The AirTAC GFR400C10ALF3WTK AirTAC Filter Regulator 3/8 in NPT 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 GFR400C10ALF3WTK is a size 400 filter regulator: water and particulate filtration plus pressure regulation combined in one body. This configuration is built with a 3/8 in NPT port, a 5 um filter element (the finer W grade, versus the 40 um standard), an automatic drain that vents collected condensate without manual attention, and a metal bowl. It is the low-pressure type, fitted with an embedded square gauge scaled in bar, a reverse/check valve, and a mounting bracket. Maximum working (inlet) pressure is 1.0 MPa (145 psi) and the operating 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, 5 um optional), gauge type and scale, thread (PT standard; G and NPT are order options), bracket, and reverse/check valve. Flow is published as curves rather than a single rated figure, so ask us and we will confirm the datasheet flow figures for your application on request.
| Model | GFR400C10ALF3WTK AirTAC Filter Regulator 3/8 in NPT |
|---|---|
| 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) |
Feeding filtered, regulated air to the clamp cylinders on a CNC fixture: the 5 um element keeps swarf-carried particulate out of the clamping valves, the low-pressure regulator holds the circuit at the reduced pressure the fixture was designed around, and the check valve holds the setting if upstream supply dips.
Conditioning the supply ahead of a valve island on a cartoning or case-packing line: water and fine particulate are stripped out before they reach the solenoid valves, the square bar gauge gives operators a local pressure readout, and the automatic drain keeps the bowl clear without a maintenance walk-round.
Supplying the air cylinders that divert, stop and push product along a conveyor line: the filter-regulator sits at the drop to the line, the 5 um grade protects the small control valves, and the included bracket mounts the unit at the frame so the gauge is visible to the line operator.
Start with size and port: the 400 frame with a 3/8 in NPT port suits lines plumbed at 3/8 in; step up or down through sizes 200/300/400/600 as your flow demand and piping change. This unit carries the 5 um element - choose it when downstream valves, cylinders or instruments need finer filtration than the 40 um standard; choose 40 um where coarser protection is enough. Drain type matters: this one is automatic (condensate vents itself), while differential-pressure (the default) and manual drains are also available in the family. The embedded square gauge here reads in bar; MPa, psi and bar scales and an external round gauge are options. Thread is NPT on this unit - PT is the catalogue standard and G (BSPP) is also an order option. A bracket is included; a reverse/check valve is fitted.
One honest note on sizing: AirTAC publishes flow for this family as curves, not as a single rated number, and the exact regulation range of the low-pressure type is not stated on the sheet we work from. Send us your application details and we will confirm the flow curve and regulation figures against your requirement 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 family as curves, not as a single rated figure, so we do not quote one number. Send us your application - inlet pressure, downstream demand and allowable pressure drop - and we will confirm the relevant flow-curve figures from the datasheet on request before you order.
This unit's bowl drains itself: the automatic drain vents collected condensate without anyone opening it, which suits unmanned or hard-to-reach installations. The differential-pressure drain (the family default) and the manual drain are the alternatives - manual means an operator drains the bowl, and the regulation range quoted for standard units is split by drain type. If you would rather handle drains on a schedule, ask us about the manual-drain variant of this size.
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.