The AirTAC GFR300C08MJC2WK AirTAC Filter Regulator PT1/4, 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 AirTAC GFR300C08MJC2WK is a 300-size filter regulator that cleans compressed air and sets downstream pressure in a single body. This configuration carries a 5 um filter element (the finer W grade, versus the 40 um standard), a manual drain for the bowl, a downstream pressure range of 0.05-0.9 MPa (7-130 psi), and a reverse/check valve fitted. It is ported PT1/4 (1/4 in, PT thread standard) and includes an external round pressure gauge scaled in psi. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. Because the drain is manual, drain the bowl periodically as part of routine maintenance.
This is a genuine AirTAC part. The GFR series is available in sizes 200, 300, 400 and 600, with port sizes from 1/8 in to 1 in, thread options PT, G (BSPP) and NPT, filter grades 40 um and 5 um, differential-pressure, automatic or manual drains, gauge choices and scale options. Flow is published as curves rather than a single rated figure, so we confirm the datasheet and flow figures for your application on request.
| Model | GFR300C08MJC2WK AirTAC Filter Regulator PT1/4, 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) |
Feeding clean, regulated air to the tool-change and clamping circuits of a machining centre, where the 5 um element protects precision valves from particulates and the regulator holds a steady set pressure.
Conditioning the air feeding pneumatic cylinders on a carton-sealing or wrapping conveyor, combining water and particle removal with pressure regulation in one 1/4-in ported body.
Installed at a work-cell drop from the main header in a factory, giving operators a local psi gauge, a set-and-hold regulator and a manual-drain bowl for scheduled maintenance rounds.
Choose the 300 size with the 1/4 in PT port when your line runs at roughly quarter-inch porting; step up to size 400 or 600 where higher flow is needed, since larger sizes carry larger ports. This unit already specifies the finer 5 um element - select it where downstream valves and instruments are sensitive to particulates, and stay with 40 um where coarser protection is enough. The manual drain suits installations where an operator drains the bowl on a schedule; choose automatic or differential-pressure draining where the unit is hard to reach. The fitted round gauge reads in psi; MPa and bar scales are also available. PT is the standard thread, with G (BSPP) and NPT as order options, and this configuration omits the mounting bracket. Flow for the GFR series 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 GFR series as curves rather than a single rated figure, so no rated flow number is stated here. Contact us and we will confirm the datasheet and flow figures for your specific application before you order.
The M in the code specifies a manual drain on the bowl. Condensate collected by the filter must be drained by hand at intervals as part of routine maintenance. If the unit will be mounted where regular access is difficult, ask us about the automatic or differential-pressure drain variants instead.
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.