The AirTAC GFR300C10ALJF2K AirTAC Filter Regulator PT3/8 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 AirTAC GFR300C10ALJF2K is a low-pressure filter regulator: one body that removes water and particulate from compressed air and holds downstream pressure at your setpoint. This 300-size unit is fitted with a PT3/8 (3/8 in) port, an automatic drain that ejects collected condensate without manual attention, a 40 um standard filter element, a metal bowl, an embedded square gauge scaled in psi, and a built-in reverse (check) valve that keeps the downstream setting intact when upstream pressure is lost. No mounting bracket is included on this variant.
This is a genuine AirTAC part from the GFR range, which spans sizes 200, 300, 400 and 600 with port options from 1/8 in to 1 in, a choice of automatic, manual or differential-pressure drains, 40 um or 5 um (W) filtration, and G (BSPP) or NPT thread variants to order. Max inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing). Flow is published as curves rather than a single rating, so ask us to confirm sizing or any datasheet figure against your application before ordering.
| Model | GFR300C10ALJF2K AirTAC Filter Regulator PT3/8 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) |
Feeds clamping fixtures and swing cylinders on a CNC cell where the clamp circuit is deliberately held at a low setpoint; the filter section keeps spool and seal contamination out while the regulator holds the clamp force steady.
Conditions the air feeding divert gates, pushers and bag sealers on a packaging conveyor line; the automatic drain clears condensate through long shifts without an operator, and the check valve holds the setting through upstream dips.
Serves as the point-of-use filter regulator on a compressed-air drop feeding looms and winders, where a stable, lower-than-line pressure is required and the metal bowl with automatic drain handles humid plant air.
Size and port step up together: 200, 300, 400 and 600 cover increasing port sizes and flow capacity, so pick the size whose curve covers your worst-case air demand - we will confirm the curve figures on request. This unit is the low-pressure (L) type, intended where the regulated setpoint sits below the standard regulator's range; the exact adjustment range for the low-pressure type is not published in our sheet, so confirm your setpoint with us first. The automatic drain suits unattended duty; choose manual drain where you want condensate removal under operator control, or differential-pressure drain as the default. Filtration is the 40 um standard element; specify 5 um (code W) if downstream equipment needs finer pre-filtration. The embedded square gauge reads in psi (MPa and bar scales are alternatives), and the fitted check valve protects the downstream setting. PT thread is standard on this code; G (BSPP) and NPT are order options. Brackets are optional on GFR units, and this code ships without one.
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, not as a single rated number, so we do not quote a l/min, m3/h or SCFM figure here. Send us your application's air demand and line conditions and we will confirm the correct size against the datasheet curves on request before you order.
The A in the code sets the automatic drain: collected condensate is expelled from the metal bowl without manual intervention, which suits unattended or hard-to-reach installations. The F2 sets the embedded square gauge scaled in psi (MPa and bar scales are available as alternatives), and K confirms a built-in reverse (check) valve that holds the downstream setting if upstream pressure is lost.
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.