The AirTAC GFR300C08LJF1WT AirTAC Filter Regulator 1/4 in NPT 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 GFR300C08LJF1WT is an AirTAC GFR300 filter regulator: it removes water and particulate from compressed air and holds downstream pressure steady, in one body. This configuration has 1/4 in NPT ports, the 5 um filter element (code W, finer than the 40 um standard), a differential-pressure drain on the metal bowl, and the low-pressure regulator type. An embedded square gauge scaled in MPa is fitted so the outlet setting can be read directly. No mounting bracket is included and no reverse/check valve is fitted.
This is a genuine AirTAC part in the GFR300 size, one of four body sizes (200, 300, 400 and 600) that step up in port and flow capacity. Across the GFR family you can order manual or automatic drains instead of the differential-pressure drain, the 40 um standard element, gauge scales in psi or bar, and G (BSPP) or NPT threads in place of the PT standard, plus a mounting bracket. Rated flow is published as curves rather than a single figure, so ask us to confirm the datasheet for your application.
| Model | GFR300C08LJF1WT AirTAC Filter Regulator 1/4 in NPT |
|---|---|
| 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 fixture where clamp cylinders must close gently and hold at a set pressure, this unit filters the shop air to 5 um and lets the operator set and read the low clamping pressure on the fitted MPa gauge.
Sealing heads, diverters and pilot valves on a packaging line need clean air and a steady supply pressure; the 5 um element protects the pilot valves while the regulator holds the line pressure the machine was set up for.
A test bench running instruments or small actuators at reduced pressure benefits from the low-pressure regulator type: fine filtration ahead of the devices and a direct MPa gauge reading for repeatable setups.
Choose the size by port and demand: this unit is size 300 with 1/4 in NPT ports; step down to 200 or up to 400 and 600 as your line requirement changes - we can check the flow curves against your air consumption before you order. The 5 um element on this code suits air feeding sensitive valves and instruments; the 40 um standard grade is the usual choice for general cylinder circuits. Drain options are differential-pressure (this code), automatic or manual. The fitted square gauge reads in MPa, with psi and bar scales available as alternatives. Thread is NPT on this code - PT is the AirTAC standard and G (BSPP) is also offered - and a mounting bracket can be added, since this unit is supplied without one.
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 rather than a single rated figure, so we do not quote a number here. Send us your working pressure and air consumption and we will confirm from the datasheet whether this 1/4 in NPT unit is correctly sized for the job.
It marks the low-pressure regulator type. The exact setting range for the low-pressure type is not published in our data, so please confirm it with us before ordering if your circuit runs at reduced pressure. The fitted square gauge reads the outlet setting in MPa.
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.