The AirTAC GFR40010LF2WTK AirTAC Filter Regulator NPT3/8 Low-Pressure 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 PT3/8" 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 GFR40010LF2WTK is a filter regulator: one body that removes water and particulate from compressed air and then regulates downstream pressure. This 400-size unit is specified with a 3/8 in NPT port, the low-pressure regulator type, and the fine 5 um filter element (code W) for applications that need cleaner air than the standard 40 um grade. The differential-pressure drain bleeds collected condensate automatically whenever the pressure differential across the element is high enough, so no manual draining routine is required. A square pressure gauge scaled in psi is fitted, a reverse/check valve is included, and the mounting bracket is supplied.
This is a genuine AirTAC part from the GFR400 series. Across the GFR range you can choose sizes 200 to 600 with ports from 1/8 to 1 in, manual, automatic or differential-pressure drains, 40 um or 5 um filtration, gauge scale in MPa, psi or bar, and PT, G or NPT threads. Maximum working (inlet) pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C, non-freezing. Flow is published as curves rather than a single rating, so ask us to confirm the figures for your application.
| Model | GFR40010LF2WTK AirTAC Filter Regulator NPT3/8 Low-Pressure |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (NPT thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Low-pressure 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 — square, psi 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. The low-pressure type adjusts over a lower band than standard; we confirm the exact figures from the factory datasheet. 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. |
|---|---|
| 10 | Port size PT3/8". 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)). |
| L | Low-pressure type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. 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. |
| 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 · PT3/8" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
Feeds and regulates the air supply to clamping fixtures that must hold workpieces at a reduced, stable pressure, with the 5 um element keeping fine particulate out of the clamp cylinders and valves.
Installed ahead of packaging machinery that runs at reduced line pressure, providing filtered, regulated air to diverter gates, hold-down cylinders and sealing heads on a 3/8 in supply leg.
Conditions the bench air feed for test rigs and lab apparatus that need clean, finely filtered air at a controlled low pressure, with the psi gauge giving a direct local reading.
Start with the port step: this unit is 400 size with a 3/8 in NPT port; smaller and larger GFR sizes step through 1/8, 1/4, 3/8, 1/2, 3/4 and 1 in, so match the size to the air demand of the line. This configuration carries the low-pressure regulator type - the exact regulation range for the low-pressure variant is not published in our data, so confirm it with us against your set pressure before ordering. The 5 um element (W) suits finer air-quality needs; the standard grade is 40 um if your application does not require the finer filter. Drain is differential-pressure here; automatic (A) and manual (M) drains are orderable alternatives. The fitted square gauge reads in psi; MPa or bar scales and an external round gauge are options. Thread alternatives are PT (standard) and G (BSPP); the bracket can be omitted with code J.
Flow for this series is published as curves, not a single rated figure, so we do not quote a number on the page. Send us your application details and we will confirm sizing from 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 GFR400 series as curves, not as a single rated figure, so we do not state a number on the page. Tell us your application and we will confirm the relevant flow figures from the datasheet before you order.
The L code selects the low-pressure regulator variant, intended for applications where the set pressure is below the standard type's range; the exact range for this variant is not published in our data, so confirm it with us. The drain is differential-pressure: condensate collected in the PC bowl is discharged automatically when the pressure differential across the 5 um element is sufficient, with no manual draining needed.
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.