The AirTAC GFR300-10 AirTAC Filter Regulator 3/8 in PT, 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 AirTAC GFR300-10 is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single 300-size body with a PT3/8 (3/8 in) port. This configuration has a manual drain, so accumulated condensate is released by opening the drain valve by hand during routine checks. The 40 um standard filter element handles general-purpose air preparation, and the fitted embedded square gauge reads outlet pressure in psi. Maximum inlet pressure is 1.0 MPa (145 psi), the standard regulation range for this manual-drain version is 0.05-0.9 MPa (7-130 psi), and the operating temperature range is -5 to 70 C (non-freezing). The polycarbonate bowl suits the 300 size, and a mounting bracket is included.
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, and with choices of drain type (differential-pressure, automatic or manual), filter grade (40 um standard, 5 um optional), gauge style and scale, thread (PT standard, G and NPT as order options) and bracket. Flow is published as curves rather than a single rated figure, so we confirm the datasheet and sizing figures on request.
| Model | GFR300-10 AirTAC Filter Regulator 3/8 in PT, Manual Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (PT 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 | 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. |
| 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. |
| (blank) | PT 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" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
Feeds a bench-mounted pneumatic press or clamping fixture: the 40 um element keeps machining moisture and pipe scale out of the cylinder valves, while the regulator sets the clamping force line pressure and the psi gauge lets the operator verify the setpoint at a glance.
Conditions the supply to carton sealers and case-erector cylinders on a packaging line, where the manual drain is opened during shift-end checks and the regulator holds a steady working pressure so sealing and transfer motions stay repeatable.
Installed at a 3/8 in drop from a factory air ring main to serve a work cell: it filters the general plant air to 40 um, lets each cell set its own regulated pressure independently of the header, and the included bracket mounts the unit to the cell panel.
Start with the size and port: the 300 size with a 3/8 in PT port is a mid-range step in the GFR line, and the right choice depends on the air demand of the circuit downstream - step up to 400 or 600 for larger lines, down to 200 for compact circuits. Drain type is a real decision: manual drain (as here) suits installations with regular maintenance access, while automatic or differential-pressure drain removes the need to open the bowl by hand. Filter grade is 40 um standard; specify 5 um (code W) where finer particulate removal matters. Gauge scale is selectable (MPa, psi or bar) and an external round gauge is available as an alternative to the embedded square gauge. Thread is PT as standard, with G (BSPP) and NPT as order options; a bracket is included on this unit.
Flow for this family is published as curves, not a single rated number, so ask us to confirm sizing against your application and the datasheet 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 GFR series as curves rather than a single rated figure, so we do not quote a rated flow number. Tell us your application's air demand and we will confirm the sizing against the datasheet curves on request before you order.
The M in GFR30010MF2 specifies a manual drain: condensate collected in the polycarbonate bowl is released by opening the drain valve by hand, which suits installations with routine maintenance access. The GFR family also offers automatic drain (code A) and differential-pressure drain (blank) if you want condensate removal without manual attention.
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.