The AirTAC GFR300C08LJF3WTK AirTAC Filter Regulator NPT1/4 5 um 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 GFR300C08LJF3WTK is a genuine AirTAC GFR300 filter regulator: water and particulate filtration plus pressure regulation combined in a single body, with no lubricator. This configuration is decoded as a 1/4 in NPT port, a 5 um filter element (the W grade, finer than the 40 um standard), a differential-pressure drain, the low-pressure regulator type, an embedded square gauge with bar scale, a built-in reverse (check) valve, and no mounting bracket. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. The bowl on this unit is metal.
This is a genuine AirTAC part from the GFR filter-regulator family, which is published in sizes 200, 300, 400 and 600 with a choice of port sizes, PT, G or NPT threads, drain types, filter grades, gauge scales and bracket options. Flow is published by AirTAC as curves rather than a single rated figure, so we confirm the datasheet and flow figures for your application on request.
| Model | GFR300C08LJF3WTK AirTAC Filter Regulator NPT1/4 5 um |
|---|---|
| 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) |
On a carton-sealing or wrapping line, the low-pressure regulator type lets you run the film-tension and flap-fold cylinders at a gentler setting than the main header, while the 5 um element keeps fine debris out of the small actuator valves.
A bench press or clamping fixture fed from a shared shop header needs its own filtered, regulated drop: this unit filters the supply to 5 um, holds the clamp pressure steady with the check valve holding upstream, and shows the setting on the bar-scale gauge.
A paint booth supply line benefits from fine particulate removal before the air reaches spray equipment; the 5 um element and differential-pressure drain knock out water and dirt from the header supply, with the low-pressure type matching the lower operating pressure of spray-air circuits.
Choose the size and port step against the air consumption of the circuit: this unit is size 300 with a 1/4 in NPT port, and the GFR range steps up through 200, 400 and 600 for larger ports and higher flow. Drain type is a real choice: differential-pressure (as decoded here), automatic (code A) or manual (code M). Filter grade is 40 um standard or 5 um with the W code - this unit carries the finer 5 um element. Gauge scale is selectable (MPa, psi or bar; this one is bar, square embedded type, with an external round gauge available as an option), and thread can be ordered as PT (standard), G (BSPP) or NPT. Note that this is the low-pressure regulator type (code L) and carries no mounting bracket (code J); brackets are optional on the family.
One honest routing note: AirTAC publishes flow for this family as curves, not as a single rated number, so please ask us to confirm sizing from the datasheet against your application 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 GFR family as curves rather than a single rated figure, so there is no one rated flow number we can quote. Tell us your application and we will confirm the flow figures from the datasheet on request before you order.
W is the filter-grade code for the 5 um element. The standard GFR element is 40 um; the 5 um grade removes finer particulate for circuits with sensitive downstream components. This unit is factory-fitted with the 5 um element, and the differential-pressure drain handles the collected water automatically as the pressure differential across the element builds.
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.