The AirTAC GFR300C15ALNWTK AirTAC Filter Regulator NPT1/2 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 See datasheet 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 GFR300C15ALNWTK is a filter regulator: it removes water and particulate from compressed air and holds downstream pressure in a single body. This GFR300 configuration is built with a 1/2 in NPT port, a 5 um filter element (code W), an automatic drain, and the low-pressure regulator type. A reverse/check valve is fitted, no gauge is supplied, and a mounting bracket is included.
It is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with a choice of PT, G or NPT threads, differential-pressure, automatic or manual drains, and 40 um or 5 um elements; the size-300 bowl is polycarbonate (only the 600 size uses aluminium alloy). 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 figures from the datasheet for your application.
| Model | GFR300C15ALNWTK AirTAC Filter Regulator NPT1/2 |
|---|---|
| Series | GFR300 filter regulator |
| Port size | See datasheet (PT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Standard 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 — factory standard, Factory standard scale |
| Reflux valve | Not fitted |
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. Standard type, regulating 0.15 - 0.9 MPa (20 - 130 psi). 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. |
|---|---|
| C1 | Port size See datasheet. 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)). |
| (blank) | Standard type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| (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. |
| (blank) | PT thread. PT is the default; G is BSPP and T is NPT. |
| (blank) | No reverse-flow valve (the default). |
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 · See datasheet · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-C1 (two-unit set) |
Feeding clean, regulated air to welder clamps and robot gripper valves on an automotive weld line, where the 5 um element helps protect solenoid valves from scale and the automatic drain clears collected water without an operator stopping the cell.
Conditioning the air feeding carton-sealing and case-packing cylinders, with the regulator holding a steady low-pressure setting so sealing jaws act consistently through the shift.
Filtering and regulating shop air ahead of a plasma cutter's torch circuit, where moisture and particles in compressed air cause erratic arc starting and premature consumable wear.
Within the GFR range you step up through sizes 200, 300, 400 and 600, each with larger ports (1/8 in to 1 in) to match the flow your line needs; this unit sits at size 300 with a 1/2 in NPT port. Drain choice is differential-pressure (standard), automatic (fitted here) or manual; filter grade is 40 um standard or 5 um with the W code, as fitted here. The low-pressure regulator type suits circuits that run below standard line pressures - we can confirm its adjustment range on request. Threads are PT as standard with G and NPT as order options, and a bracket is included. Because flow is published as curves rather than one rated figure, send us your application details and we will confirm sizing against the datasheet before you order.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. Without the K option, air cannot flow back through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR series as curves rather than a single rated figure, so we do not quote one number. Send us your line pressure and required downstream flow and we will confirm the sizing from the datasheet on request.
No. The N in the code means no gauge is fitted. The GFR family offers an embedded square gauge or an optional external round gauge with MPa, psi or bar scales, so choose a variant with the gauge code if you need a readout. The adjustment range of this low-pressure type can also be confirmed 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.