The AirTAC GFR300C10MLC3WTK 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.
GFR300C10MLC3WTK is an AirTAC GFR300 filter regulator: water and particulate filtration plus pressure regulation in a single body. This configuration carries the 5 um filter element (the finer of the two grades), a manual drain on the metal bowl, a low-pressure regulator, a built-in reverse/check valve, an external round gauge with bar scale, and a 3/8 in NPT port. The low-pressure regulator is intended for circuits that hold a reduced regulated pressure; its exact adjustment range is not published, so ask us to confirm it against your setpoint.
This is a genuine AirTAC part. The GFR family runs in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, PT as the standard thread and G (BSPP) or NPT as order options, plus a choice of drain type, filter grade, gauge style and scale. 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 we confirm sizing and datasheet figures on request before you order.
| Model | GFR300C10MLC3WTK 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) |
Feeds low-pressure pneumatic clamps and fixtures on a CNC machining centre, filtering the shop air to 5 um and holding a reduced regulated pressure while the cycle runs.
Sits at the drop of a packaging conveyor line, cleaning the air and regulating a low working pressure for the cylinders that sort, push and divert cartons.
Provides filtered, reduced-pressure air to positioners and pilot actuators on process valves, with the built-in check valve blocking reverse flow back toward the supply.
The real choices in this family are the size and port step, the drain, the filter grade, the gauge and the thread. Size 300 with a 3/8 in port sits mid-range; step up or down a size when your flow curve demands it - we check the curve against your application. Drain comes as differential-pressure (default), automatic or manual; this unit is manual, so the bowl is emptied by hand on your maintenance schedule. Filter grade is 40 um standard or 5 um with code W - this one carries the 5 um element. Gauge is an embedded square unit as standard with an external round gauge optional in MPa, psi or bar scales; this unit has the round gauge with bar scale. Thread is PT as standard with G and NPT to order - this unit is NPT. A mounting bracket is included. Because flow is published as curves rather than a single rated figure, 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 GFR flow as curves rather than a single rated figure, so we do not quote a number. Send us your application details and we will confirm the flow from the datasheet and check the size 300, 3/8 in port against your demand before you order.
The manual drain means the metal bowl is emptied by hand as part of your maintenance routine - automatic or differential-pressure drain codes are available if you want that handled without operator action. The regulator is the low-pressure type, intended for circuits holding a reduced pressure; its exact adjustment range is not published, so ask us to confirm it against your setpoint.
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.