The AirTAC GFR30008MJC1WTK 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 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 GFR300 is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration, GFR30008MJC1WTK, is the size 300 unit with a 1/4 in NPT port, a fine 5 um filter element (the W grade, against the 40 um standard), a manual drain on the PC bowl, an external round pressure gauge with MPa scale, and a built-in reverse (check) valve that holds the downstream setting when upstream pressure is lost. It is supplied without a mounting bracket. The standard regulator covers an adjustment range of 0.05-0.9 MPa (7-130 psi) with this manual-drain version, with a maximum inlet pressure of 1.0 MPa (145 psi) and an operating temperature of -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR filter-regulator line runs from size 200 through 400 to 600, with ports from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drains, 40 um or 5 um elements, square (embedded) or round gauges with MPa, psi or bar scales, and PT, G or NPT threads. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR30008MJC1WTK AirTAC Filter Regulator NPT1/4, 5 um |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (NPT thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 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 | Manual drain |
| Bowl material | PC |
| Pressure gauge | Fitted — round, 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. Standard type, regulating 0.05 - 0.9 MPa (7 - 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. |
|---|---|
| 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)). |
| (blank) | Standard type. Blank is standard, L is the low-pressure type. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. 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) |
Feeding filtered, regulated air to the directional valves and cylinder circuit of a small pneumatic stamping or clinching press, where the check valve holds the set pressure if the shop supply drops.
Conditioning the air that drives stopper, pusher and gate cylinders on a food or carton packaging conveyor line, with the 5 um element protecting the valve seats from fine particulate.
Supplying clean, regulated air to grippers and pick-and-place modules on a laboratory or pilot-line automation rig, where the manual drain suits a bench unit that is checked between runs.
Size 300 with a 1/4 in port is the mid step of the GFR range; step up to 400 or 600, or down to 200, according to the air demand of the circuit - we can check the published flow curves against your requirement before you order. The 5 um element in this code suits points of use that see finer contamination than the 40 um standard; the manual drain means an operator opens the drain periodically, so choose the automatic or differential-pressure drain instead if the unit sits where regular bleeding is impractical. The round MPa gauge is an option over the embedded square gauge, with psi and bar scales available, and the fitted check valve is worth keeping wherever a lost supply must not dump the regulated pressure downstream. NPT thread is ordered as an option against the PT standard; G (BSPP) is also available, and a bracket can be added if this J-coded, bracket-less unit needs panel fixing.
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 here. Tell us your line pressure and the air demand of the circuit and we will confirm the sizing against the datasheet curves on request before you order.
The M in the code specifies a manual drain: condensate collected in the PC bowl is released by hand, which suits units that are inspected as part of a routine. If the regulator will sit unattended, the automatic (A) or differential-pressure (blank) drain versions of the same GFR300-08 unit bleed the bowl without operator action - note that the manual-drain version is also the one with the wider 0.05-0.9 MPa (7-130 psi) adjustment range.
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.