The AirTAC GFR300C15F1WTK AirTAC Filter Regulator 1/2 NPT 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 GFR300C15F1WTK 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 setpoint. This configuration is built around a 1/2 in NPT port, a 5 um filter element (the finer of the two catalogue grades), and a differential-pressure drain that discharges collected condensate as air flows through the bowl. An embedded square gauge scaled in MPa shows the regulated pressure, a reverse/check valve is fitted, and a mounting bracket is included. The regulator is the standard type with an adjustment range of 0.15-0.9 MPa (20-130 psi); maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing). The size 300 bowl is polycarbonate (PC).
This is a genuine AirTAC part. The GFR family is published in four sizes (200, 300, 400 and 600) with ports from 1/8 to 1 in, filter grades of 40 um standard or 5 um optional, a choice of differential-pressure, automatic or manual drain, square or round gauges with MPa, psi or bar scales, and PT, G or NPT threads. Because AirTAC publishes flow only as curves rather than a single rated figure, we confirm the datasheet and sizing figures for your application on request.
| Model | GFR300C15F1WTK AirTAC Filter Regulator 1/2 NPT 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. |
|---|---|
| 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 clean, regulated air to a machining centre's directional valves and workholding clamps: the 5 um element screens particulate out before it reaches the valves, while the regulator holds a steady clamp pressure and the MPa gauge gives operators a visible setpoint.
Supplying packaging machinery where cylinders drive sealing bars, pushers and case formers: the regulator keeps actuator pressure consistent from shift to shift, and the differential-pressure drain clears condensate from the bowl as product keeps the line moving.
Regulating air to filler and bottle-washer control circuits where steady pressure keeps pilot valves and actuators repeating correctly, and the fitted check valve holds the downstream circuit against backflow when upstream supply dips.
Choose the size and port by the flow your line needs: the 300 size shown here sits mid-range in the GFR family (200, 300, 400, 600), with ports stepping from 1/8 to 1 in as size increases - match the port to your piping and ask us to check the flow curve against your demand. Pick the drain: differential-pressure (this unit, which drains with flow), automatic, or manual. Pick the element: 40 um standard or 5 um as fitted here for finer protection of downstream components. Gauges come square (embedded, as here, MPa scale) or round (external), with MPa, psi or bar scales. Thread is PT as standard; G (BSPP) and NPT are catalogue options - this unit is ordered in NPT. Brackets are included unless the J (no bracket) code is specified. Flow is published as curves, not a single rating, so ask us to confirm sizing against your application before ordering.
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 series as curves, not as a single rated figure, so we do not quote a number here. Send us your line pressure and air demand and we will confirm the sizing from the datasheet on request.
With no drain code in the model, this unit uses a differential-pressure drain, which discharges collected condensate when air flows through the bowl. The GFR catalogue also offers automatic (A) and manual (M) drains - tell us which suits your installation and we will quote the matching code.
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.