa, psi or bar scales exist in the family if you need a visual setpoint. Thread here is NPT; PT is the catalogue standard and G (BSPP) is also orderable. A mounting bracket is included.
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, not as a single rated number, so we do not quote a figure that could mislead your sizing. Tell us your application and operating pressure and we will confirm the flow from the datasheet curves on request, before you order.
The L in this code marks the low-pressure regulator variant, intended for circuits regulated well below standard line pressure; the exact adjustment range for this variant is not published in the material we hold, so we confirm it from the datasheet on request. The N code means no gauge is fitted - gauge variants with square or round dials in MPa, psi or bar scales are available in the GFR family if you want a visual setpoint.
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.