The AirTAC GFR300C08MJC3T AirTAC Filter Regulator NPT 1/4 in 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 GFR300C08MJC3T is a filter regulator: it removes water and particulate from compressed air and holds downstream pressure at your setpoint in one compact body. This configuration is built for a 1/4 in NPT port, has a manual-drain polycarbonate bowl, a 40 um standard filter element, a standard-range regulator adjustable from 0.05 to 0.9 MPa (7-130 psi), and a round pressure gauge with a bar scale. It is supplied without a mounting bracket and without a reverse/check valve, and its maximum inlet pressure is 1.0 MPa (145 psi) with a working temperature range of -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR family spans four sizes (200, 300, 400 and 600) with ports from 1/8 to 1 in, and options across the family include automatic or differential-pressure drains, a 5 um element (code W), embedded square or external round gauges with MPa, psi or bar scales, G or NPT threads, and mounting brackets. AirTAC publishes flow as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GFR300C08MJC3T AirTAC Filter Regulator NPT 1/4 in |
|---|---|
| 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 a machining centre's pneumatic tool clamps and chip-clearing jets, with the manual drain purged during scheduled maintenance.
Regulating air to carton-sealing cylinders and label-applicator actuators on a packaging conveyor, where the operator drains the bowl at end of shift.
Holding a steady setpoint to pick-and-place grippers and small air cylinders in an assembly cell, with the round bar gauge giving operators a local pressure readout.
Pick the size by the air demand of the circuit, not the fitting alone: the GFR family steps through sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and this unit is already fixed at 300 size with a 1/4 in NPT port. Drain type is a real operating choice: manual (this unit) means an operator opens the drain periodically, while automatic and differential-pressure versions empty the bowl without attention. The element here is the 40 um standard; specify code W for the 5 um grade where finer filtration is needed. Gauges come as an embedded square type as standard or as the external round type fitted here, with MPa, psi or bar scales. Thread is PT as standard with G and NPT as order options, and brackets are optional (this unit has none). Because AirTAC publishes flow as curves rather than a single rating, ask us to confirm sizing 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 GFR300 as curves rather than a single rated figure, so we do not quote a rated flow number. Tell us your application and required conditions, and we will confirm the flow and sizing from the datasheet on request before you order.
The M in the code sets a manual drain: condensate collects in the polycarbonate bowl until someone opens the drain by hand, typically as part of a routine check. If you want the bowl emptied without operator attention, ask about the automatic (code A) or differential-pressure (blank) drain versions of the GFR300.
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.