The AirTAC GFR300-15MC3WT AirTAC Filter Regulator NPT1/2 is a genuine G-series filter regulator: water separation, 5 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 GFR300-15MC3WT is a 300-size filter regulator that cleans compressed air and holds downstream pressure in one body. It removes water and particulate through a fine 5 um element (the W grade, one step finer than the 40 um standard) and regulates outlet pressure over 0.05-0.9 MPa (7-130 psi), the manual-drain range. The 15 port is a 1/2 in NPT thread, the manual drain lets you bleed collected condensate on demand, and the fitted round gauge reads in bar so you can set and monitor outlet pressure at a glance. A mounting bracket is included for panel or wall fixing.
This is a genuine AirTAC part from the GFR filter-regulator family, which spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, a choice of manual, automatic or differential-pressure drains, 40 um or 5 um filtration, embedded square or external round gauges, and PT, G or NPT threads. Flow is published as curves rather than a single rating, so we confirm the datasheet and sizing figures for your application on request.
| Model | GFR300-15MC3WT AirTAC Filter Regulator NPT1/2 |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (NPT thread) |
| Filtering grade | 5 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 — round, bar 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. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 3 | Gauge scale: bar. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 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" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
Feeding filtered, pressure-controlled air to a machining centre's pneumatic tool-clamp and chip-clearing circuits, where the 5 um element protects the clamp cylinder's seals and the bar gauge keeps clamp pressure verified at the setpoint.
Conditioning the air that drives conveyor stop-gates and pusher cylinders on a bottling or carton line, combining water and fine-particle removal with a stable regulated pressure so divert timing stays repeatable shift after shift.
Serving as the point-of-use filter regulator on a 1/2 in drop leg feeding an assembly cell, giving operators clean air for air tools and fixtures with a manual drain for the end-of-shift bowl bleed and a bracket for tidy mounting at the bench.
Step up or down the size ladder (200/300/400/600) to match the port and flow your line needs; this 300 unit carries a 1/2 in NPT thread. Choose the drain to suit access: manual (as here) when someone can bleed the bowl on a schedule, automatic where nobody will be round to do it, or differential-pressure as the zero-touch default. Pick 5 um filtration (this unit) when downstream valves, cylinders or instruments need finer air than the 40 um standard, and choose the gauge scale - MPa, psi or bar - to match your plant's convention; this unit carries a round bar gauge. PT is the standard thread, with G (BSPP) and NPT as order options, and a bracket is included. Because flow is published as curves rather than a single rating, 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 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 we will confirm the datasheet flow curve for this 300-size, 1/2 in unit so you can check it against your required flow before ordering.
A manual drain means someone bleeds collected condensate from the bowl on a schedule - simple and reliable where the unit is accessible, while automatic or differential-pressure drains suit unattended installations. The 5 um element (code W) is one step finer than the 40 um standard, giving cleaner air for sensitive valves, cylinders and instruments downstream.
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.