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 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 GFR300-10 is an AirTAC filter regulator: water and particulate filtration plus pressure regulation combined in one body. This configuration has a 3/8 in NPT port, the finer 5 um filter element, an automatic drain that expels collected condensate without daily attention, a round pressure gauge scaled in MPa, and a reverse/check valve fitted. The polycarbonate bowl suits non-freezing compressed-air service from -5 to 70 C, and a mounting bracket is included.
This is a genuine AirTAC part. The GFR family is published in sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and with drain, filter-grade, gauge, thread and bracket options to match your installation. Maximum inlet pressure is 1.0 MPa (145 psi) and the regulating range for this automatic-drain type is 0.15-0.9 MPa (20-130 psi). Flow is published as curves rather than a single rating, so ask us to confirm sizing figures from the datasheet before ordering.
| 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 | 0.15 - 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, MPa 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. |
|---|---|
| 10 | Port size PT3/8". 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. |
| 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. |
| 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 · PT3/8" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
Point-of-use conditioning for a CNC machining center: the 5 um element protects solenoid valves on the tool changer and clamping circuits, while the regulator holds a steady set pressure downstream.
Conditioning the air feeding pneumatic cylinders and grippers on a carton packaging line; the automatic drain keeps condensate out of the circuit through continuous shifts without operator attention.
A compact filter-regulator at the air drop feeding an assembly cell's impact tools and air cylinders, with the check valve holding downstream pressure if the main supply dips.
Every choice on this family is decodable from the code. Step size first: 200, 300, 400 or 600 sets the port (3/8 in here) and should be matched to the flow your line needs. Choose the drain: differential-pressure (default), automatic (fitted here) or manual. Choose the element: 40 um standard or 5 um (code W) as fitted on this unit. Gauges: an embedded square gauge is standard, an external round gauge (this unit) is optional, scaled in MPa, psi or bar. Thread: PT is the standard; G (BSPP) and NPT (this unit) are order options. Brackets are optional across the family and included here.
Flow is published as curves, not a single rated figure, so send us your application and we will confirm sizing from the datasheet before you order.
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 this family as curves rather than a single rated figure, so we do not quote a number here. Send us your flow requirement and we will confirm sizing from the datasheet on request.
The 40 um element is the standard grade and suits general plant air; the 5 um grade (code W) fitted here is the finer option for sensitive valves and instruments. The automatic drain (code A) discharges collected condensate without daily manual draining; manual and differential-pressure drains are available on other variants.
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.