The AirTAC GFR300-10 AirTAC Filter Regulator 3/8 in NPT, Manual 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 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 GFR300-10 is an AirTAC GFR-series filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single compact body. This unit is the 300 size with a 3/8 in NPT port, manual drain, standard 40 um filtration, a standard regulator with a 0.05-0.9 MPa (7-130 psi) adjustment range, an embedded square gauge reading in psi, and a reverse/check valve fitted. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing). The polycarbonate bowl should be drained by hand as part of routine maintenance.
This is a genuine AirTAC part. The GFR family is published in 200, 300, 400 and 600 sizes with port options from 1/8 in to 1 in, a choice of PT, G or NPT threads, manual, automatic or differential-pressure drains, 40 um or 5 um (W) filtration, gauge scale options, and an optional reverse/check valve. Flow is published as curves rather than a single rated figure, so ask us to confirm datasheet figures for your application on request.
| Model | GFR300-10 AirTAC Filter Regulator 3/8 in NPT, Manual Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (NPT thread) |
| Filtering grade | 40 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. |
|---|---|
| 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. |
| 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 · PT3/8" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
Feeding clean, regulated air to the cylinders and actuators on a carton-forming or wrapping line, with the check valve holding the downstream setting if the plant supply dips during shift changeovers.
Supplying the air cylinders that divert, stop and index product on a conveyor line, where the 40 um filter protects valve spools from water and debris and the psi gauge lets technicians verify setpoints at a glance.
A wall-mounted drop at a maintenance bench or assembly cell, where the manual drain suits a station that is bled down at the end of each shift and the regulator keeps impact wrenches and air tools at a consistent pressure.
Size and port: the 300 size with a 3/8 in NPT port suits lines running at moderate to higher air demand; step up to 400 or 600 if your flow curve requires it, or down to 200 for compact points of use. Drain: this unit has a manual drain, which suits attended installations where an operator can bleed the bowl regularly; choose automatic or differential-pressure drain codes for unattended duty. Filtration: 40 um is standard for general plant air; specify the W code for 5 um where downstream equipment needs finer protection. Gauge: the embedded square gauge on this unit reads in psi; MPa and bar scales are available, and an external round gauge is an option. Thread: PT is the standard; G (BSPP) and NPT are order options - this unit is ordered with NPT. A mounting bracket is included, and the K code adds a reverse/check valve so downstream pressure is held if supply is lost. 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 flow for the GFR series as curves rather than a single rated figure, so we do not quote a rated flow, Cv or SCFM number for this unit. Tell us your application and operating pressure and we will confirm the relevant datasheet flow figures on request before you order.
The M code in GFR30010MF2TK specifies a manual drain: accumulated water in the polycarbonate bowl is released by hand rather than automatically. It suits attended installations on a regular maintenance routine. If your point of use is unattended, ask about the automatic (A) or differential-pressure (blank) drain versions of the same 300-size unit.
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.