The AirTAC GFR300C08LNT 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 GFR300C08LNT is a GFR-series filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one body. This configuration is built on the 300 size with 1/4 in NPT ports (PT is the AirTAC standard thread; G and NPT are order options), a 40 um standard filtration element, and a differential-pressure drain, the catalogue default drain type. The regulator is the low-pressure (L) type, no gauge is fitted (code N), and a mounting bracket is included. Maximum inlet pressure is 1.0 MPa (145 psi), the working temperature range is -5 to 70 C (non-freezing), and the 300-size bowl is polycarbonate (PC) - only the 600 size uses an aluminium alloy bowl.
This is a genuine AirTAC part. The GFR family spans the 200, 300, 400 and 600 sizes with ports from 1/8 to 1 in, and options across the family include automatic or manual drains, a 5 um element (code W), embedded square or external round gauges with MPa, psi or bar scales, and a reverse/check valve. Flow is published as curves rather than a single rating, so ask us to confirm sizing and any datasheet figure against your application before ordering.
| Model | GFR300C08LNT 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 and stepping down shop air to a pneumatic clamp fixture on a CNC cell, where the low-pressure regulator type holds a gentler clamping force and the 40 um element keeps sludge and scale out of the clamp cylinders.
Feeding cleaned, regulated air to the cylinders and air jets of a carton-sealing or case-packing machine, with the differential-pressure drain clearing collected water through the shift and the bracket fixing the unit to the machine frame.
Supplying filtered, regulated pilot air to pneumatically actuated process valves on a low-pressure utility line, where the low-pressure type regulator and 1/4 in NPT ports suit compact pilot circuits.
The real choices on this family are all decodable from the code. Step up or down a size (200/300/400/600) to match the port and the flow your line needs - this unit is the 300 size with 1/4 in NPT ports. Choose the drain: differential-pressure (this unit, the default), automatic (A) for hands-off condensate handling, or manual (M) where you want control over draining. Choose the element: 40 um standard or 5 um (W) for finer protection downstream. Gauges are optional - no gauge is fitted here (code N) - and can be an embedded square or external round gauge with MPa, psi or bar scales. Thread is NPT on this unit; PT is the AirTAC standard and G (BSPP) is also available to order. A bracket is included; the J code deletes it. Flow is published as curves, not a single rating, so send us your flow and pressure requirements and we will confirm the right size from 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 there is no one l/min or SCFM number we can quote. Send us your required flow and inlet/outlet pressures and we will read the GFR300 curve and confirm sizing from the datasheet on request.
It is the catalogue default drain type for this family. Automatic (A) and manual (M) drains are order options if you prefer scheduled or hands-off condensate handling - tell us which you want and we will confirm the right code before you order.
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.