The AirTAC GFR300-15T AirTAC Filter Regulator NPT1/2 5um 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 GFR300-15T is a filter regulator: it removes water and particulate from compressed air and holds downstream pressure at your setpoint in one body. This configuration is the 300 size with a 1/2 in NPT port, a fine 5 um filter element (the W grade, tighter than the 40 um standard), a manual drain on the PC bowl, a round external gauge with a bar scale, and a built-in reverse/check valve that holds downstream pressure when the supply is lost. The standard regulator covers an adjustment range of 0.05-0.9 MPa (7-130 psi) with this manual-drain version, and the unit takes a maximum inlet pressure of 1.0 MPa (145 psi) at -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drain, 40 um or 5 um filtration, embedded square or external round gauges with MPa, psi or bar scales, G, NPT or PT threads, and bracket options. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR300-15T AirTAC Filter Regulator NPT1/2 5um Manual Drain |
|---|---|
| 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 | 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 0.05 - 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. |
| (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) |
Feeds clean, regulated air to the tool-clamp cylinders and pallet-clamping actuators on a machining centre, with the 5 um element protecting tight-tolerance spool valves and the check valve holding clamp pressure if the shop supply drops.
Supplies filtered, pressure-set air to the pneumatic cylinders on a carton-taping and case-erecting conveyor, keeping flap-folders and tape heads running at a steady setpoint through a full shift.
Provides moisture- and particle-filtered air at a controlled pressure to purge and actuate enclosed analytical instruments, where the 5 um grade and stable regulation protect sensitive internal components.
Size the GFR by port and flow: the 300 size here carries a 1/2 in NPT port, and the family steps through sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, so pick the size whose flow curve covers your demand. Choose the drain to suit the installation: manual (this unit) needs an operator to drain the bowl, automatic drains on a cycle, and the differential-pressure default drains when the pressure drop builds. Choose the 40 um standard element for general air prep or the 5 um W element, as fitted here, where finer protection matters. Gauge options are the embedded square gauge or an external round gauge with MPa, psi or bar scales; this unit carries a round bar-scale gauge. Thread is PT as standard with G and NPT as order options - this unit is NPT. A bracket is included, and the K code adds a reverse/check valve. Flow is published as curves, not a single rated figure, 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 GFR series as curves, not as a single rated figure, so we do not quote a number. Tell us your application and required flow, and we will confirm the datasheet curve for the GFR300 size against it before you order.
The M code specifies a manual drain: an operator opens the bowl drain to expel collected water, which suits installations checked on a regular maintenance round. With manual drain the regulator adjusts from 0.05-0.9 MPa (7-130 psi). The K code adds a reverse/check valve, which holds downstream pressure if the upstream supply is interrupted.
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.