The AirTAC GFR300C15MLNTK 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 GFR300C15MLNTK is a size-300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is built with a 1/2 in NPT port, a metal bowl with manual drain, standard 40 um filtration, and a low-pressure regulator type, so it suits lines that run filtered air at reduced pressure rather than full line pressure. A built-in reverse/check valve holds downstream pressure when the upstream supply is lost, no gauge is fitted, and a mounting bracket is included for panel or frame mounting.
This is a genuine AirTAC part in the GFR series, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of drain types, 40 um or 5 um filtration, gauge options, and PT, G or NPT threads. Flow for this series is published as curves rather than a single rating, so ask us to confirm sizing and datasheet figures against your application before ordering.
| Model | GFR300C15MLNTK 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) |
Feeding spray guns in a finishing booth: the 40 um element strips water and pipe scale that would otherwise cause fisheyes in the finish, while the low-pressure regulator holds the reduced pressure the guns are set up for. The check valve keeps the setting stable if the shop supply dips.
Supplying the low-pressure auxiliary circuits on an air-jet weaving line, where filtered air at a reduced, steady pressure is needed for thread guidance and cleaning jets. The manual drain suits a shift-start blowdown routine in the weave room.
Air preparation for the low-pressure grip and cap-tightening cylinders on a bottling conveyor, where full line pressure would overstress the mechanism. The included bracket mounts the unit on the machine frame next to the drop it serves.
Work through the decodable choices in order. First, size and port: the 300 frame with a 1/2 in NPT port sits mid-range in the GFR line-up; step up to 400 or 600 when the line needs more flow capacity, and down to 200 for compact circuits. Second, drain: this unit has a manual drain, so an operator opens the bowl drain during checks; choose automatic or differential-pressure drain codes if the installation cannot be attended regularly. Third, filtration grade: 40 um is fitted here as the standard element, with 5 um (code W) available where finer pre-filtration is needed. Fourth, gauge: none is fitted on this code, and gauge scale options exist on other codes. Fifth, thread: PT is the standard thread, while G (BSPP) and NPT are catalogue options to order - this code carries the NPT option. A bracket is included.
On sizing, be aware that flow for the GFR series is published as curves, not as a single rated figure, and the exact regulation range of the low-pressure (L) type is not stated in the published tables. Ask us to confirm both 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 rather than a single rated figure, and the same applies to the regulation range of the low-pressure type in this configuration, so no single number can be quoted honestly here. Tell us your line pressure, regulated setpoint and expected air demand, and we will confirm the sizing and the exact figures from the datasheet on request before you order.
The M in the code specifies a manual drain: condensed water collects in the metal bowl and an operator opens the drain valve during routine checks. This is a deliberate choice where drains are attended on a schedule. If the installation is unattended or hard to reach, other codes in the GFR300 series offer automatic drain (code A) or differential-pressure drain (blank) instead - ask us to quote the variant.
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.