The AirTAC GFR400-10 AirTAC Filter Regulator, NPT3/8, 5 um, Auto Drain 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 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 GFR400-10 is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This size 400 unit is supplied with a 3/8 in NPT port, an automatic drain that expels collected condensate without manual attention, and 5 um filtration for cleaner air than the standard 40 um grade. The set pressure is adjusted across 0.15-0.9 MPa (20-130 psi), and the embedded square gauge reads in MPa so you can see and hold the working pressure. Maximum inlet pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C (non-freezing). The polycarbonate bowl suits the 400 size, and the mounting bracket is included.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of drain type, 40 um or 5 um filtration, gauge scale options and G or NPT thread variants. Flow is published as curves rather than a single rating, so ask us to confirm the flow and datasheet figures for your application before ordering.
| Model | GFR400-10 AirTAC Filter Regulator, NPT3/8, 5 um, Auto Drain |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (NPT thread) |
| Filtering grade | 5 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 | Automatic 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". |
| A | Drain: Automatic 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. |
| 1 | Gauge scale: MPa. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 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" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
Clean, regulated air feeding tool-clamp and actuation circuits on a machining centre, where the 5 um element helps protect directional valves and cylinders from water and fine particulate.
Pressure regulation for the pneumatic cylinders on a carton-forming and sealing line, with the automatic drain keeping condensate out of the supply without daily operator attention.
A point-of-use filter regulator on a plant air drop serving impact tools and air cylinders, giving technicians a visible, adjustable set pressure on the square MPa gauge.
Size 400 with a 3/8 in port sits in the middle of the GFR range: step up or down in size (200/300/400/600) to match the pipe and the flow your line needs. The automatic drain on this unit suits unattended or hard-to-reach installations; manual and differential-pressure drains are available if you prefer operator-controlled or pressure-differential draining. The 5 um element (code W) is the right choice where finer particulate matters; the standard grade is 40 um. The square gauge is fitted with an MPa scale (psi and bar scales exist as options), and an external round gauge is available. Thread is NPT here; G (BSPP) and PT are the other catalogue options. A mounting bracket is included.
Because filter-regulator flow is published as curves and not as a single rated figure, send us your application details and we will confirm the sizing against the datasheet before you order.
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 filter-regulator flow as performance curves rather than a single rated figure, so we do not quote a number here. Tell us your application and we will confirm the flow from the datasheet so you can size the unit correctly before ordering.
The automatic drain expels collected condensate from the bowl on its own, which suits unattended or hard-to-reach installations; manual and differential-pressure drain versions are available in the same series. The 5 um element (code W) filters more finely than the standard 40 um grade, which helps protect sensitive downstream components.
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.