The AirTAC GFR30008LF3WT AirTAC Filter Regulator NPT1/4 Low-Pressure 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 GFR30008LF3WT is a size 300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one body, so you condition and control the air with a single component. This configuration is fitted with 1/4 in NPT ports, the 5 um filter element (code W) for finer filtration than the standard 40 um grade, a differential-pressure drain that bleeds collected condensate automatically whenever the pressure differential across the element is high enough, and the low-pressure regulator type for circuits that run at reduced supply pressure. An embedded square gauge graduated in bar is included, the polycarbonate bowl suits this size, and a mounting bracket is supplied.
This is a genuine AirTAC part. The GFR family is offered in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, and with choices of drain type, filter grade, gauge scale and thread form (PT standard, with G and NPT as order options). Maximum working (inlet) pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C, non-freezing. Flow for this series is published as curves rather than a single rated figure; ask us and we will confirm the datasheet figures for your application on request.
| Model | GFR30008LF3WT AirTAC Filter Regulator NPT1/4 Low-Pressure |
|---|---|
| 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, bar 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. 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. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. C is round, F is square. |
| 3 | Gauge scale: bar. 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. |
| (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 · PT1/4" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
Supplying cleaned, regulated low-pressure air to the clamping cylinders of a machining fixture, where the 5 um element protects the clamp valve seats and the square bar gauge lets the setter read set pressure directly at the fixture.
Conditioning the air feeding the cylinders and air jets on a packaging conveyor section, with the differential-pressure drain clearing condensate during running so the line does not need to be stopped for bowl draining.
Filtering and regulating the supply to the vacuum generators and gripper cylinders of a robotic pick-and-place cell, where the low-pressure regulator type matches circuits run at reduced supply pressure and the included bracket simplifies panel mounting.
Size and port are the first decision: the 300 frame with 1/4 in NPT ports here should be stepped up or down (200/400/600, 1/8 in to 1 in) against the air demand of the circuit, and we will confirm the flow curve against your application before you order, since the catalogue publishes flow as curves rather than one rated number. Filter grade is a real choice on this unit: 40 um is the standard element and the W code on this model selects the finer 5 um element, so pick 5 um where downstream valves and cylinders need cleaner air. Drain type is selectable: this unit uses the differential-pressure drain (default), while automatic (A) and manual (M) versions exist - differential and automatic drains suit unattended installations, manual suits periodically attended ones. The low-pressure (L) regulator type on this model is for circuits supplied at reduced pressure; its exact adjustment range is not published in the material we hold, so confirm it with us. Gauge scales are available in MPa, psi and bar - this unit carries the embedded square gauge in bar, with an external round gauge as an option. Thread is PT as standard with G and NPT as catalogue options; this model is ordered in NPT. A mounting bracket is included.
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 series as characteristic curves, not as a single rated number, so we do not quote a rated flow figure. Send us your application details - supply pressure and the air demand of the circuit - and we will confirm the relevant datasheet curve and sizing on request before you order.
The L in the code GFR30008LF3WT marks the low-pressure regulator type, intended for circuits supplied at reduced pressure rather than the full standard range. The exact adjustment range for the low-pressure type is not published in the material we hold, so please confirm it with us on request. Everything else about the unit is standard: 5 um filtration, differential-pressure drain, embedded square bar gauge and a mounting bracket 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.