The AirTAC GFR300C08LF3TK 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.
The AirTAC GFR series combines filtration and pressure regulation in a single body: air first passes a filter element that removes water and particulate, then flows through an integrated regulator, so one unit conditions the supply where separate filter and regulator units would otherwise be needed. This GFR300C08LF3TK is the size 300 unit with 1/4 in NPT ports (PT is the standard thread; G and NPT are order options), the low-pressure regulator type (code L), a 40 um standard filter element, the differential-pressure drain and a metal bowl. A square pressure gauge with bar scale is fitted, a reverse/check valve is included (code K), and a mounting bracket comes with the unit.
It is a genuine AirTAC part, available across the GFR200, GFR300, GFR400 and GFR600 sizes with ports from 1/8 in up to 1 in. Options across the range include the 5 um element (code W), automatic or manual drains, gauge scales in MPa, psi or bar, and the standard or low-pressure regulator type. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. Flow for this size is published as curves rather than a single rated figure, so ask us to confirm flow and any datasheet figure for your application on request.
| Model | GFR300C08LF3TK 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) |
Conditioning the branch that feeds pneumatic clamps and workholding fixtures on a machining cell, where the clamp circuit is run at a set pressure well below full line pressure and the regulator is trimmed at the fixture.
A filtered, regulated drop feeding cylinders and grippers along a packaging conveyor, with the 40 um element catching water and debris before they reach valve spools and cylinder seals.
Trimming a stable low-pressure supply on a laboratory or test-rig air panel, with the bar-scale square gauge mounted on the unit giving a direct readout at the set point.
Size the unit by port and flow: the GFR range steps through sizes 200, 300, 400 and 600, with larger sizes taking larger ports and more flow; this size 300 configuration is ported 1/4 in NPT. The decodable choices are the drain type (differential-pressure as here, automatic with code A, manual with code M), the filter element (40 um standard, 5 um with code W), the gauge (embedded square fitted here with a bar scale; an external round gauge is optional, with MPa, psi or bar scales), the thread (PT is the standard, G and NPT are order options) and the bracket. This is the L low-pressure regulator type; AirTAC does not publish a numeric adjustment range for it, so tell us the set pressure you need and we will confirm suitability on request. Flow is published as curves rather than a single rating, so ask us to confirm sizing against the datasheet 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 flow for the GFR300 size as curves rather than a single rated figure, so we do not quote a number here. Send us your port size, line pressure and flow demand, and we will confirm the flow and sizing from the datasheet on request before you order.
This is the L low-pressure variant of the GFR300, and AirTAC does not publish a numeric adjustment range for it on the standard sheet. Tell us the set pressure your circuit needs and we will confirm suitability from the datasheet on request.
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.