The AirTAC GFR300C08MLF3TK AirTAC Low-Pressure Filter Regulator NPT1/4 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 GFR300C08MLF3TK is an AirTAC GFR-series filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This 300-size unit is built with 1/4 in NPT ports, the low-pressure regulator type, a 40 um filter element and a manual drain on the metal bowl, so condensate is released by hand rather than automatically. An embedded square gauge with a bar scale is fitted, a reverse/check valve is included to block backflow toward the supply side, and the unit comes with a mounting bracket.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and options that include automatic or manual drains, a 5 um element (code W), gauge scales in MPa, psi or bar, and G (BSPP) or NPT threads in place of the PT standard. 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 sizing and the full datasheet for your application.
| Model | GFR300C08MLF3TK AirTAC Low-Pressure Filter Regulator NPT1/4 |
|---|---|
| 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. |
|---|---|
| C0 | 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-C0 (two-unit set) |
Regulates filtered air to a pneumatic clamping fixture on a machining centre that runs at reduced pressure, with the manual drain letting an operator bleed accumulated water from the bowl at the start of a shift.
Sits at the air drop of a small pneumatic assembly press, cleaning shop air to 40 um and holding a low set pressure while the square bar gauge gives the operator a local pressure reading.
Feeds a lab air bench or test station where the supply must be filtered and held at a low, stable pressure, with the fitted reverse/check valve blocking backflow if the upstream supply dips.
Choose the size by port and flow: this unit is size 300 with 1/4 in NPT ports; larger sizes (400, 600) carry bigger ports for more flow, and because flow is published as curves rather than a single rating, have us check the curve against your air demand before ordering. The remaining choices are already fixed in this code: manual drain (service by hand), 40 um standard filtration (5 um is available as code W), a square gauge reading in bar (MPa, psi and bar scales exist), NPT thread (PT is the AirTAC standard; G/BSPP and NPT are order options), a reverse/check valve, and a mounting bracket included. Note the L in the code: this is the low-pressure regulator type, and its exact adjustment range is not published in the material we hold - confirm your set pressure with us if it is critical to the circuit.
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, not as a single rated figure, so we do not quote a number here. Tell us your operating pressure and air demand and we will confirm the sizing from the datasheet on request.
It marks the low-pressure regulator type, a variant intended for circuits set below the standard range. The exact adjustment range is not published in the material we hold, so confirm your set pressure with us before ordering. Everything else in GFR300C08MLF3TK decodes as: size 300, 1/4 in NPT ports, manual drain, 40 um element, square gauge with bar scale, reverse/check valve fitted, and mounting bracket included.
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.