The AirTAC GFR300-15 AirTAC Filter Regulator NPT1/2 Auto Drain 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 automatic 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 GFR300-15 is a size 300 filter regulator: it removes water and particulate from compressed air and holds downstream pressure in a single body. This configuration has 1/2 in NPT ports, an automatic drain that ejects collected condensate without manual attention, a 40 um standard filter element, and a round pressure gauge reading in psi. A reverse/check valve is fitted and a mounting bracket is included.
It is a genuine AirTAC part from the GFR range, offered in sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 in and PT, G or NPT threads to order. Maximum inlet pressure is 1.0 MPa (145 psi) and working temperature is -5 to 70 C, non-freezing. Flow is published as curves rather than a single rating, so we confirm datasheet figures on request.
| Model | GFR300-15 AirTAC Filter Regulator NPT1/2 Auto Drain |
|---|---|
| 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 | Automatic drain |
| Bowl material | PC |
| Pressure gauge | Fitted — round, psi 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". |
| A | Drain: Automatic 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. |
| 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" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-15 (two-unit set) |
Clean, regulated air to the press cylinder: the 40 um element strips water and swarf before the valve stack, the regulator holds a steady setting stroke to stroke, and the automatic drain clears condensate between shifts.
Feed spray guns and air-assisted applicators from a single point: particulate and water are removed ahead of the gun, outlet pressure stays where the finish recipe needs it, and the psi round gauge gives operators a visible setpoint.
Supply the sealing jaws, grippers and diverters on a packaging conveyor: the filter regulator keeps air dry and pressure stable for consistent jaw action, while the check valve holds the circuit through brief upstream dips.
Pick the size and port against the flow your line needs: this size 300 unit has 1/2 in NPT ports, with 200, 400 and 600 sizes and PT or G threads available if the application calls for them. Drain choice is automatic (fitted here), manual or differential-pressure; the filter grade is 40 um standard with a 5 um (W) element optional. Gauge scale can be MPa, psi or bar - this unit reads psi on a round gauge - and the fitted reverse/check valve helps hold downstream pressure through supply dips. Flow is published as curves, not a single rating, so ask us to confirm sizing against your application before ordering.
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 G-series flow as performance curves rather than a single rated figure, so there is no one l/min or SCFM number we can quote. Send us your application details and we will confirm the sizing against the datasheet curves on request before you order.
The automatic drain on this GFR300-15 ejects collected condensate on its own, which suits unmanned or hard-to-reach installations. A manual drain is emptied by hand, and the differential-pressure type (the default code) discharges when the pressure differential across the element rises. All three are decodable options across the GFR range.
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.