The AirTAC GFR300C08MJC1WTK AirTAC Filter Regulator NPT1/4 5um 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 GFR300C08MJC1WTK is a 300-size filter regulator that removes water and particulate from compressed air and sets downstream pressure in a single body. This configuration is built with a 1/4 in NPT port, a fine 5 um filter element, a manual drain bowl, a round pressure gauge scaled in MPa, and a reverse (check) valve, and it ships without a mounting bracket. The manual drain means an operator opens the bowl drain to discharge collected condensate, which suits installations checked as part of a routine walk-round. The check valve holds the downstream circuit if upstream supply is interrupted.
This is a genuine AirTAC part. The GFR series is offered in sizes 200, 300, 400 and 600 with a choice of port, thread (PT standard, G and NPT as options), drain type, 40 um or 5 um filtration, gauge style and scale, and bracket or no bracket. Maximum inlet pressure is 1.0 MPa (145 psi), the working temperature range is -5 to 70 C (non-freezing), and the regulation range for this manual-drain version is 0.05-0.9 MPa (7-130 psi). Flow is published as curves rather than a single rating, so we confirm datasheet figures on request.
| Model | GFR300C08MJC1WTK AirTAC Filter Regulator NPT1/4 5um |
|---|---|
| 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) |
Clean, regulated air to the directional valve and cylinder of a small pneumatic press or clinching station, with the 5 um element protecting the valve spools from particulate carried in shop air.
Point-of-use filtering and regulation ahead of sealing jaws and vacuum generators on a packaging line, where the manual drain is emptied during scheduled changeover and cleaning.
Mounted at the inlet of a machine's pneumatic control manifold to condition air for pilot valves and sensors; the check valve helps the set pressure stand when the upstream supply dips, and the MPa gauge gives a local reading.
Start with the port step: the GFR300 carries 1/4 in ports, and larger sizes (400, 600) move up to bigger ports and more flow, so match the size to your line's air demand. Choose the drain type for how the unit is serviced: manual drain (this model) for attended maintenance, automatic or differential-pressure drain where the unit should discharge condensate without operator action. Pick the filter grade to match the downstream equipment: 40 um is the standard element, 5 um (code W, as here) for finer protection. Gauge style and scale (square embedded or round external; MPa, psi or bar) and the thread family (PT standard, G or NPT) are ordered to suit your panel and region, and a bracket can be added for panel mounting.
One honest note on sizing: AirTAC publishes flow for this series as curves, not as a single rated figure, so we do not quote a flow number here. Ask us to confirm the flow curve and datasheet figures against your application before you order.
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 number, so we do not quote a flow figure for this model. Tell us your application and we will confirm the flow curve and full datasheet figures for the GFR300 at 1/4 in NPT on request.
Code M in the model means the bowl drain is opened by hand to discharge collected condensate, which suits stations visited during routine maintenance; automatic (A) and differential-pressure (blank) drains are the unattended alternatives. For this manual-drain GFR the regulator adjustment range is 0.05-0.9 MPa (7-130 psi), and the filter element is the fine 5 um grade (code W).
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.