The AirTAC GFR300-10 AirTAC Filter Regulator NPT 3/8 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 PT3/8" 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 GFR300-10 is a filter regulator: it removes water and particulate from compressed air and sets downstream pressure in a single body. This 300-size unit is fitted with 3/8 in NPT ports, a 5 um filter element (code W) for finer filtration than the standard 40 um grade, a manual drain for the polycarbonate bowl, and an embedded square pressure gauge scaled in MPa. The standard-type regulator covers an adjustment range of 0.05-0.9 MPa (7-130 psi), and the maximum inlet pressure is 1.0 MPa (145 psi). Operating temperature is -5 to 70 C (non-freezing), and a mounting bracket is included.
This is a genuine AirTAC part, distributed by airtacdistr.com for the US market. The GFR family is available in sizes 200, 300, 400 and 600, with port options in PT (standard), G (BSPP) or NPT, a choice of differential-pressure, automatic or manual drain, 40 um or 5 um filtration, gauge scale in MPa, psi or bar, and optional reverse/check valve. Rated flow is published as curves rather than a single figure, so contact us and we will confirm the datasheet figures for your application on request.
| Model | GFR300-10 AirTAC Filter Regulator NPT 3/8 in 5 um |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (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 — square, MPa 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 0.05 - 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. |
|---|---|
| 10 | Port size PT3/8". 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). |
| F | Gauge shape: Square. C is round, F is square. |
| 1 | Gauge scale: MPa. 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 · PT3/8" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
Placed ahead of the machine's pneumatic valves and air bearings, the GFR300-10 strips water and fine particles from the shop-air supply and holds a steady regulated pressure, with the 5 um element protecting sensitive spools and the manual drain cleared during shift checks.
Mounted at the drop of a carton-sealing or wrapping line, this filter regulator conditions the air feeding grippers and cylinders in one body, keeping moisture and debris out of the actuators while the operator sets line pressure at the MPa-scaled square gauge.
Installed at the wall drop feeding spray guns, the unit combines fine 5 um filtration with stable regulated pressure so finish quality is not spoiled by water spotting or pressure drift, and the manual drain is emptied at the start of each coating session.
Size and port: the GFR range steps through sizes 200, 300, 400 and 600, each with larger ports and greater flow capacity - match the size to your line's air demand and pipe bore; this unit is the 300 size with 3/8 in NPT threads. Drain: manual drain suits points where an operator drains the bowl as part of routine checks; automatic or differential-pressure drain is available if the unit sits where regular draining is impractical. Filtration: 5 um (this unit) for finer protection of downstream components, or 40 um for general-duty air. Gauge: embedded square gauge is standard (MPa on this unit), with psi or bar scales and an external round gauge available. Thread: PT is the standard; G (BSPP) and NPT are order options. A mounting bracket is included on this configuration. Because rated flow is published as curves rather than a single rating, 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. 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 GFR300 as performance curves rather than a single rated figure, so we do not quote a number such as l/min or SCFM. Tell us your application and required flow, and we will confirm the datasheet curve figures on request before you order.
Manual drain means an operator opens the bowl drain as part of routine maintenance - straightforward where the unit is accessible and checked regularly; automatic or differential-pressure drain versions suit less accessible points. The W code fits a 5 um element instead of the standard 40 um grade, giving finer filtration for downstream components that need cleaner air.
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.