The AirTAC GFR400-15MF3T AirTAC Filter Regulator NPT1/2 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 PT1/2" 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 GFR400-15MF3T is a size 400 filter regulator that removes water and particulate from compressed air and sets downstream pressure in a single body. This configuration carries a 1/2 in NPT port, a manual drain bowl in polycarbonate, a standard 40 um filter element, and an embedded square pressure gauge scaled in bar. The manual drain means an operator opens the bowl drain to expel collected condensate, which suits installations visited on a regular maintenance round. Maximum inlet pressure is 1.0 MPa (145 psi) and the regulator adjusts from 0.05 to 0.9 MPa (7-130 psi). Operating temperature is -5 to 70 C, non-freezing.
This is a genuine AirTAC part from the GFR filter-regulator line, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, PT as standard thread and G or NPT as order options, plus automatic, manual or differential-pressure drains, 40 um or 5 um elements, and gauge scale choices. Flow for this series is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR400-15MF3T AirTAC Filter Regulator NPT1/2 Manual Drain |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (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 — square, 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. |
|---|---|
| 15 | Port size PT1/2". 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). |
| F | Gauge shape: Square. 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 · PT1/2" · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
Installed at the drop feeding a CNC machining cell, the unit strips water and swarf-carrying particulate from the main header and holds a set pressure for clamps, chucks and tool-change actuators, with the bar gauge giving the setter a local reading.
Mounted ahead of the cylinder bank on a carton-forming and sealing conveyor, the filter regulator delivers cleaned air at a stable setting so case erectors and pushers stroke consistently through the shift, with condensate drained at the daily check.
Fitted on the supply to a laboratory automation or sample-handling skid, the unit protects solenoid valves and small actuators from moisture and dirt while the regulator holds the low, repeatable pressure those devices need, read directly off the square gauge.
Size 400 with a 1/2 in port sits in the upper half of the GFR range, so step up or down a size if your line's air demand points to a different port. Drain choice matters: manual suits attended installations, while automatic or differential-pressure drains suit points that are not visited often. The 40 um element is the standard grade for general plant air; specify code W for 5 um where finer protection is needed. The fitted square gauge reads in bar; MPa, psi and bar scales are available, and an external round gauge is optional. PT is the standard thread and G or NPT is ordered as a variant - this unit is the NPT version. A mounting bracket is included.
Because flow for the GFR series is published as curves and not a single rated figure, we do not quote a flow number here. Send us your application's air demand and we will confirm sizing against the datasheet curves before you order.
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 performance curves rather than a single rated figure, so we do not state a flow number, Cv or SCFM value. Tell us your application's air demand and we will confirm the sizing against the datasheet curves on request before you order.
The M in the code specifies a manual drain: an operator opens the bowl drain to release collected condensate, which suits points visited on a routine maintenance round. The GFR series also offers an automatic drain (code A) and a differential-pressure drain (blank) for less frequently attended installations, and the bowl on this size 400 unit is polycarbonate.
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.