The AirTAC GFR400-10 AirTAC Filter Regulator 3/8 in, 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 GFR400-10 is an AirTAC GFR400-series filter regulator: one body that removes water and particulate from compressed air and then regulates downstream pressure. This 400-size unit is fitted with a PT 3/8 in port, a 5 um filter element (the finer of the two catalogue grades), a manual drain for emptying the bowl, and an external round gauge reading in psi. It is the low-pressure type, intended where working pressures sit below the standard regulator band. Maximum inlet pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C, non-freezing; the polycarbonate bowl lets you see the condensate level at a glance.
This is a genuine AirTAC part. The G-series filter-regulator line spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, a choice of 40 um or 5 um filtration, manual, automatic or differential-pressure drains, square or round gauges with MPa, psi or bar scales, and PT, G or NPT threads. Because AirTAC publishes flow only as curves rather than a single rated figure, we confirm the datasheet and sizing figures for your application on request.
| Model | GFR400-10 AirTAC Filter Regulator 3/8 in, 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 — round, 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. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. 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 process lines where diaphragm or pinch valves are stroked at reduced air pressure, the low-pressure GFR400-10 cleans the supply through its 5 um element and holds a gentle set pressure, with the psi gauge giving operators a direct local reading.
Fitted ahead of carton-formers and case-sealer cylinders on a packaging line, this unit strips water and fine particles from the shop air and regulates it for the machine's control circuit, while the manual drain serves scheduled end-of-shift maintenance.
On a test bench or lab rig where instruments and small actuators need clean, low-pressure air, the 5 um filtration protects sensitive components and the round psi gauge supports repeatable set-point checks between runs.
Start with port size: this unit steps up to 3/8 in on the 400 body, the right choice when your line's air demand sits above what a 1/4 in unit carries comfortably - match the size step to your flow need rather than oversizing on guesswork. The 5 um element (code W) suits downstream equipment sensitive to finer particles; the standard grade is 40 um if your application tolerates it. The manual drain means an operator opens the drain to expel collected condensate - choose automatic or differential-pressure drain codes if the unit will be hard to reach. The fitted round gauge reads in psi; square embedded gauges and MPa or bar scales are the alternatives. Thread here is PT (the standard); G and NPT are order options. No mounting bracket is included with this code. For sizing, flow is published as curves, not a single rating - ask us to confirm the figures 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 we do not quote a number here. Tell us your application and we will confirm the flow and sizing data from the datasheet on request before you order.
The M in the code specifies a manual drain: condensate collected in the polycarbonate bowl is released by opening the drain by hand, which suits units mounted where an operator passes regularly. The L code marks the low-pressure regulator type, intended for set pressures below the standard band; its exact adjustment range is not published on the sheet we work from, so we confirm it on request.
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.