The AirTAC GFR400-10 AirTAC Filter Regulator 3/8in NPT, 40 um Filter 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 size 400 filter regulator that cleans compressed air and holds downstream pressure in one body. It removes water and particulate through a 40 um element, drains condensate automatically via the differential-pressure drain, and regulates outlet pressure from 0.15 to 0.9 MPa (20-130 psi). The embedded square gauge reads in MPa, the polycarbonate bowl suits this 3/8 in NPT port size, and no mounting bracket is fitted on this configuration.
This is a genuine AirTAC part from the GFR400 series. The GFR line spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, manual or automatic drain options, a 5 um filter grade, and alternative gauge scales and thread types. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| Model | GFR400-10 AirTAC Filter Regulator 3/8in NPT, 40 um Filter |
|---|---|
| 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 | 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, MPa 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. |
|---|---|
| 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. |
| J | Supplied without bracket. |
| (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. |
| (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" · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
Feeding clean, regulated air to the tool-change and clamping circuits of a machining centre, where a 3/8 in supply line serves multiple actuators from one drop.
Regulating pressure to conveyor stopper and pusher cylinders on a packaging line while the 40 um element keeps pipe scale and condensate out of the valves.
Conditioning the air at a bench or assembly-station drop in a factory, giving operators a set, stable pressure for air tools and small pneumatic fixtures.
Size 400 with a 3/8 in port sits in the upper-middle of the GFR range; step up or down by port size to match the flow your line needs. This unit uses the differential-pressure drain (default), with automatic (A) and manual (M) versions available, and the standard 40 um element - choose the W code for the 5 um grade where finer filtration is required. The square MPa gauge is fitted; external round gauges and psi or bar scales are options, and G or NPT threads are ordered as variants. No bracket is fitted on this code; a bracket can be added. Because flow is published only as curves, 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 GFR flow as curves in the catalogue rather than a single rated figure, so we do not quote one number. Tell us your line pressure and the flow your application needs and we will confirm the sizing from the datasheet before you order.
This unit uses the default differential-pressure drain, which discharges condensate when the pressure differential across the filter rises. Automatic (code A) and manual (code M) drain versions are available in the same size if your installation suits them better.
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.