The AirTAC GFR40015MLF2TK 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 GFR40015MLF2TK is an AirTAC GFR400 filter regulator: water and particulate filtration plus pressure regulation combined in a single body, sized 400 with a 1/2 in NPT port. This configuration is the low-pressure type, so it suits circuits that hold a lower working pressure than a standard unit is set up for. It drains by hand via the manual drain on the PC (polycarbonate) bowl, filters to the 40 um standard grade, carries a reverse/check valve (code K), and is fitted with the embedded square gauge scaled in psi. A 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 spans sizes 200, 300, 400 and 600, with port options from 1/8 in to 1 in, PT as the standard thread and G or NPT as order options, a choice of differential-pressure, automatic or manual drain, a 5 um element (code W) where finer filtration is needed, gauge scale choices, and a reverse/check valve option. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| Model | GFR40015MLF2TK 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 — square, 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". |
| 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. |
| 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) |
Point-of-use conditioning on a cartoning or wrapping line: the 40 um element strips water and pipe scale from the shop-air drop, the regulator holds a steady low supply pressure to the machine's cylinders, and the psi gauge lets operators verify the setting at a glance.
Feeding hold-down clamps and diverters on a conveyor system, where the check valve holds the regulated circuit against upstream decay and the manual drain lets maintenance clear accumulated condensate during scheduled stops.
Supplying instrument air to a test bench or laboratory rig that runs at reduced pressure: the low-pressure regulator type, fine 40 um filtration and direct-reading psi gauge give technicians a clean, stable and visible air supply at the bench.
Step up or down through the GFR sizes (200/300/400/600) against the port and the flow your line needs; this unit is size 400 with a 1/2 in NPT port. Choose the drain to match maintenance practice: manual (as here) for controlled, on-demand draining, automatic or differential-pressure where the bowl should clear itself. The 40 um element is the standard grade; specify the 5 um W option if downstream equipment needs finer filtration. As a low-pressure type, this unit is selected when the regulated pressure sits below what a standard regulator is intended for - ask us to confirm the adjustment range against your set pressure. The embedded square gauge reads in psi; MPa and bar scales and an external round gauge are alternatives. PT is the standard thread, with G and NPT as catalogue options, and a bracket is included.
One honest note on sizing: flow for this family is published as curves, not a single rated figure, so we do not quote a number here. Send us your application details and we will confirm the datasheet and sizing 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, not as a single rated figure, so we do not quote a number here. Tell us your application and we will confirm the datasheet and check the sizing against your required flow before you order.
The M in the code selects the manual drain: condensate in the PC bowl is released by hand, which suits installations drained on a fixed maintenance schedule. The L selects the low-pressure regulator type, intended for circuits held at lower working pressures; because the exact adjustment range for this type is not published in the material we hold, we confirm it against your set pressure on request.
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.