The AirTAC GFR300C15MLC3WTK AirTAC Filter Regulator NPT 1/2 in 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 GFR300C15MLC3WTK is an AirTAC GFR300 filter regulator: filtration and pressure regulation combined in one body, removing water and particulate from compressed air and setting downstream pressure. This configuration is the 300 size with a 1/2 in NPT port, the fine 5 um filter element (code W), a manual drain, the low-pressure regulator type, a round pressure gauge with bar scale, a reverse/check valve, and the mounting bracket included.
It is a genuine AirTAC part from the GFR filter-regulator family, which spans 200, 300, 400 and 600 sizes with ports from 1/8 in to 1 in, a choice of drain types, 40 um or 5 um filtration, gauge styles and scales, and PT, G or NPT threads. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing). We confirm flow and other datasheet figures on request, because AirTAC publishes flow as curves rather than a single rating.
| Model | GFR300C15MLC3WTK AirTAC Filter Regulator NPT 1/2 in |
|---|---|
| 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 fixture-clamping cylinders in a machining cell that runs below standard shop line pressure; the low-pressure regulator type suits circuits that never need full-range settings, while the 5 um element keeps directional valves and check valves clean.
Conditioning air for the cylinders and grippers at a case-sealing station on a packaging line: water and fines drop out in the bowl, station pressure is set once at the regulator, and the manual drain is bled during scheduled changeovers.
Point-of-use conditioning on a laboratory compressed-air ring feeding bench-top instruments and air-driven equipment, where the 5 um element and a bar-scale gauge give clean, readable supply pressure at each bench.
Size and port: the 300 frame with a 1/2 in NPT port sits mid-range in the GFR line; step down to 200 or up to 400/600 depending on the flow your circuit needs - ask us to check the published flow curves against your application before ordering, since flow is published as curves, not a single rated figure. This unit is the low-pressure regulator type (code L), so its adjustment range differs from the standard type and is not published here - confirm your set pressure with us first. Filtration is the fine 5 um element instead of the standard 40 um; the manual drain means the bowl is bled by hand on a routine, unlike the automatic or differential-pressure drain options. The round gauge reads in bar (embedded square gauges and MPa/psi scales are the alternatives), the thread is NPT (PT is the AirTAC standard; G/BSPP is also orderable), and the mounting bracket is included.
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 GFR300 flow as curves rather than a single rated figure, so we do not quote a number here. Send us your application details and we will confirm the flow and sizing from the datasheet on request.
This unit is the low-pressure regulator type (code L); its adjustment range differs from the standard GFR type and is not published in our listing, so confirm the set pressure you need with us before ordering. The drain is manual (code M): the bowl is bled by hand on a routine, whereas the automatic and differential-pressure drain options remove condensate without attention.
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.