The AirTAC GFR300C15MLJC3WT AirTAC Filter Regulator NPT1/2 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 GFR300 series combines water and particulate filtration with pressure regulation in a single body. This GFR300C15MLJC3WT is the 300 size with a 1/2 in NPT port, a 5 um filter element for finer cleaning than the standard 40 um grade, a manual drain so an operator releases collected water on a controlled schedule, and the low-pressure regulator type for circuits that run below standard shop-air settings. A round gauge scaled in bar is fitted so the set pressure is visible at the unit, 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 filter-regulator family is made in 200, 300, 400 and 600 sizes covering ports from 1/8 to 1 in, with drain, filter-grade, gauge, thread and bracket options to match the line; on this family the drain bowl is metal (aluminium alloy bowls are reserved for the 600 size). Flow for the series is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GFR300C15MLJC3WT AirTAC Filter Regulator NPT1/2 |
|---|---|
| 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) |
Feeds clamp cylinders on a fixture that must hold at reduced pressure - the low-pressure regulator type lets the circuit run below standard shop-air settings while the 5 um element keeps fine debris out of the clamping valves.
Air preparation at the machine on a machining centre: the filter section drops water and fine particulate before the machine's solenoid valves, and the fitted round bar gauge lets a setter verify the regulated pressure at a glance.
Regulated air for diverters and pushers on a packaging conveyor, with the manual drain suited to a unit an operator passes at shift start and end and the 5 um grade protecting the line's control valves.
Choose the size by port and duty: this unit is size 300 with a 1/2 in NPT thread; larger sizes carry larger ports, and PT (the standard thread) or G threads can be ordered instead of NPT. The 5 um element suits air feeding sensitive valves or instruments; the standard grade is 40 um if finer filtration is not needed. The manual drain fits a unit an operator passes regularly - order the automatic (A) or differential-pressure (default) drain codes if the unit is hard to reach. The round bar gauge is fitted here; the embedded square gauge and MPa or psi scales are the alternatives. This is the low-pressure regulator type, so confirm its set range against your circuit - the exact range is not published and we will confirm it on request. Flow is published as curves, not a single rating, so send us your flow requirement and we will confirm sizing 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 this series as curves, not as a single rated number, so we do not quote a figure here. Send us your port size and required flow and we will confirm the sizing from the datasheet on request before you order.
The M in the code sets a manual drain: an operator opens it to release collected water from the metal bowl. If the unit sits where nobody passes, the automatic (A) or differential-pressure (default) drain versions drain themselves - order that code instead. This unit also carries the 5 um (W) filter element, the low-pressure regulator type, a round gauge scaled in bar, and no mounting bracket.
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.