The AirTAC GFR300C08AJC1WTK AirTAC Filter Regulator NPT1/4 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 GFR300C08AJC1WTK is a filter regulator: it removes water and particulate from compressed air and holds downstream pressure at your setpoint in one compact body. This size 300 unit is threaded NPT1/4, carries a 5 um filter element (code W), an automatic drain that expels collected condensate without manual attention, a round pressure gauge reading in MPa, and a built-in check valve that helps hold downstream pressure if the upstream supply drops. Maximum inlet pressure is 1.0 MPa (145 psi), the working temperature range is -5 to 70 C (non-freezing), and the condensate bowl on this size is polycarbonate. No mounting bracket is included (code J), so plan your own fixing where the unit is not panel- or manifold-mounted.
This is a genuine AirTAC part. The G-series filter regulator line spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 inch, a choice of differential-pressure, automatic or manual drains, 40 um standard or 5 um filtration, embedded square or external round gauges with MPa, psi or bar scales, and PT, G or NPT threads. The standard regulation range for this automatic-drain configuration is 0.15-0.9 MPa (20-130 psi). Flow is published as performance curves rather than a single rating, so ask us to confirm the datasheet figures for your application on request.
| Model | GFR300C08AJC1WTK AirTAC Filter Regulator NPT1/4 |
|---|---|
| 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 the pneumatic vise and tool-clamp cylinders on a machining centre: the 5 um element protects the clamping valves from swarf-laden condensate, the regulator holds a steady clamp pressure, and the check valve helps keep the clamp held if supply pressure dips.
On a carton packaging conveyor, air cylinders divert, push and stop packs all shift long. This filter regulator keeps their control valves clean and their actuation pressure constant, while the automatic drain clears condensate without an operator stopping the line.
Bench-top lab automation - grippers, pinch valves and small actuators moving samples - needs dry, particle-free air at a stable setting. The 5 um grade and regulation down to 0.15 MPa (20 psi) suit these gentle, sensitive circuits.
Size and port set the capacity: this unit is size 300 with a 1/4 in NPT port; step up to 400 or 600 when demand outgrows the port, or down to 200 for compact circuits. Drain type is a real operating choice: automatic (this unit) suits unattended duty, manual suits periodically checked installations, and the differential-pressure default dumps condensate only when the pressure drop warrants it. Filtration is 5 um here (code W) against the 40 um standard - choose 5 um where downstream valves and instruments are sensitive to fine particles. The gauge on this configuration is an external round type reading MPa; embedded square gauges and psi or bar scales are alternatives. Threads come as PT (the standard), G (BSPP) or NPT, and brackets are optional - this code omits the bracket. Because flow is published as curves rather than a single rated figure, send us your air demand and operating pressure and we will confirm sizing against 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 filter-regulator flow as performance curves rather than a single rated number, so there is no one figure we can quote honestly. Tell us your operating pressure and air demand and we will confirm the flow from the datasheet on request before you order.
The W code specifies the 5 um element instead of the 40 um standard - the right choice when downstream valves, cylinders or instruments are sensitive to fine particles. The A code adds an automatic drain, so collected condensate is expelled without manual draining; manual and differential-pressure drains remain available where duty is lighter or monitored.
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.