The AirTAC GFR400-10 AirTAC Filter Regulator, PT3/8, 5 um, psi gauge 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 manual drain and regulates 0.05 - 0.9 MPa (7 - 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: one body removes water and particulate from compressed air and sets downstream pressure. This size 400 unit is ported PT3/8, carries a manual drain on its PC (polycarbonate) bowl, and is fitted with a 5 um filter element - the finer of the two available grades. Its regulator is the low-pressure type, and an embedded square gauge scaled in psi is included so the set pressure can be read directly. A mounting bracket is supplied.
This is a genuine AirTAC part. The GFR series covers sizes 200, 300, 400 and 600 with ports from 1/8 to 1 inch, PT, G or NPT threads, differential-pressure, automatic or manual drains, 40 um or 5 um elements, and MPa, psi or bar gauge scales. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. Flow is published as curves rather than a single rating, so ask us to confirm the figures from the datasheet for your application.
| Model | GFR400-10 AirTAC Filter Regulator, PT3/8, 5 um, psi gauge |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (PT thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 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 | Manual drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, 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". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 130 psi)). |
| L | Low-pressure 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. |
| 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) |
On a finishing line, the low-pressure regulator holds a gentle, stable supply to paint spray guns while the 5 um element keeps water and particles out of the gun and the finish. The psi gauge lets the booth operator read the setting at a glance.
Feeding cylinders and grippers on a carton-packing conveyor, this unit filters the shop air and sets the pressure the actuators see. The manual drain suits a plant that already stops the line on a fixed maintenance schedule.
On a lab bench supplied from a compressed-air ring main, the low-pressure type regulates down to the modest pressures bench apparatus needs, and the square psi gauge gives a direct reading without extra instruments.
Step up or down through the GFR sizes (200/300/400/600) to match the port and flow path your line needs; this 400 size sits at PT3/8. Choose the drain to suit maintenance: manual (as here) means an operator drains the bowl at intervals, while automatic and differential-pressure drains handle it without attention. Pick the 5 um element when downstream equipment needs finer filtration than the 40 um standard. Gauge scale (MPa, psi or bar) and thread (PT standard, G or NPT to order) are decodable choices, and a bracket is included.
One honest note on sizing: flow for this series is published as curves, not a single rated figure, and the low-pressure regulator's exact adjustment range is not published here. Ask us to confirm both 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 flow for this series as curves rather than a single rated figure, so there is no one l/min or SCFM number we can honestly quote. Tell us your application and we will confirm the relevant figures from the datasheet on request before you order.
The M in this code means condensate collected in the PC bowl is released by operating the drain by hand at intervals you set. If you would rather not rely on someone doing that, the same size is available with an automatic drain (code A) or the differential-pressure default, and the regulator adjustment range differs by drain type, so it is worth deciding before ordering.
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.