The AirTAC GFR30008MLF2WK AirTAC Filter Regulator 1/4 in PT, 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 manual drain and regulates 0.05 - 0.9 MPa (7 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The AirTAC GFR30008MLF2WK is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This 300-size unit is built around a 1/4 in PT port, and the configuration is fully specified by its code: a 5 um filter element (the finer of the two catalogue grades), a manual drain on the PC bowl, the low-pressure regulator type, an embedded square gauge scaled in psi, a reverse/check valve fitted, and the mounting bracket included. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR family is published in sizes 200, 300, 400 and 600, with port sizes from 1/8 in to 1 in, a choice of drain types, 40 um or 5 um filtration, gauge scale options and PT, G or NPT threads. Flow for this model is published as curves rather than a single rated figure, so ask us and we will confirm the datasheet figures against your application before you order.
| Model | GFR30008MLF2WK AirTAC Filter Regulator 1/4 in PT, 5 um |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (PT thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 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 | Manual drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, psi 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". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 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. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| (blank) | PT 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 cartoning or case-packing line, the clamp and hold-down cylinders often run at reduced pressure to avoid crushing product. This low-pressure filter regulator cleans the supply, holds the set pressure at the clamp manifold, and its check valve keeps the circuit from dumping if upstream pressure dips mid-cycle.
A spray booth or paint kitchen needs air that is free of water and fine particulate before it reaches the gun, because contamination shows up as fisheyes in the finish. The 5 um element polishes the supply at the point of use, and the manual drain lets the operator bleed accumulated condensate at the start of each shift.
Plasma torches are sensitive to moisture and pressure variation in the shop-air feed. Placed at the drop to the plasma unit, this filter regulator removes water and fine dirt, sets the torch supply pressure locally, and the psi-scaled square gauge gives the operator a direct read at the machine.
Size and port are the first choice: step up through 200, 300, 400 and 600 as your flow demand and pipe size grow - this unit sits at 300 with a 1/4 in PT port. Drain type is a real operating choice: manual drain means someone bleeds the bowl on a routine, while automatic and differential-pressure drains discharge condensate without attention; this model is manual, so plan the check into your maintenance schedule. Filtration is 5 um here (40 um is the standard grade, W codes the 5 um element) - choose 5 um where downstream valves, cylinders or instruments are sensitive. The gauge is the embedded square type scaled in psi; external round gauges and MPa or bar scales are options. Thread is PT as standard, with G (BSPP) and NPT available to order, and the bracket is included. Because flow is published as curves and not a single rating, send us your flow and pressure requirements and we will confirm sizing against the datasheet 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 GFR flow as performance curves rather than a single rated figure, so there is no one number we can quote honestly. Tell us your line pressure, set pressure and expected air demand, and we will confirm the sizing from the datasheet curves for this exact model before you order.
The M in the code specifies a manual drain: condensate collected in the PC bowl is released by operating the drain by hand, which suits stations that are checked regularly. If you would rather not rely on routine bleeding, the same 300-size filter regulator is available with an automatic or a differential-pressure drain - ask us for the matching model code.
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.