The AirTAC GFR400-10 AirTAC Filter Regulator, NPT3/8, 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 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 size 400 filter regulator: a single body that removes water and particulate from compressed air and regulates downstream pressure, in one unit. This configuration is fitted with a 5 um filter element (the finer of the two catalogue grades), an automatic drain that expels collected condensate without manual attention, a round pressure gauge reading in bar, a reverse/check valve that holds downstream pressure when the upstream supply is lost, and NPT 3/8 in ports. Maximum inlet pressure is 1.0 MPa (145 psi), the standard regulation range is 0.15-0.9 MPa (20-130 psi), and the operating temperature range is -5 to 70 C (non-freezing). The polycarbonate bowl suits this size; only the 600 size uses an aluminium alloy bowl.
This is a genuine AirTAC part. The GFR series is published in sizes 200, 300, 400 and 600, with port sizes from 1/8 in to 1 in, a choice of automatic, manual or differential-pressure drain, 40 um standard or 5 um fine filtration, embedded square or external round gauges with MPa, psi or bar scales, and PT (standard), G or NPT threads. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GFR400-10 AirTAC Filter Regulator, NPT3/8, 5 um |
|---|---|
| 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 — round, bar 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". |
| 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. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 3 | Gauge scale: bar. 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. |
| 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" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
Feeds a workshop pneumatic press or clamping fixture: the 5 um element protects the cylinder and valve seals from particulate and water, the regulator sets a stable working pressure below shop supply, and the check valve holds the set pressure if the main supply drops mid-cycle.
Conditions the air feeding a cartoning or wrapping machine's actuator bank: filtered and regulated air at a fixed bar setting keeps sealing cylinders and grippers repeating consistently, while the automatic drain carries off condensate on a line that runs unattended through shifts.
Serves as the point-of-use unit on a bench drop feeding air tools and screwdriver feeders: the regulator lets each station run its own pressure independent of the header, the 5 um grade keeps fine pneumatic components clean, and the round bar gauge gives the operator a clear reading.
Size 400 with 3/8 in NPT ports sits in the upper-middle of the GFR range; step up to size 600 for larger ports and higher flow, or down to 300/200 where demand is lighter - match the size step to the air consumption of the downstream circuit, and we will confirm the flow curve against your figures on request. The 5 um element in this model is the right choice where finer particulate matters (instrument air, painting, precision valves); the 40 um standard grade suits general plant air. The automatic drain suits unattended or hard-to-reach installations; choose manual drain where you want deliberate control, or differential-pressure drain as the default. The round bar gauge is the external style; an embedded square gauge with MPa, psi or bar scale is also available. NPT is the thread on this code; PT (standard) and G are order options, and the J code means no mounting bracket is supplied - add the bracket option if you panel-mount.
Flow for this series is published as curves, not a single rated number, so we do not quote a rated flow figure. Send us your required flow and pressure and we will confirm sizing from the AirTAC 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 curves rather than a single rated figure, so we do not state a rated flow number. Send us your required flow and working pressure and we will confirm the sizing from the datasheet on request before you order.
The A in the code GFR40010AJC3WTK selects the automatic drain, which expels collected condensate by itself instead of waiting for a manual bleed - useful on unattended lines. The W selects the 5 um filter element, the finer of the two grades (40 um is standard). Both are catalogue options on the GFR series, and this code also carries a round bar gauge, a reverse/check valve and NPT 3/8 in ports.
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.