The AirTAC GFR300C15MLF2K AirTAC Filter Regulator PT1/2, 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 GFR300C15MLF2K is a filter regulator: it removes water and particulate from compressed air and reduces the downstream pressure to a set working level in a single body. This size 300 unit is threaded PT1/2 (1/2 in), carries the standard 40 um filter element, and is built on the low-pressure regulator variant of the GFR family. It has a manual-drain metal bowl, an embedded square gauge reading in psi, a reverse/check valve fitted, and a mounting bracket included. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, PT thread as standard and G (BSPP) or NPT to order, with manual, automatic or differential-pressure drains, 40 um or 5 um (W) filtration, gauge and scale choices, and a reverse/check valve option. Flow is published as curves rather than a single rating, so ask us to confirm sizing and datasheet figures for your application before ordering.
| Model | GFR300C15MLF2K AirTAC Filter Regulator PT1/2, 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) |
On a packaging line where delicate actuators and sealing elements run on a reduced air supply, this unit filters water and particulate out of the shop air and holds the circuit at the pressure the machine was set up for, with the psi gauge giving the operator a direct reading at the panel.
Diverter gates and pusher cylinders along a conveyor line need clean, steady air to shift reliably shift after shift. Placed at the drop feeding the gate valves, this unit strips condensate and debris and regulates the supply, while the manual drain suits a line that is walked and checked each shift.
At a plant maintenance bench where impact wrenches, ratchets and blow guns share one drop, this unit cleans the incoming air and lets the technician set a fixed working pressure for the task at hand, with the bracket mounting it neatly behind the bench and the check valve holding the setting against backflow.
The real choices on this family are the size and port step, the drain, the filter grade, the gauge and the thread. Size 300 with a PT1/2 port suits lines plumbed at 1/2 in; step up or down a size when the port or the air demand changes. The 40 um element fitted here is the standard grade; the 5 um (W) element is the option when finer particulate capture is needed. This unit has a manual drain, so the bowl is emptied by hand, which suits installations that are visited routinely; choose the automatic (A) or differential-pressure (blank) drain code when the unit is hard to reach. The embedded square gauge reads psi; MPa and bar scales and an external round gauge are alternatives. PT thread is standard and G (BSPP) or NPT can be ordered. Note that this is the low-pressure regulator variant and its exact adjustment range is not published, so confirm it with us. Flow is published as curves, not a single rating, so send us your flow requirement 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.
Flow for the GFR series is published as curves, not as a single rated figure, so we do not quote a number on the page. Tell us your port size and the flow your application needs, and we will confirm the sizing against the AirTAC datasheet on request before you order.
The M in the code GFR300C15MLF2K means a manual drain: the bowl is emptied by hand, which suits installations that are visited routinely. If the unit will sit somewhere hard to reach, the same size is available with an automatic drain (code A) or a differential-pressure drain (blank) instead.
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.