The AirTAC GFR300-15T AirTAC Filter Regulator NPT1/2 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 is a 300-size filter regulator that removes water and particulate from compressed air and holds downstream pressure steady in one body. This configuration has a 1/2 in NPT port, the standard 40 um filter element, a manual drain bowl in PC (polycarbonate), a round pressure gauge with MPa scale, a reverse/check valve, and the mounting bracket included. The manual drain means an operator opens the bowl drain to discharge collected condensate, which suits installations visited on a regular maintenance round.
This is a genuine AirTAC part. The GFR series is available in sizes 200, 300, 400 and 600 with a choice of PT, G (BSPP) or NPT threads, differential-pressure, automatic or manual drains, 40 um or 5 um (W) filtration, gauge style and scale, and a low-pressure regulator type. Flow is published as curves rather than a single rated figure, so we confirm the exact datasheet figures for your application on request.
| Model | GFR300-15T AirTAC Filter Regulator NPT1/2 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 | Fitted (reverse flow permitted) |
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. |
| K | Reverse-flow (reflux) valve fitted. |
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) |
Feeding a clean, regulated air supply to a workshop air main or drop, with the manual drain emptied during scheduled rounds and the MPa gauge giving a local pressure readout at the drop.
Conditioning the air feeding carton sealers and wrapping lines, where water and debris must be stripped out and cylinder pressure held constant for consistent jaw and belt actuation.
Supplying filtered, regulated air to solenoid-valve manifolds and actuators on process skids, with the check valve holding the downstream setting if supply pressure dips.
Sizing starts with the port and size step: this unit is GFR300 with a 1/2 in NPT port, one step above the 1/4 in and 3/8 in 300-size options and below the 400 and 600 sizes - match the step to the air consumption of the machine it feeds, and we will confirm the flow curve against your demand before you order. Drain choice matters: manual drain (this unit) needs periodic operator attention, while automatic and differential-pressure drains discharge condensate without it. The standard element is 40 um; specify W for 5 um where finer pre-filtration is needed. The gauge here is the external round type with MPa scale; square embedded gauges and psi or bar scales are alternatives. Thread is NPT on this code, with PT and G (BSPP) available to order, and the bracket is included.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. The reflux valve permits reverse flow 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 number, so there is no one figure we can quote. Send us your air consumption and line pressure and we will confirm the flow curve and sizing for the GFR300-15T from the datasheet before you order.
The M in this code means the bowl has a manual drain: an operator opens it to discharge collected water. It is the right choice where the unit is checked on a regular maintenance schedule. If the installation is unattended or hard to reach, an automatic or differential-pressure drain version removes that task.
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.