The AirTAC GFR300-15T AirTAC Filter Regulator, NPT 1/2 in, 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 differential-pressure drain and regulates 0.15 - 0.9 MPa (20 - 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 filter regulator: water and particulate removal and pressure regulation combined in a single body. This size 300 unit is configured with 1/2 in NPT ports, a 5 um filter element (the finer of the two available grades), a differential-pressure drain that bleeds collected condensate automatically whenever the pressure differential across the element rises, an external round pressure gauge scaled in MPa, a built-in reverse/check valve that holds downstream pressure when the upstream supply is lost, and a mounting bracket included. The regulator is the standard type with an adjustment range of 0.15-0.9 MPa (20-130 psi), and the unit handles a maximum inlet pressure of 1.0 MPa (145 psi) at temperatures from -5 to 70 C (non-freezing). The polycarbonate bowl lets you see the condensate level at a glance.
This is a genuine AirTAC part. The GFR family is published in sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 in, and with options covering drain type (differential-pressure, automatic or manual), filter grade (40 um standard or 5 um), gauge style and scale, reverse/check valve and thread form (PT standard, G or NPT to order). Flow figures for this family are published as curves rather than a single rated number, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GFR300-15T AirTAC Filter Regulator, NPT 1/2 in, 5 um |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (NPT thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 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 | Differential-pressure 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 0.15 - 0.9 MPa (20 - 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". |
| (blank) | Drain: Differential-pressure drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 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. |
| 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. |
| 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" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
Feeding tool-clamp and pallet-change circuits on a machining centre, where the 5 um element keeps fine particulate out of tight-tolerance valves and the regulator holds a steady setting for repeatable clamping.
A filter-regulator point-of-use station on a carton-forming and sealing line, giving each drop its own clean-air supply and a locked pressure setting so sealer cylinders stroke consistently through the shift.
Supplying sortation conveyors' air-operated divertors and stoppers, where the reverse/check valve holds the downstream circuit's pressure during an upstream supply dip so product in flight is not dropped mid-sort.
Work from the port step first: size 300 with 1/2 in NPT ports sits in the middle of the GFR range (200/300/400/600, 1/8 to 1 in), so step up or down a size if your line's flow demand points to a different port. This unit already carries the finer 5 um element; the 40 um standard grade suits general plant air, while 5 um protects downstream valves, cylinders and instruments that tolerate less particulate. Drain choice matters: the differential-pressure drain fitted here needs no daily attention, but an automatic drain (code A) or a manual drain (code M) is available if your maintenance routine prefers either. The round MPa gauge fitted here can alternatively be ordered as the embedded square gauge, and in psi or bar scales. Thread is NPT on this unit; PT is the catalogue standard and G (BSPP) is also orderable. A mounting bracket is included.
On sizing: AirTAC publishes flow for this family as curves, not as a single rated figure, so we cannot honestly quote one number here. Send us your application's flow and pressure requirements and we will confirm the correct size against the datasheet before you order.
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 family as curves rather than a single rated number, so we do not quote a figure here. Tell us your application's flow and working pressure and we will confirm against the datasheet whether the size 300 / 1/2 in unit is correctly sized before you order.
The W in the code selects the optional 5 um element over the 40 um standard grade, the finer choice for protecting sensitive downstream valves and instruments. The K code adds a reverse/check valve, which holds downstream pressure if the upstream supply is interrupted. Both are order-time options on the GFR300 series.
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.