The AirTAC GFR400-10LC1WTK AirTAC Filter Regulator NPT3/8 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 GFR400-10LC1WTK is an AirTAC GFR400 filter regulator: water and particulate filtration plus pressure regulation combined in a single body, sized 400 with a 3/8 in NPT port. This configuration is the low-pressure regulator type (code L) with a 5 um filter element (code W) for finer dirt capture than the standard 40 um grade, a differential-pressure drain that bleeds accumulated condensate automatically as flow passes through, a round MPa gauge fitted, a reverse/check valve (code K) that holds downstream pressure when the supply is removed, and a mounting bracket included. The polycarbonate bowl lets you see the condensate level, and the maximum inlet pressure is 1.0 MPa (145 psi) with an operating temperature of -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR filter-regulator family is published in sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, optional 5 um filtration, automatic, manual or differential-pressure drains, square or round gauges with MPa, psi or bar scales, and PT, G or NPT threads. Because AirTAC publishes flow only as curves rather than a single rated figure, we confirm the exact flow and datasheet figures for this model on request before you order.
| Model | GFR400-10LC1WTK AirTAC Filter Regulator NPT3/8 |
|---|---|
| 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 — round, MPa 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). |
| C | Gauge shape: Round. C is round, F is square. |
| 1 | Gauge scale: MPa. 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 a machining-cell clamping fixture that holds workpieces at a deliberately low regulated pressure, with the 5 um element protecting the clamp valve seats and the check valve holding the clamp if the shop air drops.
Conditions the compressed air feeding bench-top lab apparatus that needs clean, finely filtered air regulated to a low setpoint, with the round MPa gauge giving a clear local pressure readout.
Supplies filtered, regulated air to the cylinders and actuators on a packaging conveyor, where the differential-pressure drain keeps condensate out of the valves during continuous running.
Start with the port and size: this unit is size 400 with a 3/8 in port, so step up or down a size if your line flow needs a different port. The 5 um element (code W) suits points of use that see finer contamination than the 40 um standard grade; choose the standard grade where coarse protection is enough. The differential-pressure drain needs no timer or operator, but a manual-drain variant is available where you prefer controlled draining, and an automatic drain where condensate loads are heavy. The round MPa gauge is fitted here; square-gauge and psi or bar scales are alternatives. Thread is NPT on this code, with PT (standard) and G available to order, and the bracket is included. The L code makes this the low-pressure regulator type, so confirm the regulation range and your required downstream pressure with us. Flow for this family is published as curves, not a single rating, so ask us to confirm sizing against your application before ordering.
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 GFR series only as curves, not as a single rated figure, so we do not quote a number here. Send us your line pressure, downstream setpoint and expected air demand, and we will confirm the flow from the datasheet and check the sizing against your application before you order.
The L is the low-pressure regulator type. On this filter regulator it means the regulating section is built for low downstream setpoints rather than the standard range, and the exact regulation range for the low-pressure type is not published on the sheet we work from. Tell us the downstream pressure your equipment needs and we will confirm on request whether this unit matches it.
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.