The AirTAC GFR400-10 AirTAC Filter Regulator 3/8 in PT, 5 um 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 GFR400-10 is a filter regulator: water and particulate removal plus downstream pressure regulation combined in a single body, sized 400 with PT3/8 ports. This configuration is the low-pressure type, so the regulator is intended for circuits that run below standard line pressure; the exact adjustment window for the low-pressure type is not published, so confirm it against your setpoint before ordering. It carries the 5 um filter element (code W) for finer filtration than the 40 um standard, a differential-pressure drain that bleeds collected condensate automatically as flow passes through, a round external gauge reading in psi, and a mounting bracket is included. The polycarbonate bowl suits this 400 size; max 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 ports from 1/8 to 1 in, and each size can be ordered with a different drain type, filter grade, gauge style and scale, thread form (PT standard, G or NPT to order) and bracket choice. Flow is published as curves rather than a single rated figure, so ask us to confirm flow and datasheet values for your application before ordering.
| Model | GFR400-10 AirTAC Filter Regulator 3/8 in PT, 5 um |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (PT 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, psi 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. 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. |
| 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. |
| (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 · PT3/8" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
Fixture clamps and swing cylinders that hold parts at reduced line pressure get clean, regulated air from one compact unit: 5 um filtration protects seal surfaces while the low-pressure regulator holds the holding force the fixture was designed around.
On a cartoning or wrapping line, a bank of small actuators and air jets needs filtered, settled air at a steady reduced pressure. This 3/8 in unit feeds the manifold, the differential-pressure drain keeps condensate moving out during production, and the psi gauge gives operators a visible setpoint.
Bench test rigs and pilot-scale process panels running at low pressure need particulate- and water-free air at a stable setpoint. The 5 um element shields sensitive instruments, and the round psi gauge lets technicians verify supply at a glance.
Size up by port step: 200, 300, 400 and 600 cover 1/8 in through 1 in, and the right step depends on the air demand of the circuit rather than the pipe you happen to have. Because flow is published as curves and not as a single rating, ask us to confirm sizing against your application before ordering. Drain choice is real: differential-pressure (this unit, automatic in service), fully automatic, or manual for a controlled blowdown. Filter grade is 40 um standard or 5 um with the W code - this unit already carries the 5 um element. Gauge options are the embedded square gauge or the external round gauge, with MPa, psi or bar scales; this unit has a round psi gauge. Thread is PT as standard with G (BSPP) and NPT available to order, and a bracket is included on this unit.
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 performance curves rather than a single rated figure, so we do not quote a number. Send us your application details and we will confirm the flow and full datasheet figures for this exact model on request.
The L in GFR40010LC2W marks the low-pressure regulator type, intended for circuits running below standard line pressure. The exact adjustment range for the low-pressure type is not published in the material we hold, so confirm it against your setpoint with us before ordering. The adjustment range for standard-type GFR units is 0.15-0.9 MPa with this differential-pressure drain.
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.