The AirTAC GFR30008ALF3TK 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 PT1/4" ports, a automatic 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 GFR30008ALF3TK is a GFR-series filter regulator: filtration and pressure regulation combined in one body, for compressed air only. This 300-size unit has a 1/4 in NPT port, a 40 um filter element, an automatic drain that clears collected water without manual attention, and a low-pressure regulator type for circuits that run below standard working pressures. It is supplied with an embedded square gauge scaled in bar, a reverse/check valve, and a mounting bracket.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, optional 5 um filtration, manual or differential-pressure drain alternatives, and PT or G thread options to order. We confirm flow and datasheet figures on request, since flow is published as curves rather than a single rating.
| Model | GFR30008ALF3TK AirTAC Filter Regulator NPT1/4 Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (NPT thread) |
| Filtering grade | 40 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 | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, bar 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". |
| A | Drain: Automatic 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. |
| (blank) | Filtering grade 40 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" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
Glue heads and coating nozzles on packaging and converting lines often run at reduced pressures. This unit filters the supply and holds a low regulated setting, with the bar-scaled gauge giving the operator a direct setpoint readout.
Bench-top rigs, test stations and pilot lines need clean, gently regulated air at low pressure. The automatic drain keeps condensate off the instruments without daily attention, and the check valve holds the setting if supply dips.
Air cylinders and actuators that place, press or divert fragile product on conveyor lines benefit from low regulated pressure. The 40 um element protects valve seals from particulate and water carried in the shop-air supply.
Size the unit by stepping up or down through the GFR sizes (200/300/400/600) against the flow your line needs - the 300 size carries a 1/4 in port here, and larger sizes move more air. Choose the drain: automatic (this unit) for unattended condensate removal, manual for periodic draining, or differential-pressure as the default behaviour. Filter grade is 40 um as standard; specify the W code if you need 5 um. The square gauge is fitted in bar scale; MPa and psi scales and an external round gauge are alternatives. Thread is NPT here, with PT as the standard catalogue thread and G available to order. The low-pressure type (code L) suits circuits running below standard pressures - confirm the exact regulation range with us before ordering, as it is not published for this variant. Flow is published as curves, not a single rating, so ask us to confirm sizing against your application 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 GFR series as curves, not as a single rated figure, so we do not quote a number. Tell us your application and we will confirm the flow data from the datasheet on request before you order.
The L code in GFR30008ALF3TK means the regulator is the low-pressure type, intended for circuits running below standard working pressures; the exact regulation range for this variant is not published, so we confirm it on request. The A code means the drain is automatic: collected condensate is expelled from the PC bowl without manual intervention.
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.