The AirTAC GFR300-15 NPT AirTAC Filter Regulator 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 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 GFR300-15 NPT is a filter regulator: it removes water and particulate from compressed air and sets a stable downstream pressure in one body. This configuration is the 300 size with a 1/2 in NPT port, fitted with the fine 5 um filtration element (W) instead of the standard 40 um, a manual drain on the bowl, and a standard regulator with an adjustment range of 0.05-0.9 MPa (7-130 psi). No gauge is fitted (code N), so add a gauge separately if you want to read the set pressure at the unit. The polycarbonate bowl carries the manual drain, and a mounting bracket is included. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR filter-regulator line covers sizes 200, 300, 400 and 600 with port sizes from 1/8 in up to 1 in, in PT (standard), G and NPT threads, with a choice of differential-pressure, automatic or manual drain, 40 um or 5 um filtration, gauge options and scale choices. Flow figures for this series are published as curves rather than a single rated number, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GFR300-15 NPT AirTAC Filter Regulator 1/2 in, 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 | 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 | 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. 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. |
| 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 machining centre's fixture-clamping circuit, this unit filters the shop air down to 5 um and holds the clamp pressure set between 0.05 and 0.9 MPa, with the manual drain bled during shift-start checks.
Ahead of the cylinders and actuators on a carton-sealing or wrapping conveyor, the 1/2 in NPT port feeds the line while the fine element keeps wear debris and condensed water out of the valve train.
At a bench or cell drop fed from the main header, this filter regulator gives each station its own filtered, regulated supply, with the bracket securing the unit to the drop frame and the manual drain emptied on schedule.
Start with the port step: the 300 size with a 1/2 in NPT port sits in the middle of the GFR range (200/300/400/600), so step up or down according to the air demand of the circuit - and ask us to confirm sizing against the published flow curves before ordering, since flow is published as curves, not a single rating. Choose the drain: this unit has a manual drain, which suits positions where an operator can bleed the bowl on a routine; pick automatic or differential-pressure drain variants where the unit is hard to reach. This one carries the 5 um element (code W) for finer particulate removal; the standard element is 40 um. No gauge is fitted, so select a gauge and scale (MPa, psi or bar) if the set pressure must be visible at the unit. Thread is NPT here; PT is the standard and G is also available to order. A mounting bracket is included.
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 series as curves, not as a single rated figure, so we do not quote a rated flow number. Send us your application's air demand and we will confirm the relevant datasheet figures on request before you order.
Manual drain means an operator opens the drain on the polycarbonate bowl to expel collected water - there is no automatic mechanism - so the unit should be mounted where it can be reached on a routine. Because this is the manual-drain variant, the regulator adjustment range is 0.05-0.9 MPa (7-130 psi); differential-pressure and automatic-drain variants are specified at 0.15-0.9 MPa (20-130 psi). No gauge is fitted on this code, so order a gauge if you need to read the set pressure.
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.