The AirTAC GFR40010MLJC3WTK 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 manual drain and regulates 0.05 - 0.9 MPa (7 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The GFR40010MLJC3WTK is an AirTAC GFR400 filter regulator: water and particulate filtration plus pressure regulation combined in a single body. This configuration is the size 400 unit with a 3/8 in NPT port, a fine 5 um filtering element (code W), a manual drain for emptying collected condensate, and the low-pressure regulator type for circuits that run below standard shop-air pressures. It is fitted with an external round gauge reading in bar, and a reverse/check valve (code K) is built in. 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 to 1 inch, and options include drain type, 40 um or 5 um filtration, gauge style and scale, PT/G/NPT threads, and bracket choice. Flow is published in the catalogue as curves rather than a single rated figure, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GFR40010MLJC3WTK AirTAC Filter Regulator NPT3/8 |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (NPT thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 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 | Manual drain |
| Bowl material | PC |
| Pressure gauge | Fitted — round, bar 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". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 130 psi)). |
| L | Low-pressure type. Blank is standard, L is the low-pressure type. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 3 | Gauge scale: bar. 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) |
Feeding clamping cylinders on a workholding fixture that operates at reduced pressure: the regulator holds the setpoint, the 5 um element protects the valve stack, and the check valve holds the circuit if upstream supply dips.
A single-body filter regulator ahead of the cylinder and actuator bank on a cartoning or wrapping line, with the manual drain emptied during scheduled changeover and the bar gauge giving the operator a visible line-pressure reference.
Conditioning the air feeding pilot valves and small actuators on laboratory or test-bench automation, where the 5 um grade keeps fine debris out of sensitive components and the low-pressure type matches the reduced operating pressure.
Size 400 with a 3/8 in port sits in the middle of the GFR range; step up or down (200/300/400/600) to match the pipe size and air demand of the circuit, and ask us to confirm the flow curves against your requirement before ordering. This unit carries the 5 um element (W) rather than the 40 um standard, which suits downstream equipment that needs finer particle removal. Drain is manual, so an operator drains the bowl on a schedule; automatic or differential-pressure drains are available on other codes if you prefer unattended operation. The low-pressure regulator type is intended for circuits running below standard regulated pressures; its exact adjustment range is not published in the material we hold, so confirm it with us. The round gauge reads in bar; square embedded gauges and MPa/psi scales are alternatives. Thread here is NPT; PT is the standard and G (BSPP) is also an order option. No mounting bracket is included with this code (J), and brackets can be selected on other variants.
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 as curves, not as a single rated number, so we do not quote a lumped figure. Send us your line pressure and air demand and we will confirm the relevant datasheet curve and sizing for this 3/8 in unit on request.
In the model code, M selects the manual drain (you empty the bowl yourself on a schedule; automatic and differential-pressure drains are on other codes) and W selects the 5 um element instead of the 40 um standard. The L in the code marks the low-pressure regulator type, whose adjustment range we confirm on request.
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.