The AirTAC GFR300C15C3WTK AirTAC Filter Regulator NPT 1/2 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 GFR300C15C3WTK is an AirTAC GFR300 filter regulator: filtration and pressure regulation combined in one body, removing water and particulate from compressed air and holding downstream pressure at your set point. This configuration carries a 1/2 in NPT port, the finer 5 um filter element (code W, against the 40 um standard), a differential-pressure drain that discharges collected condensate automatically as the pressure difference across the element builds, a round pressure gauge reading in bar, and a fitted reverse (check) valve. Maximum inlet pressure is 1.0 MPa (145 psi), the standard regulation range is 0.15-0.9 MPa (20-130 psi), and the operating temperature window is -5 to 70 C, non-freezing. At size 300 the bowl is polycarbonate (PC); only the 600 size uses an aluminium alloy bowl.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, PT as the standard thread and G (BSPP) or NPT as order options, filter grades of 40 um standard or 5 um, a choice of differential-pressure, automatic or manual drain, and embedded square or external round gauges in MPa, psi or bar scales. Flow for this series is published as curves rather than a single rated figure, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR300C15C3WTK AirTAC Filter Regulator NPT 1/2 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. |
|---|---|
| C1 | 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-C1 (two-unit set) |
Feeding the clamp cylinders and tool-changer actuators on a machining centre from the shop air ring main: the 5 um element strips water and fine particulate before they reach the valves, and the regulator holds a steady set pressure at the cell.
Supplying stop-and-transfer cylinders along a packaging conveyor, where the differential-pressure drain keeps condensate moving out during continuous running and the fitted check valve protects the downstream circuit when upstream supply dips.
Conditioning the air feeding gripper and filler-head actuators on a bottling line: one body does the filtering and the regulating, with the round bar gauge giving operators a local read of the set pressure at the machine.
Size 300 with a 1/2 in NPT port sits mid-range in the GFR line: step up to 400 or 600 where the circuit draws more air, or down to 200 for compact drops. The W code here means the 5 um element, one step finer than the 40 um standard - choose it where downstream valves and cylinders need cleaner air. Drain type is a real decision: differential-pressure (this unit) suits continuously running lines, automatic (A) suits lines that stop and start, and manual (M) suits supervised installations. This code carries a round gauge with a bar scale; the embedded square gauge and MPa or psi scales are the alternatives. Thread is NPT as coded - PT is the AirTAC standard and G (BSPP) is the other order option. A mounting bracket is included. Flow is published as curves, not a single rated figure, so send us your flow and pressure requirements 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 G-series flow as curves rather than a single rated figure, so there is no one l/min or SCFM number we can honestly quote. Send us your inlet pressure, set pressure and expected air consumption, and we will confirm the sizing from the datasheet on request before you order.
The W in the code specifies the 5 um filter grade, one step finer than the 40 um standard. Choose it where downstream directional valves, cylinders or process tooling need cleaner air; the 40 um grade remains the standard choice for general plant supply, and both grades are catalogue options across the GFR range.
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.