The AirTAC GFR40010ALF1TK AirTAC Filter Regulator NPT 3/8 in 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 PT3/8" ports, a automatic 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 GFR40010ALF1TK is a 400-size filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one body. This configuration is fitted with an automatic drain that expels collected condensate without manual attention, a 40 um standard filter element, a low-pressure regulator type, an embedded square gauge scaled in MPa, and a reverse/check valve. The port is 3/8 in with NPT thread, and a mounting bracket is included. The polycarbonate bowl suits non-freezing compressed-air service from -5 to 70 C, with a maximum inlet pressure of 1.0 MPa (145 psi).
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 in, and can be ordered with manual or differential-pressure drains, a 5 um (W) element, alternative gauge styles and scales, G (BSPP) or NPT threads in place of the PT standard, and bracket options. Because flow is published only as curves rather than a single rating, we confirm the datasheet and sizing figures for your application on request.
| Model | GFR40010ALF1TK AirTAC Filter Regulator NPT 3/8 in |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (NPT thread) |
| Filtering grade | 40 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 | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, 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". |
| A | Drain: Automatic 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. |
| 1 | Gauge scale: MPa. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 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" · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
Feeds clamp and hold-down cylinders on an assembly press with filtered air at a steady low setpoint, while the automatic drain keeps condensate out of the fixture circuit between shifts.
Conditions the shop-air line feeding tool-change actuators and air bearings on a CNC machining centre, with the square MPa gauge giving the operator a direct read of downstream pressure.
Filters and regulates the air driving diverters, pushers and stop gates along a packaging conveyor line, with the reverse/check valve holding the circuit if upstream supply dips.
Start with the port step: this unit is 3/8 in NPT on the 400 size, and moving up or down a size changes both the connection and the flow path. Choose the drain to match maintenance access: automatic (as fitted here) drains itself, manual requires operator action, and differential-pressure is the default. The 40 um element is standard; specify the W code for 5 um where finer filtration is needed. The embedded square gauge is MPa-scaled here, with an external round gauge and psi or bar scales available as options. Threads can be ordered as G (BSPP) or NPT instead of the PT standard. Note that this is the low-pressure (L) regulator type; its exact adjustment range is not published, so ask us to confirm it against your setpoint. Flow is published as curves, not a single rating, so ask us to confirm sizing against the 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 this series as curves rather than a single rated figure, so we do not quote a number. Tell us your application and we will confirm the flow and sizing from the datasheet on request before you order.
The L code marks the low-pressure regulator variant, selected where the downstream setpoint sits below the standard type's range. The exact adjustment range for this variant is not published in the material we hold, so ask us to confirm it against your setpoint 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.