The AirTAC GFR30015ALNWTK AirTAC Filter Regulator NPT1/2 Low-Pressure is a genuine G-series filter regulator: water separation, 5 µm particulate filtration and balanced-type pressure regulation combined in a single body. It has PT1/2" ports, a automatic 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 GFR30015ALNWTK is a size-300 filter regulator: water and particulate filtration plus pressure regulation combined in a single body. This configuration is built with a 1/2 in NPT port, an automatic drain that expels collected condensate without manual attention, a fine 5 um filter element (the tighter alternative to the standard 40 um grade), and the low-pressure regulator type for circuits that run below standard line pressures. A reverse/check valve is fitted, a mounting bracket is included, and no gauge is supplied - a gauge can be added as an option if your set-up needs one. The polycarbonate bowl suits non-freezing compressed-air service from -5 to 70 C, with a maximum inlet pressure of 1.0 MPa (145 psi).
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, a choice of differential-pressure, automatic or manual drains, 40 um or 5 um filtration, gauge and scale options, PT, G or NPT threads, and low-pressure or standard regulator types. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GFR30015ALNWTK AirTAC Filter Regulator NPT1/2 Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (NPT thread) |
| Filtering grade | 5 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 | Automatic 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". |
| A | Drain: Automatic 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. |
| W | Filtering grade 5 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" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
On a stamping or assembly cell with pneumatic clamps, this unit filters water and chips out of the supply at 5 um and holds a low regulated pressure to the clamp cylinders, with the automatic drain keeping condensate off the floor of an unattended bay.
Feeding seal bars, diverters and vacuum generators on a packaging line, the 1/2 in NPT port serves the machine's main drop, the 5 um element protects sensitive pilot valves, and the check valve holds the circuit if supply pressure dips.
Where a plant runs dedicated low-pressure headers for looms, coating heads or actuated dampers, the low-pressure regulator type matches the circuit instead of throttling a standard regulator far down its range, while filtration keeps moisture and particulate out of the process air.
Start with the port step: this unit is size 300 with a 1/2 in NPT port. If your line's air consumption sits near the top of what a 1/2 in port can serve, step up to size 400; if the demand is light, size 200 or 300 in a smaller port avoids overspending. Choose the drain to match access: automatic drain (this unit) suits installations that are not checked daily; manual drain suits attended stations; differential-pressure drain is the default where a drop across the element can trigger the purge. This unit carries the 5 um element - choose that over the standard 40 um when downstream valves, cylinders or instruments need finer protection. The low-pressure regulator type is selected for circuits running below standard regulated pressures; the exact adjustment range for the low-pressure type is not published, so confirm it with us. No gauge is fitted - add one with an MPa, psi or bar scale if you need a visible setpoint. Thread is NPT here; PT is the catalogue standard and G (BSPP) is also orderable. A bracket is included.
One honest note on sizing: AirTAC publishes flow for this family as curves, not as a single rated number, so we cannot quote you a rated flow figure. Send us your application details and we will confirm the datasheet and the right 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 the GFR family as performance curves rather than a single rated figure, so we do not quote a rated flow, Cv or SCFM number for this unit. Tell us your line pressure, regulated setpoint and the air demand of the equipment you are feeding, and we will confirm the datasheet and check the size against your application before you order.
This model is ordered with gauge code N, so no gauge is fitted - the regulator setpoint is set by the adjustment knob without a visual readout. If you want to see the downstream pressure, the GFR family accepts a gauge option with an embedded square gauge or an external round gauge, in MPa, psi or bar scale. Contact us and we will identify the gauge-equipped variant that matches this port and configuration.
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.