The AirTAC GFR400C15MLF3WTK AirTAC Filter Regulator 1/2 NPT 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 GFR400C15MLF3WTK is an AirTAC GFR400 filter regulator: a single body that removes water and particulate from compressed air and then regulates downstream pressure. This configuration is built on the size 400 frame with a 1/2 in NPT port, a 5 um filter element (the finer of the two published grades), a manual drain for controlled, operator-checked water removal, and a metal bowl. Regulation is the low-pressure type, and a square gauge scaled in bar is fitted so the set-point can be read directly at the unit. A reverse/check valve is fitted and the mounting bracket is included.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, and options across drain type, filter grade, gauge scale, thread (PT standard, with G and NPT as order options) and reverse/check valve. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. Rated flow is published as curves rather than a single figure, so ask us to confirm flow and any other datasheet figure against your application before ordering.
| Model | GFR400C15MLF3WTK AirTAC Filter Regulator 1/2 NPT |
|---|---|
| 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) |
Filtered, regulated air for the clamping cylinders on a stamping press: the 5 um element keeps directional valves clean, the low-pressure regulator holds a stable downstream set-point, and the manual drain lets maintenance bleed accumulated water during shift checks.
Air preparation for grippers and diverters on a bottling conveyor: filtration removes condensate and particles ahead of the gripper valves, regulation keeps actuation pressure steady along the line, and the bar-scale gauge gives operators a visible set-point at the unit.
Conditioning the air feed to spray guns in a paint booth: the 5 um grade catches fine particulate that would spoil finish quality, the regulator holds gun pressure steady between passes, and the metal bowl with manual drain suits a supervised end-of-day drainage routine.
Choose the size by port and flow duty: this unit is size 400 with a 1/2 in NPT port, and because flow is published as curves rather than a single rating, send us your air demand and we will confirm the fit before you order. The drain is manual here, which suits installations where an operator can bleed the bowl on a routine; automatic and differential-pressure drains are available on the same frame if the unit will run unattended. The element is 5 um (code W) against the 40 um standard, so pick this grade where finer filtration matters. The fitted square gauge reads in bar; psi and MPa scales, and an external round gauge, are alternatives. Thread is NPT on this unit - PT is the catalogue standard and G (BSPP) is also an order option - and the mounting bracket is included. The regulator is the low-pressure type; its exact range is not published in our sheet, so confirm your set-point window with us 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 a number here. Tell us your line pressure and air demand and we will confirm the flow from the datasheet for this exact model before you order.
This unit is ordered with a manual drain (code M): water collected in the metal bowl is released by an operator, which suits attended installations. If the unit will run unattended, the same GFR400 frame is available with an automatic or differential-pressure drain - just ask for the alternative code.
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.