The AirTAC GFR300C15MLJF3WTK AirTAC Filter Regulator 1/2 in NPT 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 GFR300C15MLJF3WTK is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This 300-size configuration is fitted with a 1/2 in NPT port, a 5 um filter element (code W), a manual drain on the metal bowl, a low-pressure regulator, an embedded square gauge scaled in bar, and a reverse/check valve; no mounting bracket is included (code J).
It is a genuine AirTAC part from the GFR series, which spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in and options for PT, G or NPT threads, manual, automatic or differential-pressure drains, 40 um or 5 um elements, and gauge choices. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. Because published flow data appears as curves rather than a single rating, we confirm the datasheet figures for your application on request.
| Model | GFR300C15MLJF3WTK AirTAC Filter Regulator 1/2 in NPT |
|---|---|
| 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 filtered, regulated air to low-pressure clamping cylinders on a carton-sealing line, with the 5 um element guarding downstream valve seats and the manual drain letting an operator clear condensate at the end of a shift.
Sits upstream of pneumatic valve actuators on a rinse-and-fill line, cleaning the air supply and holding a reduced, stable pressure set from the square bar gauge while the reverse/check valve backs up the circuit.
Conditions the air feeding gripper and pick-and-place actuators on a machine-tending cell, where the 5 um grade protects fine control valves and the low-pressure regulator matches the circuit's reduced working pressure.
The decodable choices are straightforward: the 200/300/400/600 size step sets the port and the flow capacity you can draw, and this unit is a 300 with a 1/2 in NPT port. Drain type matters in service - this one is manual (code M), so the metal bowl is emptied by hand, while automatic and differential-pressure drains are available elsewhere in the series. The filter grade is 5 um (code W) against the 40 um standard. The gauge is the embedded square type scaled in bar; external round gauges with MPa, psi or bar scales are optional. Thread is NPT here, with PT as the standard and G also orderable. The regulator is the low-pressure type (code L); its exact regulation range is not published, so ask us to confirm it against your line pressure.
Flow is published as curves, not a single rating, so please ask us to confirm sizing 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 G-series flow as curves rather than a single rated figure, so we do not quote a number here. Send us your application details and we will confirm the datasheet flow curve and check the sizing of this 300-size, 1/2 in NPT unit against your demand before you order.
Code M means the metal bowl is drained by hand, so an operator opens the drain periodically to remove collected condensate; automatic and differential-pressure drain versions exist in the series if you prefer unattended operation. Code L marks the low-pressure regulator type, intended for circuits working below standard line pressures - its exact regulation range is not published, so ask us to confirm it for your application.
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.