The AirTAC GFR400-15 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 GFR400-15 is an AirTAC GFR-series filter regulator: it removes water and particulate from compressed air and holds a regulated downstream pressure in a single body. This size 400 unit carries a 1/2 in NPT port, a polycarbonate bowl with manual drain, a standard regulator adjustable from 0.05 to 0.9 MPa (7-130 psi), and the standard 40 um filter element. No gauge is fitted (code N), so order a gauge separately if you need a visual pressure readout. Maximum inlet pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part from the GFR400 series. Across the G-series line, sizes 200, 300, 400 and 600 step up in port size and flow, with filter grades of 40 um standard or 5 um (code W), a choice of differential-pressure, automatic or manual drains, and PT, G or NPT threads to order. Flow for this unit is published as curves rather than a single rated figure, so ask us to confirm the datasheet and check sizing for your application.
| Model | GFR400-15 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 | Not fitted |
| 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. |
| N | No pressure gauge (N). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 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 ahead of the solenoid valves and cylinders on a CNC machining centre, cleaning the shop air and holding a steady regulated pressure for clamping and tool-change actuators.
Mounted at the air drop on a packaging conveyor line, supplying filtered, regulated air to diverters, grippers and stopper cylinders along the line.
Used at point-of-use in an assembly cell where a filter regulator feeds air tools and pneumatic presses, with the manual drain emptied during routine shift checks.
Choose the size by port and required flow: size 400 with a 1/2 in port sits in the upper mid-range of the G-series, one step above the 300 and below the 600. Drain type is a real choice here: this unit has a manual drain (code M), emptied by hand, which suits installations that are accessible and checked routinely; automatic or differential-pressure drain versions suit unattended installations. Filter grade is the standard 40 um element, with the finer 5 um grade (code W) available where downstream valves need cleaner air. No gauge is fitted, so select a gauge and scale (MPa, psi or bar) if you need a readout. Thread is NPT on this unit; PT is the standard and G/NPT are order options. A mounting bracket is included. Flow is published as curves, not a single rating, so 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 GFR400 series as curves rather than a single rated figure, so we do not quote a number. Ask us to confirm the datasheet and check the curve against your required flow before you order.
The code M means the bowl is emptied by hand, which suits installations that are checked routinely; automatic and differential-pressure drain versions are available for unattended use. The code N means no gauge is fitted - a gauge with an MPa, psi or bar scale can be ordered if you need a pressure readout.
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.