The AirTAC GFR40015LNTK 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 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 GFR40015LNTK is an AirTAC GFR400-series filter regulator: one body that removes water and particulate from compressed air and then regulates downstream pressure. This unit is built on the size-400 frame with 1/2 in NPT ports, uses the standard 40 um filter element, and drains condensate by the differential-pressure principle, so no manual draining routine is required for it to work. It is the low-pressure (L) type, intended for circuits that run below standard line pressure; its exact adjustment range is not published in the material we hold, so we confirm it on request. A reverse/check valve (K) is fitted to hold downstream pressure, no gauge is supplied (code N), and 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. The polycarbonate bowl suits the 400 size; only the 600 size uses an aluminium alloy bowl.
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 for thread type (PT standard, G and NPT to order), drain type (differential-pressure, automatic or manual), a 5 um element (code W), gauge styles and scales, and a reverse/check valve. Flow for this series is published as curves rather than a single rated figure, so ask us and we will confirm the datasheet and sizing figures for your application before you order.
| Model | GFR40015LNTK AirTAC 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 | Not fitted |
| 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. |
| N | No pressure gauge (N). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 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) |
Feeds filtered, regulated air to carton-sealing and case-erector cylinders that run below standard plant pressure, with the check valve holding the set pressure if the upstream supply dips.
Provides clean, particulate-free air at a gentle, stable low pressure for bench-top test rigs and pilot-scale apparatus where standard regulators overshoot the working band.
Supplies the 1/2 in drop feeding conveyor-mounted air nozzles and small actuators, filtering water and debris out before the low-pressure circuit and protecting the downstream components.
Start with the port and size step: this unit is size 400 with 1/2 in NPT ports, one step up from the 300 series, and the right choice depends on the air demand of the circuit rather than on a single rated number - flow for the GFR series is published as curves, so send us your demand and we will confirm the fit against the datasheet before ordering. The 40 um element is the standard grade; if the application needs finer filtration, the 5 um element is available as code W. Drain is differential-pressure here; automatic (A) and manual (M) drains are the other catalogue choices if your maintenance routine prefers them. Note that this is the low-pressure (L) type with no gauge fitted (N): if you need a local pressure indication, gauge options exist elsewhere in the series, and the exact low-pressure adjustment range is confirmed on request. Thread is NPT on this unit; PT is the standard thread and G (BSPP) is the other order option. A mounting bracket is included.
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.
We do not quote a single rated flow figure for this unit, because AirTAC publishes flow for the GFR series as curves rather than one number, and we will not estimate one. Send us your air demand and line conditions and we will confirm the sizing against the datasheet on request before you order.
The L in the code marks the low-pressure regulator version, intended for circuits running below standard line pressure; its exact adjustment range is not published in the material we hold, so we confirm it on request. The N means no gauge is supplied, so you will need downstream indication from another device if the process requires it. Everything else decodes normally: 1/2 in NPT ports, 40 um element, differential-pressure drain, check valve fitted, bracket included.
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.