The AirTAC GFR300-15 AirTAC Filter Regulator G1/2, 5 um, Manual Drain 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 is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one body. This configuration has a G1/2 port, a 5 um filter element (finer than the 40 um standard), a manual drain, a built-in reverse (check) valve and an embedded square gauge reading in psi. The polycarbonate bowl lets you see the condensate level, and the manual drain is emptied by hand during maintenance.
This is a genuine AirTAC part in the GFR300 series, one of four sizes (200/300/400/600) covering ports from 1/8 to 1 inch with PT, G or NPT threads. Maximum inlet pressure is 1.0 MPa (145 psi), the regulated output is adjustable from 0.05 to 0.9 MPa (7-130 psi), and the operating temperature range 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 G1/2, 5 um, Manual Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/2" (G (BSPP) 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 | Fitted — square, 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 0.05 - 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. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| F | Gauge shape: Square. C is round, F is square. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| G | G (BSPP) 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 filtered, regulated air to a pneumatic press or clamping fixture, where the 5 um element protects valves and cylinders and the check valve holds the set pressure if the upstream supply drops.
Supplying diverters, pushers and sealing cylinders on a packaging conveyor line, with the square psi gauge letting operators verify line pressure at a glance and the manual drain cleared during shift checks.
Regulating supply to pick-and-place grippers and end-of-arm tooling, where stable downstream pressure from the GFR300-15 keeps grip force consistent across the cycle.
Choose the size and port step against the air your application consumes: size 300 with a 1/2 inch port sits mid-range in the GFR family, with size 400 as the next step up. This unit is set up for manual draining, which suits attended installations where an operator drains the bowl during routine checks; automatic or differential-pressure drain codes are available for unattended duty. The 5 um element (code W) is the finer option over the 40 um standard. The embedded square gauge reads in psi, and external round gauges with MPa, psi or bar scales are optional. The G thread is a catalogue option to order - PT is the standard thread and NPT is also available. The J code means no mounting bracket is included.
Flow for the GFR300 series 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 flow for the GFR300 series as curves, not a single rated figure, so we do not quote a number here. Send us your application's air consumption and we will confirm the sizing against the datasheet before you order.
K means a reverse (check) valve is fitted: if the upstream supply fails, it holds the pressure you have set downstream instead of letting it escape back through the unit. M means the bowl uses a manual drain, so condensate is emptied by hand during maintenance; automatic and differential-pressure drain versions are available in the same 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.