The AirTAC GFR300-15 NPT1/2 AirTAC Filter Regulator, 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 GFR300-15 is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This 300-size unit is specified with 1/2 in NPT ports, a 40 um standard filter element, a manual drain bowl in polycarbonate, and a round pressure gauge scaled in MPa. The standard regulator covers 0.05-0.9 MPa (7-130 psi), and the bowl is drained by hand, which suits installations where someone checks the equipment routinely.
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600, with port options from 1/8 in to 1 in, PT as the standard thread and G or NPT as order options, automatic or differential-pressure drains, a 5 um element (code W), gauge scale choices, and a low-pressure regulator type where needed. Flow figures are published as curves rather than a single rating, so ask us and we will confirm the datasheet figures for your application.
| Model | GFR300-15 NPT1/2 AirTAC Filter Regulator, 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 — round, 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. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. 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) |
Installed at the drop of a plant air main feeding carton-sealing and wrapping machines, it cleans water and debris from the supply and holds a steady working pressure so downstream valves cycle consistently. The manual drain suits a line checked at each shift.
Mounted ahead of the directional valves that actuate conveyor stops and pushers, it keeps scale and condensate out of the cylinders and lets maintenance set the exact pressure the actuators need. The included bracket fixes it to the machine frame.
Fitted on the 1/2 in branch line serving assembly stations, it delivers filtered air to air tools and clamps while the MPa round gauge gives operators a clear pressure readout at the bench. Manual drain fits a workshop with daily walk-round checks.
Size the GFR series by port and flow: this 300-size unit carries 1/2 in NPT ports; step up to 400 or 600 or down to 200 depending on the air demand of the line. Drain choice matters: manual (this unit) needs routine attention, automatic drains without intervention, and differential-pressure drains bleed only under load. The 40 um element is standard; choose the 5 um W option where finer filtration is required. Gauge scale is selectable (MPa, psi or bar) and the round external gauge on this unit is the alternative to the embedded square type. Thread is NPT here; PT is the catalogue standard and G (BSPP) is also available. A mounting bracket is included.
Because flow is published as curves rather than a single rated figure, 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 one number. Tell us your application and required flow, and we will confirm the datasheet curve figures for the GFR300-15 before you order.
The M in the code GFR30015MC1T specifies a manual drain: the polycarbonate bowl is emptied by hand, which suits equipment checked routinely. The same size is available with an automatic drain (code A) or the differential-pressure drain (blank code) if you prefer unattended operation.
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.