The AirTAC GFR300C10ALF2G AirTAC Filter Regulator G3/8 Low-Pressure 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 See datasheet ports, a differential-pressure 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 GFR300C10ALF2G is an AirTAC GFR300 filter regulator: water and particulate filtration plus pressure regulation combined in a single 300-size body with a G3/8 (BSPP) port. This configuration carries the 40 um standard filter element, an automatic drain that ejects collected condensate without manual attention, a low-pressure regulator type for circuits that run below standard line pressures, and a fitted square pressure gauge scaled in psi. The polycarbonate bowl is suited to sizes 200-400, a mounting bracket is included, maximum inlet pressure is 1.0 MPa (145 psi), and the operating temperature range is -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, and options include a 5 um element (code W), manual or differential-pressure drains, alternative gauge scales (MPa, psi or bar), an external round gauge, G or NPT threads, and a no-bracket variant. Flow for this series is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GFR300C10ALF2G AirTAC Filter Regulator G3/8 Low-Pressure |
|---|---|
| Series | GFR300 filter regulator |
| Port size | See datasheet (PT thread) |
| Filtering grade | 40 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 | Differential-pressure drain |
| Bowl material | PC |
| Pressure gauge | Fitted — factory standard, Factory standard 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 0.15 - 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. |
|---|---|
| C1 | Port size See datasheet. This body offers 08 = PT1/4", 10 = PT3/8", 15 = PT1/2". |
| (blank) | Drain: Differential-pressure 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). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 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 · See datasheet · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-C1 (two-unit set) |
Filtered, regulated air to swing clamps and vise actuators on a machining centre, with the low-pressure regulator holding a gentle, repeatable clamp force and the automatic drain keeping condensate out of the clamp cylinders.
Feeding paint spray guns in a wood or metal finishing booth, where the 40 um element strips water and pipe scale that would otherwise fish-eye the coating and the regulator sets a steady, low atomising pressure.
Supplying air to diverter gates and pusher cylinders on a bottling or canning conveyor, where the automatic drain copes with moisture carryover from long header runs and the psi gauge lets line staff verify set pressure at a glance.
Start with the port step: this unit is a 300 size with a 3/8 inch port, so match it to your line size and the flow your circuit needs - larger sizes (400, 600) carry more flow if the 3/8 step is marginal. The automatic drain on this model suits unattended duty; choose manual drain where you want positive control of blowdown, or the differential-pressure default where a drop signal should drive draining. The 40 um element is the standard grade; specify the W variant if the 5 um grade is required downstream. The fitted square gauge here reads in psi; MPa and bar scales and an external round gauge are alternatives. Thread is G (BSPP) on this code - PT is the standard thread and G or NPT are catalogue options to order. A bracket is included on this model.
One honest note on sizing: AirTAC publishes flow for this series as curves, not a single rated number, and the exact regulation range of the low-pressure type is not stated as a single figure either. Send us your line pressure, set pressure and air demand and we will confirm the fit from the datasheet before you order.
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 there is no one l/min or SCFM number we can honestly quote for this 300-size, 3/8 inch unit. Send us your line pressure, set pressure and air demand and we will confirm the sizing against the datasheet curves on request before you order.
A is the drain code: this unit has an automatic drain that expels collected condensate from the bowl without anyone opening it, unlike the manual-drain or differential-pressure options in the family. L is the regulator type: this is the low-pressure version, intended for circuits running below standard line pressures; its exact regulation range is not published as a single figure, so we confirm it from the datasheet on request.
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.