The AirTAC GFR400-10 AirTAC Filter Regulator, NPT3/8, Manual Drain 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 size 400 filter regulator that removes water and particulate from compressed air and sets downstream pressure in a single body. This configuration has a 3/8 in NPT port, a polycarbonate bowl with manual drain, a standard 40 um filter element, and a round pressure gauge reading in bar. With manual drainage, an operator drains accumulated condensate as part of routine checks rather than relying on an automatic or differential-pressure mechanism.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port options from 1/8 in to 1 in, a choice of manual, automatic or differential-pressure drains, 40 um or 5 um (W) filter grades, square or round gauges with MPa, psi or bar scales, and G, NPT or PT threads. Flow is published as curves rather than a single rated figure, so we confirm the datasheet and sizing figures on request.
| Model | GFR400-10 AirTAC Filter Regulator, NPT3/8, Manual Drain |
|---|---|
| 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 | 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 | Manual drain |
| Bowl material | PC |
| Pressure gauge | Fitted — round, bar 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 0.05 - 0.9 MPa (7 - 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". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 130 psi)). |
| (blank) | Standard type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (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. |
| (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) |
Installed ahead of a pneumatic press station to strip water and swarf from the shop air line and hold a set working pressure for consistent cylinder stroke force.
Mounted on the air drop feeding a cartoning or wrapping conveyor, delivering cleaned, pressure-controlled air to the machine's actuator valves and grippers.
Used at a plant-air takeoff point where a manual-drain filter regulator keeps downstream tooling circuits supplied with dry air at a stable, operator-set pressure.
Start with the port step: this unit is size 400 with a 3/8 in NPT port, and moving up or down a size changes both the port and the flow capacity, so match the size to the air demand of the circuit. Choose the drain type to suit access: manual drain (this unit) suits locations with regular maintenance visits, automatic drain suits unattended installations, and differential-pressure drain is the catalogue default. Filter grade is 40 um standard or 5 um with the W code if finer filtration is needed. Gauge options are the embedded square gauge or an external round gauge, with MPa, psi or bar scales - this unit carries a round gauge reading in bar. Thread is PT as standard, with G (BSPP) and NPT as order options; this unit is specified in NPT. A mounting bracket is included.
Because flow is published as curves and not as a single rated number, 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 the GFR series as characteristic curves rather than a single rated figure, so we do not quote one number. Tell us your application and required flow, and we will confirm the sizing from the datasheet on request before you order.
The M in the code GFR40010MC3T specifies a manual drain on the polycarbonate bowl. Condensate collected by the 40 um filter stage is released by an operator opening the drain during routine checks, rather than discharging automatically. If the installation is unattended, ask us about the automatic or differential-pressure drain variants of the same size.
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.