The AirTAC GFR300C15ALJNTK 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 GFR300C15ALJNTK is an AirTAC GFR300 filter regulator: water and particulate filtration plus pressure regulation combined in a single body. This configuration is built for a 1/2 in NPT port, drains condensate automatically, filters to the standard 40 um grade, and is the low-pressure regulator type with a reverse/check valve fitted. No pressure gauge is supplied and no 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.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, and options for manual or differential-pressure drains, a 5 um filter element, gauges in MPa, psi or bar scales, and G (BSPP) or NPT threads in place of the PT standard. Flow for this series is published as curves rather than a single rated figure, so ask us to confirm sizing and datasheet figures for your application before ordering.
| Model | GFR300C15ALJNTK 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) |
Clean, low-pressure regulated air to the clamping fixtures on a machining cell. The built-in check valve helps hold the downstream circuit, while the automatic drain keeps condensate out of the fixture lines without daily attention.
Filtered and regulated low-pressure air feeding atomizing nozzles on a paint line. The 40 um element removes water and particulate that would otherwise spoil finish quality, and the low-pressure type matches the gentle setpoints nozzles need.
Point-of-use air preparation for small cylinders and actuators along a packaging conveyor. One body does the filtering and the regulating, the automatic drain handles condensate, and the 1/2 in NPT port drops straight into the drop line.
What the code fixes: size 300 with a 1/2 in NPT port, automatic drain, 40 um filtration, low-pressure regulation, a built-in check valve, no gauge and no bracket. If your circuit runs at low regulated pressure, the low-pressure type is the right pick; the exact regulation range for this variant is not published, so confirm it with us against your setpoint. The automatic drain suits installations where nobody will drain the bowl by hand; manual and differential-pressure drains are available in the same size. If you need finer filtration, the 5 um element (code W) can be specified instead of the standard 40 um. Thread alternatives are G (BSPP) or PT, and a gauge or bracket can be added on other configurations.
On sizing: flow for this series is published as curves, not a single rating, so send us your required flow and working pressure and we will confirm against the datasheet that the size 300, 1/2 in port unit matches your application 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 GFR300 series as curves rather than a single rated number, so we do not quote a rated flow figure. Send us your required flow and working pressure and we will confirm against the datasheet whether the size 300, 1/2 in port unit suits your application.
The N in the code means no gauge is fitted on this unit. Other GFR300 configurations can be ordered with an embedded square gauge or an external round gauge in MPa, psi or bar scales. This variant is the low-pressure regulator type, so confirm the regulation range with us when ordering.
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.