The AirTAC GFR30015LNTK 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 AirTAC GFR30015LNTK is a 300-size filter regulator that removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is ordered in NPT1/2 (1/2 in) thread, with the standard 40 um filter element, a differential-pressure drain that bleeds collected condensate automatically as pressure differential builds, and a reverse/check valve fitted to hold downstream pressure against backflow. It is the low-pressure (L) type, intended for circuits that run well below standard line pressure. No gauge is fitted in this code (N), and a mounting bracket is included.
This is a genuine AirTAC part from the GFR filter-regulator family, which spans sizes 200, 300, 400 and 600 with port options from 1/8 in to 1 in and PT, G or NPT threads. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing). Flow is published as curves rather than a single rating, so ask us to confirm sizing or any datasheet figure against your application before ordering.
| Model | GFR30015LNTK AirTAC Filter Regulator NPT1/2 Low-Pressure |
|---|---|
| Series | GFR300 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.
| GFR300 | G-series filter regulator, 300 body — sets the port range. |
|---|---|
| 15 | Port size PT1/2". This body offers 08 = PT1/4", 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 | GFR300 · PT1/2" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
On a fixture-clamping circuit that must run at reduced pressure to protect delicate workpieces, this low-pressure-type filter regulator cleans the supply and holds the set pressure, with the check valve preventing backflow through the unit when the upstream side vents.
A packaging line section fed at 1/2 in NPT uses this unit to strip water and pipe scale from the plant air before it reaches cylinders and valves, while the differential-pressure drain handles condensate without operator intervention.
At a laboratory or pilot-plant air drop where instruments need a stable, cleaned supply at modest pressure, this filter regulator conditions the line and the fitted check valve keeps the regulated branch isolated from upstream fluctuation.
Choose the size and port step against the air demand of the circuit: this unit is size 300 with a 1/2 in NPT port, one step up in flow capacity from the 200/1/4 in class. The 40 um element is the standard grade for general-purpose air; a 5 um element (code W) is available if finer filtration is needed. Drain choice matters: this code uses the differential-pressure drain, which needs no daily attention, while automatic (A) and manual (M) drains are catalogue alternatives. The L suffix makes this the low-pressure regulator type - the exact adjustment range for this variant is not published, so confirm it with us. This code carries no gauge (N); gauge options with different scales exist in the family. Thread here is NPT (T); PT is the standard thread and G is the other order option. A bracket is included.
Sizing note: flow for GFR units is published as curves, not a single rated figure, so we do not quote a number here. Send us your application's flow and pressure requirements and we will confirm the correct size 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 GFR filter regulators as performance curves rather than a single rated figure, so we do not quote a number here. Tell us your required flow and working pressure and we will confirm against the datasheet curve whether the 300 size at 1/2 in NPT suits your application before you order.
The N in the code means no gauge is fitted with this unit; gauge options with different scales exist in the GFR family if you want one on a future order. The L makes this the low-pressure regulator type, intended for circuits running below standard line pressure - its exact adjustment range is not published, so confirm it with us. The K means a reverse/check valve is fitted.
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.