The AirTAC GFR300C15MLC3TK 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 GFR300C15MLC3TK is an AirTAC GFR300 filter regulator, combining water and particulate filtration with pressure regulation in a single body. This configuration has 1/2 in NPT ports, the low-pressure regulator type, a manual drain, the standard 40 um filter element, a round pressure gauge with a bar scale fitted, a reverse (check) valve, an included mounting bracket and a metal bowl. 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 made in sizes 200, 300, 400 and 600, with port sizes from 1/8 to 1 in, and catalogue options covering drain type, 5 um filtration (code W), gauge style and scale, thread type and bracket choice. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet and sizing figures for your application.
| Model | GFR300C15MLC3TK 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 glue heads and low-pressure actuators on a packaging machine, where the low-pressure regulator type suits circuits running below standard plant pressure and the 40 um element helps keep nozzles and valves clear of debris and water.
Mounted at the drop feeding air tools and small cylinders at an assembly cell, with the round bar-scale gauge giving operators a local pressure readout and the manual drain emptied as part of routine shift checks.
Conditioning the supply to solenoid valves and tool-change cylinders on a machining centre: the filter section removes water and particulate before the regulator, and the fitted reverse (check) valve prevents backflow in the drop line.
Size and port set the air capacity: this unit is size 300 with 1/2 in NPT ports, and the same family steps through sizes 200, 300, 400 and 600 so you can match the port to the flow your line needs. The drain here is manual, meaning the bowl is emptied by hand; automatic and differential-pressure drains are the other catalogue choices if you want unattended operation. Filtration is the standard 40 um element, with a finer 5 um element (code W) available. The gauge fitted is the external round type with a bar scale; an embedded square gauge and MPa or psi scales are the alternative options. Thread is NPT on this unit; PT is the standard and G (BSPP) is orderable, all as specification. A bracket is included and a reverse (check) valve is fitted. The regulator is the low-pressure type; its exact adjustment range is not published in the general table, so we confirm it on request. Because flow is published as curves rather than a single 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 a number here. Tell us your working pressure and air demand and we will confirm the sizing from the datasheet on request.
The M in the code sets a manual drain: the bowl is emptied by hand, which suits lines with regular operator checks. If you prefer unattended drainage, the same size 300 filter regulator can be ordered with an automatic or differential-pressure drain - just tell us when ordering.
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.