The AirTAC GFR300C15MLJF1T 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 GFR300C15MLJF1T is a 300-size filter regulator that removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration has 1/2 in NPT ports, is the low-pressure type, and carries a 40 um filter element with a metal bowl fitted with a manual drain, so the bowl is emptied by hand as part of routine maintenance. An embedded square gauge reading in MPa is included for setting and monitoring the outlet pressure, and no mounting bracket is supplied with this variant. 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 series is available in sizes 200, 300, 400 and 600 covering ports from 1/8 in to 1 in, with choices of manual, automatic or differential-pressure drain, a 5 um element (code W) in place of the 40 um standard, alternative gauge scales (MPa, psi or bar), PT, G or NPT threads, and bracket options. Flow for this series is published as curves rather than a single rating, so ask us to confirm the figures against your application before ordering.
| Model | GFR300C15MLJF1T 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) |
Feeds and regulates the air supply to workholding clamps on a CNC machining cell, where the low-pressure type lets the circuit run at reduced clamping pressure and the 40 um element keeps water and swarf-carrying condensate out of the clamp cylinders.
Sits at the drop to spray guns in a paint or coating booth, filtering condensed water and pipe scale that would otherwise blemish the finish while holding a steady, lower regulated pressure at the gun inlet.
Conditions and regulates the air feeding diverters, pushers and stop gates along a packaging conveyor, with the manual-drain metal bowl emptied during scheduled line cleaning and the square MPa gauge giving operators a visible setpoint.
Start with the port size: this unit is 300 size with 1/2 in NPT ports, and the GFR range steps through 200, 300, 400 and 600 so you can match the size to the air demand of the circuit. Choose the drain to suit access: manual drain (this unit) suits installations where an operator can drain the bowl on a schedule, while automatic and differential-pressure drain variants suit unattended positions. The standard element is 40 um; specify the W option for 5 um filtration where downstream equipment needs finer air. The embedded square gauge on this unit reads in MPa, and psi or bar scales are available instead if preferred. PT is the standard thread for the series, with G and NPT as order options - this unit is specified in NPT. A mounting bracket can be ordered on variants that include one; this configuration has no bracket. Because flow in this series is published as curves rather than a single rated figure, send us your application details 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 the GFR series as characteristic curves rather than a single rated figure, so we do not quote a rated flow, Cv or SCFM number for this unit. Send us your line pressure, port size and the air demand of your equipment, and we will confirm the flow figures from the datasheet so you can size the unit correctly before ordering.
The M in the code specifies a manual drain: the metal bowl is emptied by hand as part of routine maintenance, which suits positions an operator visits regularly. This unit is also the low-pressure type of the GFR300, intended for circuits regulated at reduced pressures; the exact adjustment range for this variant is not published in the material we hold, so we will confirm it from the datasheet on request.
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.