The AirTAC GFR300C15ALC3TK 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 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 GFR300C15ALC3TK is a size 300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is built with a 1/2 inch NPT port, an automatic drain that ejects collected condensate without manual attention, a 40 um standard filter element, a low-pressure regulator type, a fitted reverse/check valve, and an external round gauge reading in bar. A mounting bracket is included, and the maximum working (inlet) pressure is 1.0 MPa (145 psi) with an operating temperature of -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR range is published in sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, and with choices of drain type, 40 um or 5 um filtration, gauge style and scale, thread (PT standard, G or NPT to order) and low-pressure or standard regulator type. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing figures for your application on request.
| Model | GFR300C15ALC3TK AirTAC Filter Regulator NPT1/2 Low-Pressure |
|---|---|
| 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 the clamp and fold cylinders on a carton-forming line, where one body filters plant air of water and debris and holds a steady, lower regulated pressure so carton sealing stays repeatable through the shift. The automatic drain keeps the bowl clear without an operator stopping the machine.
Serving a bench of air-operated coating or test stations that need clean, moisture-stripped air at a modest regulated setting. The 40 um element handles general plant particulate, the reverse/check valve holds the downstream setting if supply dips, and the bar gauge gives operators a direct local reading.
Supplying the gate and diverter cylinders along a distribution conveyor, where the low-pressure regulator type matches circuits that run below standard plant pressure and the automatic drain copes with condensate carried over from a long compressed-air run.
Size 300 with a 1/2 inch port suits lines whose air demand sits in the middle of the G-series range; step up to size 400 or 600, or down to size 200, according to the flow your circuit needs. The automatic drain on this unit suits unattended or hard-to-reach installations; manual and differential-pressure drains are the alternatives if you prefer scheduled or load-linked drainage. The 40 um element is the standard grade for general plant air, with 5 um (code W) available where finer filtration is wanted. The fitted round gauge reads in bar; embedded square gauges with MPa, psi or bar scales are the catalogue alternative. PT is the standard thread and G or NPT are order options - this unit is specified with NPT. A bracket is included, and the low-pressure regulator type is intended where the circuit works below the standard regulator's range; ask us to confirm the exact adjustment window on request.
Because catalogue flow is published as curves rather than a single rating, 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 this series as curves, not as a single rated number, so there is no one l/min or SCFM figure we can honestly quote. Send us your line pressure, downstream demand and allowed pressure drop, and we will confirm the sizing from the datasheet on request before you order.
The A in the code specifies an automatic drain, which ejects collected condensate from the bowl without operator attention - useful on unattended or hard-to-reach installations. The catalogue also offers manual and differential-pressure drains on GFR units, so if you would rather drain on a schedule, ask us for the alternative code.
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.