The AirTAC GFR40015MLF2G AirTAC Filter Regulator G1/2 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 GFR40015MLF2G is a GFR-series filter regulator: one body that removes water and particulate from compressed air and then regulates downstream pressure. This size-400 unit carries a G1/2 (BSPP) port, the low-pressure regulator type, a manual drain on the 40 um filter bowl, and a fitted embedded square gauge scaled in psi. The polycarbonate bowl lets you see condensate at a glance, and the manual drain lets you empty it on a schedule you control. 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 spans sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, drain choices (differential-pressure, automatic or manual), a 5 um optional filter element, gauge scale options and G or NPT threads as order variants. The exact regulation range of the low-pressure type is not published in the standard table, and flow is published as curves rather than a single rating - ask us and we will confirm the datasheet figures for your application before you order.
| Model | GFR40015MLF2G AirTAC Filter Regulator G1/2 Low-Pressure |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (G (BSPP) 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 — square, psi 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). |
| F | Gauge shape: Square. 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. |
| G | G (BSPP) 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) |
Mounted ahead of directional valves on a stamping or clamping press, it filters condensed water and scale out of the plant air supply and gives the operator a psi gauge to hold the clamping pressure the tooling was set up for.
On a bottling or cartoning conveyor with air cylinders doing pick-and-place work, it conditions the supply and lets the line technician regulate actuator pressure from the square gauge without leaving the machine.
Installed at the air inlet of a machining centre or lathe, it removes water and particulate before the air reaches the tool changer and spindle air seal, with the low-pressure regulator holding the supply the machine builder specified.
Choose the size and port step against the air your line actually consumes: this unit is size 400 with a G1/2 port, one step up from GFR300-10 and below the size-600 aluminium-bowl units. Because flow is published as curves rather than a single rated figure, ask us to confirm sizing against your application before ordering. This configuration is already fixed on several real choices: manual drain (you drain the bowl yourself, which suits attended installations or positions where an auto drain would drip where you do not want it), the standard 40 um element (the 5 um W element is a separate variant), the low-pressure regulator type (its exact range is not published - confirm with us if your setpoint is low), and a square gauge scaled in psi. The G thread is the ordered variant; PT is the catalogue standard thread, and NPT is also available. A mounting bracket is included. If you need a check valve in the supply path, that is the K variant, not this code.
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 this family as curves, not as a single rated number, so we do not quote a figure here. Tell us your application and required flow and we will confirm the datasheet curve and correct sizing for you before you order.
The M in the code selects a manual drain on the filter bowl: condensate collects in the polycarbonate bowl and you drain it by hand on a schedule. If you would rather the bowl drain itself, the automatic-drain variant is a different code - we can quote it. The 40 um element fitted here is the standard grade; a 5 um element is available as the W variant.
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.