The AirTAC GFR400C10ALF2K AirTAC Filter Regulator PT3/8 Low-Pressure 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.
GFR400C10ALF2K is an AirTAC GFR400 filter regulator: water and particulate filtration plus pressure regulation combined in a single body. This configuration takes a 3/8 in PT port, drains the bowl automatically, filters to the standard 40 um grade, and regulates with the low-pressure type regulator. It comes with the embedded square gauge reading in psi, a reverse/check valve fitted, and a mounting bracket included. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. On this size the bowl is polycarbonate (PC), giving a clear view of the condensate level.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and options across drain types, 5 um (code W) filtration, gauge scales in MPa, psi or bar, and G (BSPP) or NPT threads in place of the PT standard. Flow for the GFR400 is published as curves rather than a single rated figure, so we confirm datasheet and sizing figures on request.
| Model | GFR400C10ALF2K AirTAC Filter Regulator PT3/8 Low-Pressure |
|---|---|
| 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 low-pressure atomizing air to spray guns in a finishing booth, where the automatic drain keeps condensed water out of the coating air and the low-pressure regulator holds a gentle, stable setting at the gun.
Regulating hold-down clamps on a CNC fixture that work at reduced pressure, with the 40 um element protecting the clamp cylinders from scale and pipe debris and the check valve holding the setting if supply dips.
Supplying regulated air to sealing jaws on a bagging conveyor, where the low-pressure setting suits delicate film sealing and the automatic drain clears condensate between shifts without operator attention.
Size 400 with a 3/8 in PT port sits in the middle of the GFR flow ladder (200/300/400/600); step a size up or down if your demand sits near the edge of the curve. This unit has an automatic drain, so the bowl clears condensate without a manual routine; manual and differential-pressure drains are the alternatives in the family. The 40 um element is standard, with 5 um (W) available where finer filtration is needed. The embedded square gauge reads in psi, with MPa and bar scales as options and an external round gauge available. Thread is PT as standard; G (BSPP) and NPT are order options. Bracket included. Flow 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. 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 GFR400 as curves rather than a single rated figure, so we do not quote one number. Send us your line pressure and the downstream flow your application needs, and we will confirm sizing from the datasheet before you order.
This unit carries the L code, so it is the low-pressure type, intended for settings below the standard regulator range. The exact adjustment window for GFR400 low-pressure units is not a single published figure, so tell us your target setpoint and we will confirm suitability 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.