The AirTAC GFR300C15LC3WTK AirTAC Filter Regulator NPT1/2 Low-Pressure 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 GFR300C15LC3WTK is a size 300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration carries a 1/2 in NPT port, the low-pressure regulator type, a fine 5 um filter element (code W), a differential-pressure drain that bleeds collected condensate automatically whenever the pressure differential across the element is high enough, an external round gauge with a bar scale, and a built-in reverse/check valve that holds downstream pressure if the supply is lost. A mounting bracket is included. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing); the polycarbonate bowl suits standard shop-air duty.
This is a genuine AirTAC part from the GFR series, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of PT, G or NPT thread, differential-pressure, automatic or manual drains, 40 um or 5 um filtration, and gauge options. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR300C15LC3WTK AirTAC Filter Regulator NPT1/2 Low-Pressure |
|---|---|
| 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) |
Fixture clamps and swing cylinders on an assembly line that must run at a low set pressure to avoid marking or crushing delicate parts get filtered, regulated air from one compact GFR body, with the check valve holding clamp pressure if the shop supply drops.
A packaging conveyor using low-pressure air jets, diverters and gate actuators needs water and fine particles removed before the valves; the 5 um element and differential-pressure drain keep the air dry without an operator having to drain a bowl each shift.
A laboratory or QC test bench running pneumatic instruments at low, stable pressure uses the low-pressure regulator type and the external bar gauge for a clear visual setpoint, with the 5 um grade protecting sensitive test fixtures.
Start with the port and size step: size 300 with a 1/2 in NPT port sits in the middle of the GFR range, so step up to size 400 or 600 if your line needs more flow, or down to size 200 for compact circuits. This unit is the low-pressure type (code L), intended where set pressures stay low; the exact regulation range for the low-pressure type is not published, so confirm it with us against your setpoint. The W code selects the 5 um element instead of the standard 40 um - choose 5 um where downstream valves, cylinders or instruments need finer air. Drain is differential-pressure by default; automatic (A) or manual (M) drains can be ordered instead. The C3 gauge code fits the external round gauge with a bar scale; embedded square gauges with MPa, psi or bar scales are the standard alternative. Thread here is NPT (T); PT is the standard thread and G (BSPP) is also an order option. A bracket is included on this code.
One honest note on sizing: AirTAC publishes flow for this series as performance curves, not a single rated figure, so we do not quote a flow number here. Send us your application details and we will confirm the curve data and sizing 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 performance curves rather than a single rated figure, so we do not quote a flow number for this unit. Tell us your application - port size, downstream demand and set pressure - and we will confirm the curve data and check the sizing with you before you order.
W selects the fine 5 um filter element instead of the 40 um standard element, and L identifies the low-pressure regulator type, used where set pressures stay low (the exact regulation range for the low-pressure type is not published, so confirm it with us). The rest of the code decodes as: size 300, 1/2 in NPT thread, differential-pressure drain, round gauge with bar scale, reverse/check valve fitted, bracket included.
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.