The AirTAC GFR300-15MLNT 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 PT1/2" ports, a manual drain and regulates 0.05 - 0.9 MPa (7 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The AirTAC GFR300-15MLNT is a filter regulator: water and particulate removal plus downstream pressure regulation in a single 300-size body. This unit is ordered with a 1/2 in NPT port, a manual drain bowl in polycarbonate, and standard 40 um filtration. It is the low-pressure type, is supplied without a gauge, and includes a mounting bracket. 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 is published in sizes 200, 300, 400 and 600, with port options in PT as standard and G or NPT to order, drain choices of differential-pressure, automatic or manual, an optional 5 um (W) filter grade, and gauge or no-gauge variants. Because flow is published as curves rather than a single rating, we confirm the datasheet and flow figures for your application on request.
| Model | GFR300-15MLNT AirTAC Filter Regulator NPT1/2 Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (NPT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 130 psi) |
| Pressure type | Low-pressure 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 | Manual drain |
| Bowl material | PC |
| Pressure gauge | Not fitted |
| 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. The low-pressure type adjusts over a lower band than standard; we confirm the exact figures from the factory datasheet. 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. |
|---|---|
| 15 | Port size PT1/2". This body offers 08 = PT1/4", 10 = PT3/8", 15 = PT1/2". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 130 psi)). |
| L | Low-pressure type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| N | No pressure gauge (N). |
| (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. |
| T | NPT 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 · PT1/2" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
Feeds the regulated supply to carton-forming and sealing stations on a packaging line, where clean, moisture-reduced air at a stable low setting keeps cylinders and grippers cycling predictably.
Installed ahead of directional valves on a fixture-clamping manifold, providing filtered air and a set downstream pressure that the clamp cylinders hold for the duration of the machining cycle.
Prepares the air feeding diverters, stops and pusher cylinders along a sorting conveyor, removing water and pipe scale upstream of the valves that position product between lanes.
Start with the port step: this configuration is 300 size with a 1/2 in NPT port, so match it against the air demand of the circuit - larger sizes carry larger ports and more flow capacity. Choose the drain to suit access: this unit has a manual drain, which suits positions an operator visits routinely; automatic or differential-pressure drain variants suit less accessible points. Filtration is 40 um as ordered; specify the W code for 5 um where finer pre-filtration is needed. A gauge can be added on variants that carry one, with square or round styles and MPa, psi or bar scales; this unit is ordered without one. Thread is NPT here, with PT standard and G available. The low-pressure regulator type is selected for circuits that sit below standard setting ranges - its exact range is not published in the catalogue, so ask us to confirm it against your setpoint before ordering. Flow is published as curves, not a single rating, so send us your application and we will confirm sizing 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 curves, not as a single rated figure, so we do not quote a number here. Tell us your application and required flow, and we will confirm the datasheet curve and sizing for this 300-size, 1/2 in NPT unit on request before you order.
This unit is ordered with a manual drain: condensate collected in the polycarbonate bowl is released by operating the drain by hand, which suits installations an operator visits routinely. If the unit will sit in an inaccessible position, ask about the automatic or differential-pressure drain variants of the same size instead.
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.