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 size-300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration has 1/2 inch NPT ports, a manual drain bowl in polycarbonate, a 40 um standard filter element, a built-in reverse/check valve that holds downstream pressure when the supply is lost, and an included mounting bracket. No gauge is fitted, so add one separately if you want a visual pressure reading. With a manual drain, an operator opens the drain valve by hand to expel collected condensate, which suits installations visited during routine checks. Maximum inlet pressure is 1.0 MPa (145 psi), the standard regulator adjustment range with manual drain is 0.05-0.9 MPa (7-130 psi), and the working temperature range is -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, a choice of PT, G or NPT thread, differential-pressure, automatic or manual drains, an optional 5 um element, and optional gauges. Flow figures for this series are published as curves rather than a single rating, so contact us and we will confirm the 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 | Not fitted |
| 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. |
| 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. |
| 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) |
Clean, regulated air feeding solenoid valves and air-assisted tool changes on a CNC cell, with the check valve holding the downstream circuit if the shop supply drops.
Conditioned air for carton-forming and sealing cylinders on a packaging line, where the manual drain suits a machine checked at each shift start.
A filtered, regulated branch off the main header serving pneumatic drivers and clamps at assembly benches, with the bracket mounting the unit at the drop point.
Size 300 with 1/2 inch ports sits mid-range in the GFR line: step up to 400 or 600 for larger air demand, or down to 200 for compact circuits. Choose the drain to match maintenance practice: manual (this unit) needs a hands-on drain visit, automatic drains on a schedule of its own, and the differential-pressure default drains when the pressure drop across the element rises. The 40 um element is the standard grade; specify the W option for 5 um where finer filtration is needed. This unit ships without a gauge, so plan an external round gauge in the scale you prefer (MPa, psi or bar) if a reading is required. The T in the code specifies NPT thread; PT is the catalogue standard and G (BSPP) is also available to order. A mounting bracket is included. Because flow is published as curves rather than a single rated figure, ask us to confirm sizing against your air demand before ordering.
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 we do not quote a figure here. Tell us your air demand and operating pressure and we will confirm the datasheet flow figures for this size-300 unit on request.
The M in the code selects a manual drain: condensate collected in the polycarbonate bowl is released by hand, which suits installations checked on a routine schedule. The N means no gauge is fitted, so add an external round gauge in MPa, psi or bar if you need a pressure reading.
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.