The AirTAC GFR300-15T AirTAC Filter Regulator NPT1/2, 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 300-size filter regulator that removes water and particulate from compressed air and sets downstream pressure in a single body. This configuration has 1/2 in NPT ports, a 5 um filter element (the finer of the two catalogue grades), a differential-pressure drain that bleeds collected condensate automatically whenever the pressure differential across the element rises, and a round pressure gauge reading in bar. A reverse/check valve is fitted to hold the set downstream pressure if the supply is interrupted, and the unit is supplied without a mounting bracket. Maximum inlet pressure is 1.0 MPa (145 psi), the regulator adjusts from 0.15-0.9 MPa (20-130 psi), and the working temperature range is -5 to 70 C (non-freezing). The polycarbonate bowl is standard at this size.
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with a choice of port sizes, PT, G or NPT thread, differential-pressure, automatic or manual drain, 40 um or 5 um filtration, and gauge or no-gauge variants. Flow figures are published as curves rather than a single rating, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GFR300-15T AirTAC Filter Regulator NPT1/2, 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, bar 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. |
| 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. |
| 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 the air cylinder circuit of a small stamping or forming press, where the 5 um element keeps grit out of the valve stack and the regulator holds a steady working pressure stroke to stroke. The check valve keeps the set pressure in the circuit during brief supply dips.
Supplying the diverters, clamp cylinders and seal jaws on a carton or pouch packaging line, where clean, regulated air keeps cycle behaviour consistent through a shift and the differential-pressure drain copes with condensate without operator attention.
Conditioning the air to air-assisted spray or coating equipment, where the 5 um grade reduces water and particulate carry-over to the finish and the bar-scale gauge lets operators set and verify atomising pressure at a glance.
Work from the size and port first: the 300 size with 1/2 in NPT ports suits lines whose air consumption sits between the smaller 200/300 ports and the larger 400/600 step - match the port to your existing piping and let us confirm the flow curve against your demand before ordering. Choose the drain next: this unit's differential-pressure drain needs no attention in normal service, while a manual drain (code M) suits installations you inspect routinely and an automatic drain (code A) for unattended duty. Filter grade is a real choice: 40 um is the standard element and 5 um (this unit, code W) protects finer valves and cylinders. Gauge scale is selectable (MPa, psi or bar - this unit is bar), thread can be ordered in PT, G or NPT, and a bracket (code J omits it) is optional. Because flow is published as curves rather than a single rating, send us your application details and we will confirm sizing 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 series as curves, not as a single rated figure, so we do not quote a number that could mislead your sizing. Tell us your line pressure, working pressure and air demand and we will confirm the relevant datasheet curve and figures for this unit on request before you order.
The W in the code selects the 5 um filter grade, the finer of the two catalogue options; the 40 um element is the standard choice where only coarse protection is needed. The K in the code adds a reverse/check valve, which holds the regulated downstream pressure if the upstream supply is interrupted instead of letting it bleed back.
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.