The AirTAC GFR300-15T AirTAC Filter Regulator 1/2" NPT 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 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: one body that removes water and particulate from compressed air and sets a stable downstream pressure. This 300-size unit is fitted with a 1/2 in NPT port, the standard 40 um filter element, and a differential-pressure drain that bleeds condensate automatically whenever the pressure drop across the element is high enough. The regulator is the standard type with a setting range of 0.15-0.9 MPa (20-130 psi), and this configuration carries the external round gauge with a psi scale. The polycarbonate bowl suits the -5 to 70 C (non-freezing) operating range, and the mounting bracket is included.
This is a genuine AirTAC part. The GFR line spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, thread options PT, G and NPT, manual or automatic drain choices, a 5 um element option, and gauge or no-gauge variants. Flow figures are published as curves rather than a single rating, so ask us to confirm the datasheet for your application before ordering.
| Model | GFR300-15T AirTAC Filter Regulator 1/2" NPT |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (NPT thread) |
| Filtering grade | 40 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, psi 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. 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. |
| 2 | Gauge scale: psi. 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) |
Point-of-use filtration and pressure setting for the air feeding clamps, tool changers and actuator circuits on a machining centre, with the psi gauge giving operators a direct local readout.
Cleaning shop air and holding a steady pressure to the cylinders that drive carton erecting, sealing and pusher stations, so stroke timing stays consistent across the shift.
A filter regulator at each work-station drop in a factory air ring main, protecting downstream valves and cylinders from water and scale while letting each station run at its own set pressure.
Size up by required flow and port: this 300-size unit takes a 1/2 in NPT connection; larger sizes carry larger ports and more flow. Choose the drain to match maintenance practice - differential-pressure (this unit) bleeds on pressure drop, automatic drains continuously, and manual requires a scheduled drain. The standard element is 40 um; specify the W option for 5 um where finer filtration is needed. Gauge scale (MPa, psi or bar), thread (PT, G or NPT), and bracket choice are all decodable from the code. Flow is published as curves, not a single rated figure, so send us your application details and we will confirm sizing against the datasheet 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 series as curves rather than a single rated figure, so we do not quote a number here. Tell us your application and we will confirm the flow figures from the datasheet on request before you order.
This configuration has the differential-pressure drain, which discharges condensate automatically when the pressure drop across the 40 um element rises - no daily manual draining. If your maintenance routine prefers it, GFR300 units are also available with an automatic (code A) or manual (code M) drain.
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.