The AirTAC GFR300C08MLC1WTK AirTAC Filter Regulator NPT1/4 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.
GFR300C08MLC1WTK is an AirTAC GFR300 filter regulator, combining water and particulate filtration with pressure regulation in a single body. This configuration is built around a 1/4 in NPT port, a 5 um filter element (code W), a manual drain (code M) and the low-pressure regulator type (code L). It is fitted with a round MPa pressure gauge and a reverse/check valve (code K), includes a mounting bracket, and has a metal bowl. Maximum inlet pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part from the GFR300 size within the 200/300/400/600 range, each available in a wide spread of port sizes, drain types, filter grades, gauge styles and thread options. The regulation range of the low-pressure type is not published, and flow is given as curves rather than a single rating, so we confirm the datasheet figures for your application on request.
| Model | GFR300C08MLC1WTK AirTAC Filter Regulator NPT1/4 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. |
|---|---|
| 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) |
Filtered, regulated air to swing clamps and fixtures on a milling or turning cell: the 5 um element protects seal surfaces while the low-pressure regulator holds the clamp pressure the fixture was designed for.
Air preparation for spray guns and coating heads that run below standard line pressure. The manual drain lets an operator release accumulated condensate as part of a start-of-shift or end-of-shift routine.
Supply air for pneumatic positioners and small actuators on a process skid. The reverse/check valve holds downstream pressure if the supply line is vented or interrupted.
The real choices on this series are the size and port step (200/300/400/600, matched to the flow your line needs), the drain type (differential-pressure, automatic or manual - this unit is manual), the filter grade (40 um standard or 5 um with W), the gauge (embedded square as standard or external round, in MPa, psi or bar scales), the thread (PT standard, with G and NPT as order options) and the bracket. This unit also adds the low-pressure regulator type and a reverse/check valve.
Because flow is published as curves rather than a single rated figure, ask us to confirm sizing against your application - including the low-pressure regulation range - before ordering.
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. Send us your application details and we will confirm the flow curve and the low-pressure regulation range from the datasheet before you order.
The M code means condensate collected in the bowl is released by hand rather than automatically. It suits installations where an operator already walks the line and can drain the bowl as part of a routine check.
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.