The AirTAC GFR30008LJF1WTK AirTAC Filter Regulator NPT1/4 5 um is a genuine G-series filter regulator: water separation, 5 µm particulate filtration and balanced-type pressure regulation combined in a single body. It has PT1/4" 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 GFR300 series combines water and particulate filtration with pressure regulation in a single body, so one 1/4 in (NPT) unit cleans the air and sets the downstream pressure in a single mounting position. This configuration carries the 5 um element (code W) for finer particle removal than the standard 40 um grade, a differential-pressure drain that bleeds accumulated condensate as the pressure differential rises, a low-pressure regulator type, an embedded square gauge scaled in MPa, and a built-in reverse (check) valve that holds the downstream circuit when upstream supply is lost. The polycarbonate bowl lets you see the condensate level at a glance, and the unit is rated for a maximum inlet pressure of 1.0 MPa (145 psi) with an operating temperature of -5 to 70 C (non-freezing).
This is a genuine AirTAC part supplied by airdistr.com. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, and options for thread (PT standard, G and NPT to order), drain type, filter grade, gauge style and scale, low-pressure type, check valve and bracket. Rated flow for this series is published as curves rather than a single figure, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GFR30008LJF1WTK AirTAC Filter Regulator NPT1/4 5 um |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (NPT thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Low-pressure 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 — square, MPa scale |
| Reflux valve | Fitted (reverse flow permitted) |
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. The low-pressure type adjusts over a lower band than standard; we confirm the exact figures from the factory datasheet. 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. |
|---|---|
| 08 | Port size PT1/4". 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)). |
| L | Low-pressure type. Blank is standard, L is the low-pressure type. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. C is round, F is square. |
| 1 | Gauge scale: MPa. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT thread. PT is the default; G is BSPP and T is NPT. |
| K | Reverse-flow (reflux) valve fitted. |
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 · PT1/4" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
On a machine-tool clamping circuit, this unit filters the shop air to 5 um, regulates it to the setpoint the clamps need, and the check valve holds the circuit if upstream pressure drops.
A packaging line's valve island and cylinders draw from a single 1/4 in drop; this filter regulator cleans water and fine particles out of the supply and keeps the regulated pressure visible on the square MPa gauge.
On a robotic pick-and-place cell, the 5 um element protects the vacuum generator and valve internals from fine contamination while the low-pressure regulator type sets the gentler pressure the gripper circuit needs.
Size 300 with a 1/4 in port sits in the middle of the GFR range; step up to 400 or 600, or down to 200, as your line's flow demand and piping change. This unit is already specified with the finer 5 um element, the differential-pressure drain, the square MPa gauge and the check valve, so the remaining decodable choices are thread (PT is the standard; G and NPT are order options - this code is NPT) and bracket (this code is J, no bracket). The low-pressure regulator type suits circuits that need gentler regulated setpoints than the standard type.
Flow for the GFR series is published as curves, not a single rated number, so we do not quote one here. Ask us to confirm the datasheet curve against your application's flow and pressure requirements before you order.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR300 series as curves rather than a single rated figure, so we do not quote a number here. Ask us and we will confirm the datasheet curve for this exact model against your application's flow and pressure requirements before you order.
Both are read straight from the code: W is the 5 um filter grade (the standard grade is 40 um), and K means a reverse (check) valve is fitted, which holds downstream pressure when the upstream supply is interrupted. The differential-pressure drain, square MPa gauge and low-pressure regulator type are also decoded from the code, and the J means no mounting bracket is included.
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.