The AirTAC GFR400-10 AirTAC Filter Regulator PT3/8, 40 um, psi Gauge 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 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: it removes water and particulate from compressed air and sets downstream pressure in a single body. This 400-size unit is specified with a PT3/8 (3/8 in) port, a 40 um standard filtration element, and a differential-pressure drain that bleeds accumulated condensate automatically whenever the pressure differential across the element rises. The regulator is the standard type with an adjustment range of 0.15-0.9 MPa (20-130 psi), and the embedded square gauge fitted here reads in psi so operators can set and monitor downstream pressure directly. The K option adds a reverse/check valve, which holds the set pressure downstream if the upstream supply is interrupted.
This is a genuine AirTAC part from the GFR series, which spans sizes 200, 300, 400 and 600 with port options from 1/8 in to 1 in, thread choices of PT (standard), G and NPT, drain types, 40 um or 5 um (W) filtration, and gauge scales in MPa, psi or bar. Rated flow for this model is published as a curve rather than a single figure, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GFR400-10 AirTAC Filter Regulator PT3/8, 40 um, psi Gauge |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (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 — square, psi 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. 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. |
|---|---|
| 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)). |
| (blank) | Standard 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. |
| 2 | Gauge scale: psi. 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. |
| 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 filtered, pressure-regulated air to the pneumatic tool changers and clamping circuits of a CNC machining centre, with the check valve holding the clamp setting if shop supply dips.
Conditions the air feeding the cylinders and grippers on a carton-forming and sealing line, keeping condensate and particles out of the valve island while holding a stable set pressure.
Serves as the conditioning stage in a control panel supplying air to pilot regulators and I/P devices, with the psi square gauge giving the panel a readable set point at the wall.
Choose the GFR size by the port step and the flow your line needs: this 400-size unit carries a 3/8 in PT port, one step up from the 300 series. The 40 um element is the standard grade and suits general plant air; specify the W code if you need 5 um protection for sensitive downstream equipment. The differential-pressure drain on this unit discharges condensate automatically with the pressure differential, so no manual draining routine is required; automatic (A) and manual (M) drains are available on other configurations. The square gauge here reads in psi; MPa and bar scales are alternatives. PT is the standard thread, with G (BSPP) and NPT as orderable options, and the mounting bracket is included.
Because AirTAC publishes flow as curves rather than a single rated figure, we do not quote a flow number here. Send us your application details and we will confirm sizing against the datasheet before you order.
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 performance curves rather than a single rated figure, so we do not state a flow number here. Tell us your application and required flow, and we will confirm the datasheet curve and correct sizing for you before you order.
K means a reverse (check) valve is fitted. It holds the regulated pressure downstream if the upstream supply is lost or dropped, which protects circuits such as clamps or grippers that must not vent unexpectedly. Units without the K code have no check valve.
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.