The AirTAC GFR300C08MJC3WTK AirTAC Filter Regulator NPT1/4 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 GFR300C08MJC3WTK is an AirTAC GFR300 filter regulator: water and particulate filtration plus pressure regulation combined in a single body. This configuration is decoded as a size 300 unit with a 1/4 in NPT port, a 5 um filter element (code W), a manual drain (M), a round pressure gauge reading in bar (C3), a reverse/check valve fitted (K) and no mounting bracket (J). Maximum inlet pressure is 1.0 MPa (145 psi), the regulator adjustment range with manual drain is 0.05-0.9 MPa (7-130 psi), and the working temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 covering ports from 1/8 in to 1 in, with a choice of manual, automatic or differential-pressure drain, 40 um standard or 5 um (W) filtration, square or round gauges scaled in MPa, psi or bar, and PT (standard), G or NPT threads. Flow is published as curves rather than a single rated figure, so we confirm flow and datasheet figures on request.
| Model | GFR300C08MJC3WTK AirTAC Filter Regulator NPT1/4 |
|---|---|
| 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 machining centre's pneumatic clamps and tool-change cylinders: the 5 um element strips water and swarf-carried particulate while the regulator holds a steady setting at the machine.
Mounted at the drop ahead of sealing-head and wrapping cylinders on a packaging conveyor, giving the line one body that both cleans the air and sets the working pressure for consistent actuation.
Feeding weld-gun clamp cylinders on an automotive robot cell, where the manual drain suits a station serviced each shift and the fitted check valve is part of the specified configuration.
Choose the size and port step (200/300/400/600, 1/8 in to 1 in) against the air demand of the circuit - larger sizes carry larger ports and more flow. For this family also decide the drain type (manual, automatic or differential-pressure), the filter grade (40 um standard or 5 um with W), the gauge style and scale (embedded square or external round; MPa, psi or bar), the thread (PT is the standard; G and NPT are order options) and whether a bracket is needed. Flow is published as curves, not a single rating, so 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 GFR300 as curves, not as a single rated number, so there is no one l/min or SCFM figure we can honestly quote. Tell us your application and we will confirm the flow figures from the datasheet on request before you order.
This unit is specified with a manual drain: collected condensate is emptied from the bowl by hand as part of routine service. AirTAC also offers automatic and differential-pressure drains on the GFR family if you would prefer the bowl to discharge without operator action.
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.