The AirTAC GFR300C10MLF3WTK AirTAC Filter Regulator NPT3/8 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 GFR300C10MLF3WTK is a size-300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is built for a 3/8 in NPT port, carries a fine 5 um filter element, and drains collected condensate by hand through its manual drain - a good fit where you want positive control over when the bowl is emptied. The regulator is the low-pressure type, and the unit comes with an embedded square gauge scaled in bar, a reverse/check valve fitted, a mounting bracket included, and a metal bowl. 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. The GFR family is available in sizes 200, 300, 400 and 600 with a choice of ports, threads (PT standard, G and NPT as order options), drain types, filter grades (40 um standard, 5 um optional), gauge scales and regulator types. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet and sizing figures for your application on request.
| Model | GFR300C10MLF3WTK AirTAC Filter Regulator NPT3/8 |
|---|---|
| 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) |
On a CNC fixture line where clamps must close at a controlled, lower-than-standard supply pressure, the low-pressure regulator holds the clamp circuit steady while the 5 um element keeps dirt out of the clamp cylinders and the check valve holds the set pressure if upstream supply dips.
Feeding a valve manifold on a cartoning or wrapping machine, this unit filters moisture and fine particles before the valves and lets a technician set the machine's working pressure at the bar-scaled square gauge, with the manual drain emptied during scheduled changeovers.
On a lab test bench running instruments and small air actuators at reduced pressure, the low-pressure regulator gives fine control at the bench, the 5 um grade protects sensitive components, and the 3/8 in NPT port ties straight into standard NPT rig pipework.
Start with the port step: this unit is size 300 with a 3/8 in NPT port; smaller and larger sizes (200/400/600) step the port and flow capacity up or down, so match the size to the air demand of the circuit. The 5 um element in this code is the finer of the two published grades (40 um is the standard); choose 5 um where downstream valves and cylinders need cleaner air. The manual drain here means an operator empties the bowl - pick the automatic or differential-pressure drain codes instead if you cannot guarantee regular drain checks. The square gauge is scaled in bar; MPa and psi scales and an external round gauge are alternatives. Thread is NPT in this code, with PT as the AirTAC standard and G (BSPP) available to order; a bracket is included. The low-pressure regulator type is the right choice for circuits running well below standard supply pressures - confirm the exact adjustment range with us before ordering. Because flow is published as curves and not a single rating, send us your application details and we will confirm sizing against the datasheet.
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 this family as curves rather than a single rated figure, so we do not quote a number. Tell us your application and required flow, and we will confirm the sizing against the datasheet on request before you order.
The M in the code selects the manual drain: condensate collected in the metal bowl is emptied by hand, which suits stations that are checked regularly. The W in the code selects the 5 um filter element, the finer of the two published grades (40 um is standard), for cleaner air to downstream valves and cylinders.
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.