The AirTAC AirTAC GFR300-15T Filter Regulator 1/2 in NPT, 5 um 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 GFR300-15T 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 fitted with a 5 um filtration element (the finer of the two catalogue grades), a manual drain for the polycarbonate bowl, a low-pressure regulator type, and an embedded square gauge reading in MPa. The 1/2 in NPT port suits larger air lines, and a mounting bracket is included; no reverse/check valve is fitted.
This is a genuine AirTAC part from the GFR family, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in and PT, G or NPT threads. Drain, filtration grade, gauge and scale options vary by configuration. Flow is published as curves rather than a single rated figure, so we confirm flow and datasheet figures on request - just ask before ordering.
| Model | AirTAC GFR300-15T Filter Regulator 1/2 in NPT, 5 um |
|---|---|
| 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 | 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 — square, 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. 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. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. C is round, F is square. |
| 1 | Gauge scale: MPa. 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) |
On a carton-sealing or case-packing line, this unit filters the plant air to 5 um and holds a low regulated supply to the clamp and hold-down cylinders, with the square MPa gauge giving operators a direct pressure readout at the machine.
Feeding air knives or blow-off nozzles above a conveyor, the 1/2 in NPT port carries the line volume, the 5 um element keeps fine debris out of the nozzles, and the low-pressure regulator trims the blast pressure to suit the product.
For bench-top analytical or test equipment that needs clean, gently regulated air, the 5 um filtration protects sensitive internals while the low-pressure type and manual-drain bowl suit a supervised lab environment.
Choose the size and port step against the air your line actually consumes: the 300 size with its 1/2 in port sits mid-range in the GFR family, and moving up to 400 or 600 buys more flow capacity at a larger port. Drain type is a real choice here: manual drain means someone opens the bowl drain at intervals, while automatic and differential-pressure drains discharge condensate without operator action. The 5 um element in this unit is the finer option versus the 40 um standard - pick 5 um where downstream valves and cylinders need cleaner air. Gauge scale (MPa, psi or bar) and thread (PT standard, G or NPT to order) are also selectable.
One honest note: AirTAC publishes flow for this family as curves, not a single rated number, and the exact regulation range of the low-pressure type is not stated on the sheet we work from. Ask us to confirm sizing and the regulation range against your application before you order.
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 family 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 flow from the datasheet curves on request before you order.
The M in the code selects a manual drain on the polycarbonate bowl: condensate collects in the bowl and someone opens the drain at intervals to let it out. If you would rather not rely on operator action, the same 300-size filter regulator is available with an automatic or differential-pressure drain - ask us for those configurations.
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.