The AirTAC GFR300C15LJC3WTK AirTAC Filter Regulator NPT1/2, 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 GFR300C15LJC3WTK is a 300-size filter regulator: it removes water and particulate from compressed air and holds downstream pressure at your setpoint in one compact body. This configuration is threaded 1/2 in NPT, carries the fine 5 um filter element (code W), drains condensate by differential pressure, and is built as the low-pressure regulator type. A round gauge scaled in bar is fitted so the setpoint can be read directly, and a reverse/check valve is included to hold downstream pressure if the upstream supply drops. No mounting bracket is supplied with this variant.
This is a genuine AirTAC part from the GFR300 series, one of four sizes (200/300/400/600) spanning 1/8 in to 1 in ports, with manual or automatic drain, 40 um or 5 um filtration, gauge and thread options available across the range. Flow is published as curves rather than a single rating, so ask us to confirm the sizing figures and the low-pressure adjustment range from the datasheet for your application.
| Model | GFR300C15LJC3WTK AirTAC Filter Regulator NPT1/2, 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) |
Air clamps and swing cylinders on machining fixtures often run well below standard line pressure. This low-pressure-type filter regulator lets the setter dial in and read the clamp pressure in bar on the fitted gauge, while the 5 um element keeps spool valves in the clamp manifold clean.
A packaging line's 1/2 in main drop feeds sealers, diverters and film tension cylinders. Mounted at the drop, this unit strips water and fine dirt in one body, holds a steady regulated supply through shift-length runs, and the check valve keeps the circuit pressurised during brief upstream dips.
Test benches and analytical instruments with pneumatic actuation need clean, finely set air at modest pressures. The 5 um element protects transducers and precision valves, the bar-scaled gauge gives a readable setpoint for repeatable test conditions, and differential-pressure draining keeps the bowl clear without operator attention.
Start with the port step: this unit is 1/2 in NPT on the 300-size body, so match it to your line size and the flow your circuit needs - the next size up (400) or down (200) moves both port and flow capacity. The 5 um element (code W) suits instruments, valves and cylinders that need finer air than the standard 40 um grade. Drain is differential-pressure, which bleeds condensate automatically as the pressure differential builds - choose manual or automatic drain variants if your duty cycle needs it. This is the low-pressure regulator type, so confirm its adjustment range against your setpoint before ordering; the round gauge fitted here reads in bar, and MPa or psi scales plus an embedded square gauge are the other catalogue options. NPT is the thread on this unit; G (BSPP) and PT are the other order options. No bracket is fitted on this variant - bracketed versions are available.
One honest note on sizing: AirTAC publishes flow for this series as curves, not a single rated figure, so send us your flow and pressure requirements and we will confirm the right size from 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 flow for the GFR series as curves rather than a single rated number, so there is no one l/min or SCFM figure we can quote honestly. Tell us your line pressure, setpoint and required flow, and we will confirm from the datasheet curves whether this 300-size, 1/2 in NPT unit is correctly sized - including the adjustment range of the low-pressure regulator type.
In the code, W selects the fine 5 um filter element instead of the standard 40 um grade, and C3 selects the external round gauge scaled in bar (MPa and psi scales are the other options). This unit also carries the K code for a built-in reverse/check valve and J for no mounting bracket. If you would rather have 40 um filtration, a square embedded gauge or a bracketed body, those are catalogue variants of the same GFR300 series - ask us for 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.