The AirTAC GFR300C08MC1WTK 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 AirTAC GFR300C08MC1WTK is a 300-size filter regulator that cleans compressed air and sets downstream pressure in a single body. Water and particulate are stripped out by a 5 um filter element, and the regulated outlet is set anywhere in the 0.05-0.9 MPa (7-130 psi) range. This configuration carries a 1/4 in NPT port, a metal bowl with a manual drain you twist open to dump collected condensate, a round MPa pressure gauge fitted, a built-in reverse (check) valve that holds the downstream setting if upstream pressure is lost, and a mounting bracket in the box. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR filter-regulator line spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, and is configurable by drain type (differential-pressure, automatic or manual), filter grade (40 um standard, 5 um with the W code), gauge style and scale, thread (PT standard, G and NPT to order), bracket and reverse valve. Flow is published as curves rather than a single rated figure, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GFR300C08MC1WTK 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 preparation for the clean, dry, pressure-controlled air feeding tool changers, clamps and pneumatic cylinders on a machining centre, with the 5 um element protecting fine control valves.
Filtering and regulating the air that drives sealing jaws, diverters and pusher cylinders on a packaging or filling line, with the check valve holding the set pressure through upstream dips.
Setting and holding consistent clamping force on a pneumatic press or workholding fixture, where the regulator keeps clamp pressure repeatable and the gauge gives the operator a visible setpoint.
Start with the port and size: this unit steps up to a 1/4 in NPT connection in the 300 frame, and the right size for you is the one whose flow curve covers your machine's air demand at your working pressure - we can check that against the datasheet before you order. The 5 um element (W code) suits downstream equipment that wants finer filtration than the 40 um standard; the trade-off is a element that loads sooner, so drain discipline matters. The manual drain means an operator opens the drain valve to expel condensate - simple and reliable where the unit is accessible and checked routinely; choose the automatic drain code instead if the bowl is hard to reach. The fitted round gauge reads in MPa; psi and bar scales are available, and an embedded square gauge is the standard alternative. Thread is NPT here; PT is the catalogue standard and G (BSPP) is also orderable. A bracket is included for wall or surface mounting, and the reverse valve holds the regulated pressure downstream.
One honest note on sizing: AirTAC publishes flow for this family as curves, not a single rated number, so we do not quote a rated flow figure. Send us your application details and we will confirm the sizing from the datasheet 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 family as curves rather than a single rated figure, so we do not state a rated flow, Cv or SCFM number. Tell us your port size, working pressure and the air demand of your equipment, and we will confirm the sizing from the datasheet on request before you order.
The M code in this model specifies a manual drain: an operator opens the drain valve at the bottom of the metal bowl to expel collected water. That suits units mounted where they are easy to see and service. If the bowl sits in an awkward spot or the compressor runs unattended, order the automatic-drain or differential-pressure-drain variant of the same GFR300 filter regulator 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.