The AirTAC GFR300-15T AirTAC Filter Regulator 1/2 in NPT, Manual Drain 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 GFR300-15T combines water and particulate filtration with pressure regulation in a single body. This configuration is a size 300 unit with a 1/2 in NPT port, a manual drain, a 40 um standard filter element, an embedded square gauge scaled in MPa, and no mounting bracket. The manual drain lets you bleed collected condensate by hand on a maintenance schedule, which suits lines that run steadily and are checked regularly.
This 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 PT, G or NPT threads. Maximum inlet pressure is 1.0 MPa (145 psi), the regulating range on this manual-drain version is 0.05-0.9 MPa (7-130 psi), and the operating temperature is -5 to 70 C, non-freezing. AirTAC publishes flow as curves rather than a single rating, so ask us to confirm the datasheet figures for your application.
| Model | GFR300-15T AirTAC Filter Regulator 1/2 in NPT, Manual Drain |
|---|---|
| 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 | 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 | Manual drain |
| Bowl material | PC |
| Pressure gauge | Fitted — square, MPa 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 0.05 - 0.9 MPa (7 - 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. |
|---|---|
| 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)). |
| (blank) | Standard type. Blank is standard, L is the low-pressure type. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. C is round, F is square. |
| 1 | Gauge scale: MPa. 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) |
Clean, regulated air to the directional valve and cylinder circuit of a pneumatic press or clamping fixture, with the set pressure held steady across the shift and condensate bled off at planned maintenance.
Point-of-use filtration and regulation ahead of the valve manifold on a cartoning or wrapping line, protecting downstream control valves from water and particles while supplying the pressure the machine was set up for.
Filtered, regulated air for the stopper, pusher and lift cylinders along a conveyor or sorting line, where a 1/2 in port serves the larger air demand of several actuators on one drop.
Size 300 with a 1/2 in NPT port sits in the middle of the GFR range. Step up to size 400 or 600, or down to size 200, according to the flow your line needs; because flow is published as curves rather than a single rating, ask us to confirm sizing against your application before ordering. Drain type is a real choice on this family: this unit is manual drain, while automatic and differential-pressure drain versions suit installations that cannot be bled on a schedule. The 40 um element is standard and a finer 5 um element (code W) is available. The embedded square gauge reads in MPa; an external round gauge in MPa, psi or bar scales is optional. Thread is NPT on this version, with PT (the standard) and G available as order options. This unit comes without a mounting bracket; a bracket version is available if you need one.
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, so there is no one l/min or SCFM number we can quote. Send us your application details and we will confirm the flow figures from the datasheet for this size 300, 1/2 in NPT unit before you order.
The M in the code means condensate collected in the bowl is released by hand, which suits lines that are checked on a regular maintenance round. If the installation runs unattended or you cannot guarantee manual bleeding, an automatic drain (code A) or differential-pressure drain (blank) version of the same filter regulator is available.
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.