The AirTAC AirTAC GFR400-15T Filter Regulator NPT1/2 Low-Pressure 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 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 GFR400-15T is a filter regulator: water-and-particulate filtration and pressure regulation combined in a single body, so one unit cleans the compressed air and holds downstream pressure in the same footprint. This configuration is a size 400 unit on a 1/2 in NPT port (PT is the standard thread for the family; G and NPT are order options, and this code specifies NPT). The PC bowl carries the differential-pressure drain, the element is the standard 40 um grade, and the regulator is the low-pressure type - confirm the exact adjustment range with us before you set a circuit. A round gauge on a psi scale is fitted, a reverse/check valve is built in, and the mounting bracket is included. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR family is published in sizes 200, 300, 400 and 600, with a choice of port, thread (PT, G or NPT), drain type (differential-pressure, automatic or manual), filter grade (40 um standard, 5 um optional) and gauge scale (MPa, psi or bar); only the 600 size uses an aluminium alloy bowl, while 200-400 use PC. AirTAC publishes flow for this family as curves rather than a single rated figure, so send us your application details and we will confirm the flow and full datasheet figures on request.
| Model | AirTAC GFR400-15T Filter Regulator NPT1/2 Low-Pressure |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (NPT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Low-pressure 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 — round, psi scale |
| Reflux valve | Fitted (reverse flow permitted) |
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. The low-pressure type adjusts over a lower band than standard; we confirm the exact figures from the factory datasheet. 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". |
| (blank) | Drain: Differential-pressure drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 130 psi)). |
| L | Low-pressure 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. |
| 2 | Gauge scale: psi. 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. |
| K | Reverse-flow (reflux) valve fitted. |
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) |
Filtering and regulating the air to the clamping cylinders on a pneumatic press fixture, where the low-pressure regulator type suits a circuit set at modest pressure and the reverse/check valve is already built into this unit.
Air prep for the valve island feeding sealing bars and pick-and-place actuators on a packaging conveyor, keeping water and particles out of the directional valves upstream of a 1/2 in supply drop.
A regulated drop on a laboratory compressed-air ring main, where the round psi gauge gives a readable local setting for bench-top equipment and the 40 um element protects downstream fittings.
The real choices in this family are the size and port step, the drain type, the filter grade, the gauge and its scale, the thread and the bracket. Step up through sizes 200, 300, 400 and 600 as your port and air demand grow - this code is size 400 on 1/2 in. Drain options are the differential-pressure default (this code), automatic (A) for hands-off condensate removal, or manual (M); the filter grade is 40 um standard or 5 um (W) for finer protection. Gauges come as the embedded square type or an external round gauge, on MPa, psi or bar scales - this code carries a round psi gauge. Thread is PT as standard with G and NPT as order options (NPT here), and the bracket is included unless J is specified.
One honest note on sizing: AirTAC publishes flow for the GFR family as curves, not a single rated number, so we cannot quote a figure here. Tell us your line pressure and downstream demand and we will confirm the sizing against the curves before you order.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR family as curves rather than a single rated figure, so there is no one number we can quote. Send us your upstream pressure and downstream demand and we will read the sizing off the datasheet curves and confirm it on request.
This code has no drain letter, so it takes the family default: a differential-pressure drain on the PC bowl. Automatic (A) and manual (M) drains are order options on the same size if you would rather have hands-off or fully manual condensate removal.
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.