The AirTAC GFR400-10 AirTAC Filter Regulator NPT3/8 Low-Pressure 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 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: it removes water and particulate from compressed air and regulates downstream pressure in a single 400-size body with a 3/8 in NPT port. This configuration carries a manual drain bowl in PC (polycarbonate), a 40 um standard filter element, a low-pressure regulator type, and a fitted embedded square gauge scaled in MPa. No reverse/check valve is fitted and no mounting bracket is included with this code.
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, drain choices (differential-pressure, automatic or manual), an optional 5 um element (code W), and optional external round gauges with MPa, psi or bar scales. Flow is published as curves rather than a single rating, so we confirm flow and datasheet figures on request.
| Model | GFR400-10 AirTAC Filter Regulator NPT3/8 Low-Pressure |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (NPT thread) |
| Filtering grade | 40 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, 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. 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). |
| 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) |
Feeds filtered, regulated air to the sealing and forming cylinders of a packaging line that runs at reduced setpoints, with the manual drain emptied during shift changeover.
Sits ahead of a workholding clamp circuit on a machining cell, letting the setter dial a low clamping pressure while the 40 um element keeps scale and pipe debris out of the valve stack.
Mounted at the machine inlet of a spinning or weaving line, conditioning the plant air supply and holding a gentle regulated pressure for thread-tension jets and low-pressure actuators.
Step up or down the size ladder (200/300/400/600) to match the port and flow path your line needs; this 400 size takes a 3/8 in port in NPT thread, with PT standard and G (BSPP) available as order options. Choose the drain to suit attendance: manual (this code) needs someone to open the bowl, automatic drains unattended, and differential-pressure drains on a pressure drop. Filter grade is 40 um standard here; specify W for the 5 um element where finer particulate removal matters. The gauge on this unit is the embedded square type scaled in MPa; an external round gauge in MPa, psi or bar scale is optional. This is the low-pressure regulator type - its exact adjustment range is not published, so ask us to confirm it against your setpoint before ordering. No bracket is included with this code; a bracket can be added. Because flow is published as curves, not a single rating, 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 flow for this family as curves, not as a single rated figure, so we do not quote a number. Send us your application details and we will confirm the flow from the datasheet on request before you order.
The M in the code selects a manual drain: condensate collects in the PC bowl and is released by hand, which suits attended installations. The L selects the low-pressure regulator type, intended for reduced setpoints; its exact adjustment range is not published, so ask us to confirm it for your setpoint.
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.