The AirTAC GFR400-15MLC1T AirTAC 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 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 GFR400-15MLC1T is a filter regulator: one body that removes water and particulate from compressed air and regulates downstream pressure. This size 400 unit has a 1/2 in NPT port, a polycarbonate bowl with manual drain, the standard 40 um filter element, and a round pressure gauge with an MPa scale. It is the low-pressure type, intended for circuits that run at a reduced downstream pressure. 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 GFR series, which spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in and PT, G (BSPP) or NPT threads. Drain type, filter grade (40 um standard, 5 um optional with the W code) and gauge style vary by code. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet figures for your application.
| Model | GFR400-15MLC1T AirTAC Filter Regulator NPT1/2 Low-Pressure |
|---|---|
| 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 | 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 | Manual drain |
| Bowl material | PC |
| Pressure gauge | Fitted — round, MPa 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. 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". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 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. |
| 1 | Gauge scale: MPa. 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) |
On a CNC machining cell, the unit filters the shop-air supply and holds a reduced, stable pressure to pneumatic clamps that must not over-grip delicate workpieces. The round MPa gauge gives the setter a direct local reading, and the manual drain is bled at shift start to clear accumulated water.
On a carton-sealing conveyor, the unit conditions air for low-pressure actuator circuits driving hold-down pads and product diverters, while the 40 um element keeps pipe scale and wear particles out of the directional valves downstream.
In a water-treatment plant, the unit supplies filtered, reduced-pressure air to pilot actuators on large process valves. The round MPa gauge lets operators verify the pilot set pressure at a glance during rounds, and the manual drain is bled during scheduled maintenance.
Size 400 with a 1/2 in port suits installations where larger supply piping is already in place; step down to size 200 or 300 for smaller circuits. The M code here means a manual drain: condensate must be bled by hand, so choose an automatic (A) or differential-pressure drain code if the unit will be hard to reach. The 40 um element is the standard grade; the W code gives 5 um where finer filtration is needed. Thread is NPT on this model; PT and G are order options, and a mounting bracket is included. As a low-pressure type, its adjustment range differs from the standard GFR range - tell us the set pressure you need and we will confirm it against the catalogue. Because flow is published as curves rather than a single rating, send us your flow and pressure requirements and we will confirm sizing 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 curves rather than a single rated figure, so we do not quote a number here. Send us your required flow and working pressure and we will confirm the datasheet curve for this model before you order.
The M code on this model specifies a manual drain: condensate collected in the polycarbonate bowl must be bled by hand. If the unit will be mounted where regular access is difficult, ask about GFR400-15 variants with an automatic (A) or differential-pressure drain - same body, different drain 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.