The AirTAC GFR300C08MJF3WTK AirTAC Filter Regulator NPT1/4 5 um 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 See datasheet 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 GFR300C08MJF3WTK is an AirTAC GFR-series filter regulator: water and particulate filtration plus pressure regulation combined in a single body. This 300-size unit is threaded NPT1/4 (1/4 in), carries the finer 5 um filter element (code W, against the standard 40 um grade), drains by hand through its manual drain, and is fitted with an embedded square gauge scaled in bar. A reverse/check valve is built in (code K). The regulator covers 0.05-0.9 MPa (7-130 psi) with a maximum inlet pressure of 1.0 MPa (145 psi), the polycarbonate bowl suits ambient temperatures from -5 to 70 C (non-freezing), and this variant comes without a mounting bracket (code J).
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, offered with manual, automatic or differential-pressure drains, 40 um or 5 um elements, square or round gauges scaled in MPa, psi or bar, G (BSPP) or NPT threads in place of the PT standard, and an optional reverse/check valve. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GFR300C08MJF3WTK AirTAC Filter Regulator NPT1/4 5 um |
|---|---|
| Series | GFR300 filter regulator |
| Port size | See datasheet (PT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 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 | Differential-pressure drain |
| Bowl material | PC |
| Pressure gauge | Fitted — factory standard, Factory standard 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. Standard type, regulating 0.15 - 0.9 MPa (20 - 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. |
|---|---|
| C0 | Port size See datasheet. 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)). |
| (blank) | Standard type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| (blank) | PT 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 · See datasheet · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-C0 (two-unit set) |
Point-of-use conditioning for a CNC cell: the 5 um element and the 0.05-0.9 MPa regulation range feed clean air at a set pressure to tool-clamp and tool-change cylinders on the machine's NPT1/4 air drop.
Mounted at the inlet of a cartoning or filling machine, the unit removes condensed water and particles from the plant ring main and holds a steady regulated pressure for the machine's pick-and-place and sealing cylinders.
A filter regulator at each workstation on an assembly line, giving operators a bar-scaled, manually adjustable pressure for air tools and fixtures, with the built-in check valve holding the setting against upstream dips.
Choose the size by port and expected flow: this 300-size unit takes a 1/4 in NPT port; step up to 400 or 600, or down to 200, as your line's flow demand changes, since larger sizes carry larger ports and more flow. Drain choice matters: the manual drain here needs periodic hand draining, so pick automatic or differential-pressure if the unit sits where it cannot be attended. The 5 um element (code W) suits finer air-quality needs; the standard grade is 40 um. The embedded square gauge is scaled in bar; an external round gauge and MPa or psi scales are alternatives. Thread is NPT here, ordered as an option against the PT standard, with G (BSPP) also available. This variant comes without a mounting bracket (code J), so plan your fixing accordingly. Because flow is published as curves rather than a single rating, ask us to confirm sizing against your application before ordering.
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 GFR series as curves, not as a single rated figure, so we do not quote a number here. Tell us your working pressure and the flow your application needs, and we will confirm the correct size from the datasheet on request.
The W in the code specifies the finer 5 um element, where the GFR standard grade is 40 um - choose it when downstream valves and instruments need cleaner air. The M specifies a manual drain, so condensate is emptied by hand; automatic and differential-pressure drains are available in the same family if the unit cannot be attended regularly.
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.