The AirTAC GFR300C08MC3WT 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 GFR300C08MC3WT is a filter regulator: one body that removes water and particulate from compressed air and holds the downstream pressure at your setpoint. This 300-size unit is tapped NPT1/4, carries the finer 5 um filter element instead of the 40 um standard, drains its metal bowl manually, and is fitted with an external round gauge scaled in bar. The regulator is the standard type with an adjustment range of 0.05-0.9 MPa (7-130 psi), maximum inlet pressure is 1.0 MPa (145 psi), operating temperature is -5 to 70 C (non-freezing), and a mounting bracket is included.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 inch, and options across the range for automatic or differential-pressure drains, 40 um or 5 um filtration, embedded square or external round gauges in MPa, psi or bar scales, G (BSPP) or NPT threads in place of the PT standard, and a reverse/check valve. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet numbers for your application.
| Model | GFR300C08MC3WT 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) |
Feeding clamps and vise cylinders on a machining centre: the 5 um element keeps water and pipe scale out of the clamp valve stack, while the regulator holds a steady clamping pressure anywhere in the 0.05-0.9 MPa range and the bar gauge lets the setter verify the setpoint.
Diverting cylinders that push cartons between lanes need clean, stable air at the line drop. Mounted at the drop, this NPT1/4 filter regulator conditions the supply and the round gauge gives operators an at-a-glance pressure check during shift walks.
A lab or QC bench running air-powered fixtures and gauges benefits from 5 um filtration ahead of sensitive instruments, while the manual drain allows controlled bleeding of the bowl between test runs.
Start with the size and port: 200, 300, 400 and 600 step up through 1/8 to 1 inch ports, so move up a size when your circuit demands more air than the port comfortably passes - we will check the flow curve against your requirement before you order. Drain type is a real operating choice: manual (this unit) needs periodic bleeding, automatic drains continuously, and the differential-pressure default dumps when pressure drop calls for it; drain type also sets the adjustment floor, 0.05 MPa (7 psi) for manual versus 0.15 MPa (20 psi) for automatic and differential-pressure, both to 0.9 MPa (130 psi). Filtration is 40 um standard or 5 um (code W, as here) where finer protection matters. The embedded square gauge is standard and an external round gauge is optional in MPa, psi or bar scales - this unit carries the round bar gauge. Thread is PT as the AirTAC standard with G (BSPP) and NPT as order options; this unit is NPT. A bracket is included, and the family accepts a reverse/check valve where return-flow protection is needed.
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 rather than a single rated figure, so we do not quote one number. Tell us your inlet pressure and air demand and we will confirm the datasheet curve and check that this size suits your application before you order.
This unit's bowl uses a manual drain: it is opened periodically to dump collected water. Choose manual where the installation is checked daily anyway; choose the automatic or differential-pressure drain option where the unit is hard to reach or the air is wet. Drain type also affects the regulation range: manual-drain units adjust from 0.05 MPa (7 psi), while automatic and differential-pressure versions start at 0.15 MPa (20 psi), both up to 0.9 MPa (130 psi).
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.