The AirTAC GFR40015LF2K AirTAC Filter Regulator PT1/2 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 GFR40015LF2K is a filter regulator: one body that removes water and particulate from compressed air and then regulates downstream pressure. This configuration is the size 400 unit with a 1/2 in PT port, built as the low-pressure type for circuits that hold a lower set pressure than a standard unit. It carries the standard 40 um filter element, a differential-pressure drain that bleeds collected condensate only when a set pressure differential is reached, an embedded square gauge scaled in psi, and a reverse/check valve fitted to hold downstream pressure if the supply drops. A mounting bracket is included.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, and options across drain type, 5 um filtration (code W), gauge scale, thread form (PT standard, G and NPT to order) and bracket choice. Flow figures are published as curves rather than a single rating, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GFR40015LF2K AirTAC Filter Regulator PT1/2 Low-Pressure |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (PT 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 — 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". |
| (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). |
| 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. |
| (blank) | PT 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) |
A CNC fixture line that clamps with air cylinders at a low, stable set pressure. The GFR40015LF2K filters the shop air, regulates the clamp circuit at its low set point, and the check valve holds clamp pressure if the main supply dips mid-cycle.
A carton-sealing or case-packing conveyor with air-driven flap and pusher actuators running on 1/2 in supply piping. The 40 um element keeps water and debris out of the actuators while the low-pressure regulator holds the gentle setting those actuators need.
A drop from the mill's main air ring main feeding a weaving or spinning machine section. The differential-pressure drain handles condensate on continuous duty, the psi gauge gives operators a readable set point, and the bracket fixes the unit to the machine frame.
Start with the size and port: the 400 series with a 1/2 in PT port suits lines whose flow demand sits above the 300 series step; match the port step to your pipe and required flow, not to the machine label alone. Drain choice matters here: the fitted differential-pressure drain suits steady-running lines, while an automatic drain (code A) suits unattended duty and a manual drain (code M) suits intermittent use where an operator drains the bowl. Filtration is the standard 40 um element; choose the 5 um W option only where downstream valves or cylinders demand finer air. The square gauge here reads in psi; MPa and bar scales are available, and an external round gauge is optional. Thread is PT as standard, with G (BSPP) and NPT as order options, and the bracket is included.
One honest note before you order: AirTAC publishes flow as curves, not as a single rated figure, and the exact regulation range of this low-pressure type is not stated as a single number either. Ask us to confirm the datasheet figures against your application before ordering.
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 GFR400 series as curves, not as a single rated number, so we do not quote a figure here. Send us your application details and we will confirm the datasheet flow curve and the low-pressure regulation range against your demand before you order.
The L in the code makes this the low-pressure regulator variant, intended for circuits held at a lower set pressure than the standard type; its exact range is not published as a single figure, so we confirm it on request. The drain is differential-pressure type: it ejects collected condensate automatically only when the pressure differential across it reaches its threshold, which suits continuously running lines.
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.