The AirTAC GFR300C10MLJC2WTK AirTAC Filter Regulator NPT3/8 5um 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 GFR300C10MLJC2WTK is a 300-size 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 the fine 5 um filtration element (code W) instead of the standard 40 um, and uses a manual drain, so an operator opens the bowl drain to discharge collected condensate. It is the low-pressure regulator type, suited to circuits that run below standard set pressures, and it ships with an external round gauge scaled in psi plus an integral reverse (check) valve that holds downstream pressure if the supply drops. No mounting bracket is included with this code. 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 is available in sizes 200, 300, 400 and 600 with a choice of port sizes, PT, G or NPT threads, manual, automatic or differential-pressure drains, 40 um or 5 um elements, gauge style and scale, and optional brackets. Flow is published by AirTAC as curves rather than a single rated figure, so we confirm the datasheet and sizing figures for your application on request.
| Model | GFR300C10MLJC2WTK AirTAC Filter Regulator NPT3/8 5um |
|---|---|
| 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 leak or functional test bench running below standard shop pressure, the low-pressure regulator type lets the operator dial in a reduced set point while the 5 um element keeps fine debris out of gauges and test couplings.
Feeding a small press or clamp cylinder, the unit filters condensed water and particles from the shop air, holds a steady regulated supply through the check valve, and the psi gauge gives the operator a direct pressure readout.
On a packaging line with air cylinders and diverters along a 3/8 in trunk, this filter regulator cleans the air, sets the working pressure for the actuators, and the manual drain lets maintenance purge condensate at each shift check.
Start with the port step: this unit is the 300 size with a 3/8 in NPT port, so match it to your line size and let the flow curve - not a single rating - decide whether 300 is the right step for your demand. Choose the drain to suit attendance: manual (this code) needs an operator to drain the bowl, while automatic and differential-pressure drains discharge on their own. This code carries the 5 um element (W) for finer particulate control; the 40 um standard element is the choice where only coarse protection is needed. The gauge here is the external round type scaled in psi; embedded square gauges and MPa or bar scales are alternatives. The trailing T sets the NPT thread, with PT and G available as order options, and J means no bracket - add one if you mount away from the wall. Because AirTAC publishes flow only as curves, ask us to confirm sizing against your application 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 GFR300 series as curves, not as a single rated number, so there is no one figure we can honestly quote. Send us your line pressure and air demand and we will confirm the sizing from the datasheet on request.
The M in the code selects a manual drain: condensate collected in the bowl is released by opening the drain by hand, which suits attended installations. The K code adds a reverse (check) valve, which holds downstream pressure if the upstream supply is interrupted.
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.