The AirTAC GFR300C10MLC2WK 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 GFR300C10MLC2WK is a size 300 filter regulator: water and particulate filtration plus pressure regulation combined in a single body. This configuration is the low-pressure type, fitted with a 5 um filter element (code W) for finer air cleaning than the standard 40 um grade, a manual drain (code M) so the bowl is emptied by hand, a round external gauge reading in psi (code C2), and a reverse/check valve (code K) on the regulated outlet. The connection is a PT3/8 (3/8 in) port with PT thread as the standard, the bowl is metal, and a mounting bracket is included. Maximum working (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 from the GFR filter-regulator family, which spans sizes 200, 300, 400 and 600 with progressively larger ports and flow capacity. Across the family you can order different drain types, the 40 um or 5 um filter grade, gauge style and scale, G or NPT thread options, and standard or low-pressure regulation. AirTAC publishes flow for this series as curves rather than a single rated figure, so we confirm the exact flow and datasheet figures for your application on request.
| Model | GFR300C10MLC2WK 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) |
Feeding glue heads, spray nozzles or coating guns that run at a low regulated setting. The 5 um element helps keep water and particulate out of fine orifices, while the round psi gauge lets an operator read the setting directly at the machine.
Regulating supply to clamping fixtures and workholding jigs that hold at a low, stable pressure. The filter and regulator in one body saves panel space, and the reverse/check valve helps hold the downstream setting if upstream supply dips.
A point-of-use air drop on a packaging or filling machine, where one unit both cleans the air and sets the pressure for actuators and small cylinders. The manual drain suits a drop an operator passes during shift checks, and the included bracket simplifies mounting.
Start with the size and port: this unit is size 300 with a PT3/8 port, one step up from the 200 series, so check it against the pipe size and air demand of your circuit. Because this is the low-pressure type, it is intended for circuits regulated well below the standard range; the exact adjustment range for the low-pressure version is not published, so ask us to confirm it against the datasheet before ordering. The 5 um element (code W) suits applications needing cleaner air than the standard 40 um grade; choose manual drain (as here) where someone can bleed the bowl routinely, or ask about automatic or differential-pressure drain versions if the unit is hard to reach. The round psi gauge (code C2) gives a direct readout in US units; embedded square gauges with MPa/psi/bar scales are also available. PT is the standard thread, with G (BSPP) and NPT as orderable options, and the bracket is included.
One honest routing note: AirTAC publishes flow for the GFR300 series only as curves, not as a single rated number, so we do not quote a flow figure here. Send us your application details and we will confirm sizing against 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 GFR300 series as curves rather than a single rated figure, so we do not quote a number here. The honest way to size it is against the curve for your inlet pressure, regulated setting and allowable pressure drop. Send us your application details and we will confirm the flow and the full datasheet figures on request before you order.
The M in the code specifies a manual drain: condensate collected in the metal bowl is emptied by hand, which suits a unit mounted where an operator can reach it. If the unit will be inaccessible, ask us about automatic or differential-pressure drain versions of the same size. The C in the code also marks this as the low-pressure regulator type, intended for circuits regulated well below the standard range; its exact adjustment range is not published, so we will 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.