The AirTAC GFR400C15AF1TK AirTAC Filter Regulator NPT1/2, Auto 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 See datasheet ports, a differential-pressure drain and regulates 0.15 - 0.9 MPa (20 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The AirTAC GFR400C15AF1TK is a size 400 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one body. This configuration is fitted with a 1/2 in NPT port, an automatic drain that expels collected condensate without manual attention, a 40 um standard filter element, an embedded square gauge scaled in MPa, and a reverse/check valve that holds downstream pressure if the upstream supply drops. Maximum working (inlet) pressure is 1.0 MPa (145 psi), the standard regulator adjustment range with automatic drain is 0.15-0.9 MPa (20-130 psi), and the operating temperature range is -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with a choice of ports, PT/G/NPT threads, differential-pressure, automatic or manual drains, a 5 um (code W) optional filter grade, gauge scale options, and an optional reverse/check valve. Flow is published as curves rather than a single rated figure, so we confirm the datasheet and flow figures for your application on request.
| Model | GFR400C15AF1TK AirTAC Filter Regulator NPT1/2, Auto Drain |
|---|---|
| Series | GFR400 filter regulator |
| Port size | See datasheet (PT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 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 | Differential-pressure drain |
| Bowl material | PC |
| Pressure gauge | Fitted — factory standard, Factory standard 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 0.15 - 0.9 MPa (20 - 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. |
|---|---|
| C1 | Port size See datasheet. This body offers 10 = PT3/8", 15 = PT1/2". |
| (blank) | Drain: Differential-pressure drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 130 psi)). |
| (blank) | Standard type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| (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. |
| (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 · See datasheet · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-C1 (two-unit set) |
Feeding a pneumatic press or clamping fixture on an assembly line: the 40 um element keeps wear particles out of the cylinder valves, the regulator holds a steady setting for consistent clamp force, and the check valve holds the circuit if plant air dips.
Supplying sorters, diverters and carton-closing cylinders on a packaging conveyor: automatic drain handles condensate on a line that runs unattended across shifts, and the MPa gauge lets technicians set and verify the header pressure at the machine.
A half-inch drop feeding a CNC machining cell or similar machine tool: the filter-regulator cleans and sets the air at the point of use, the 1/2 in NPT port matches standard drop piping, and the included bracket mounts the unit to the machine frame.
Start with the size and port: the 400 size with a 1/2 in NPT port is the right step when your line flow and piping are at the half-inch level - match the published flow curve to your demand rather than guessing. Choose the drain to suit access: automatic (this unit) suits installations that are hard to reach or run unattended, manual suits attended stations, and the differential-pressure default drains on load change. The 40 um element is standard; specify 5 um (code W) only where finer particulate protection is genuinely needed. The embedded square gauge is scaled in MPa here; psi and bar scales and an external round gauge are options. NPT is ordered as the thread option (PT is the catalogue standard; G/BSPP is also available), the bracket is included, and the K code adds the reverse/check valve. Because flow is published as curves rather than 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 G-series flow as curves rather than a single rated figure, so we do not quote one number. Send us your line pressure, downstream pressure setting and air demand, and we will confirm the flow figures from the datasheet for this exact model before you order.
The A code fits an automatic drain, which expels collected condensate from the bowl without anyone opening it - the right choice for units mounted high, in enclosed cabinets, or on lines that run unattended. Manual and differential-pressure drain versions of the same GFR400 size are available if you prefer to drain at the machine during changeovers.
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.