The AirTAC GFR300-15T AirTAC Filter Regulator NPT1/2 Low-Pressure 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 regulates downstream pressure in a single body. This configuration is built with a 1/2 in NPT port, a manual drain bowl in polycarbonate, a 40 um standard filter element, and the low-pressure regulator type. It is supplied with a round pressure gauge reading in bar, and no mounting bracket is included. The manual drain means an operator opens the bowl drain by hand to expel collected condensate, which suits installations visited on a regular maintenance round.
This is a genuine AirTAC part. The GFR300 series is one of four sizes (200, 300, 400, 600) with port options from 1/8 in to 1 in, PT as the standard thread and G or NPT as order options, plus choices of drain type, 40 um or 5 um filtration, gauge style and scale. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application.
| Model | GFR300-15T AirTAC Filter Regulator NPT1/2 Low-Pressure |
|---|---|
| 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 | Low-pressure 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. The low-pressure type adjusts over a lower band than standard; we confirm the exact figures from the factory datasheet. 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)). |
| L | Low-pressure type. Blank is standard, L is the low-pressure type. |
| J | Supplied without bracket. |
| (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. |
| (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) |
Feeds filtered, regulated air to pneumatic clamps that hold workpieces on a CNC fixture, where the low-pressure regulator type keeps holding force gentle enough for finished surfaces and the 40 um element protects the clamp valves.
Mounted at the drop of a carton-sealing or wrapping line, it strips water and pipe scale before the machine's air valves and holds a steady reduced pressure so sealing cylinders cycle consistently through the shift.
Conditions the air supply to benchtop test rigs and pilot-scale process instruments, delivering clean, low-pressure air at a stable setting, with the bar-scale gauge giving operators a direct local readout.
Size the unit by stepping up or down the 200/300/400/600 range against the flow your line needs - the 300 size carries a 1/2 in port in this configuration, and larger sizes move more air at larger ports. Because flow is published as curves and not a single rating, ask us to confirm sizing against your application before ordering. The low-pressure regulator type in this code covers reduced-pressure duties; its exact adjustment range is not published in the material we hold, so confirm it with us. This unit uses a manual drain - choose it when a maintenance visit is routine, or ask about automatic and differential-pressure drain alternatives if the unit will run unattended. Filtration is the 40 um standard element; a 5 um element is available under code W if finer particulate removal is needed. The gauge fitted here is the round type with a bar scale; embedded square gauges and MPa or psi scales are the other catalogue choices. Thread is NPT in this code, with PT standard and G (BSPP) available to order, and a mounting bracket can be added if this J-coded, no-bracket unit needs 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 this series as curves rather than a single rated figure, so we do not quote a number here. Tell us your line's air demand and working pressure and we will confirm the datasheet curve and check the sizing against your application before you order.
The M in this code specifies a manual drain: condensate collecting in the polycarbonate bowl is released by hand, which suits stations visited on a routine maintenance round. If the unit will run unattended, the same series is available with automatic or differential-pressure drain - ask us for those variants.
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.