The AirTAC GFR300C10LJC1WTK AirTAC Filter Regulator NPT3/8, 5 um 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 GFR300C10LJC1WTK is an AirTAC GFR-series filter regulator: it removes water and particulate from compressed air and holds a set downstream pressure in one compact body. This unit is built in size 300 with a 3/8 in NPT port, a 5 um filter element (code W) and a differential-pressure drain that bleeds accumulated condensate automatically as the pressure differential across the bowl changes. It is the low-pressure type (code L), fitted with an external round MPa gauge (C1) and a reverse/check valve (K), and supplied without a mounting bracket (J). Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, configurable by drain type, filter grade (40 um standard, 5 um optional), gauge style and scale, thread (PT standard; G and NPT to order), bracket and reverse/check valve. We confirm flow and other datasheet figures on request, since AirTAC publishes flow as curves rather than a single rated figure.
| Model | GFR300C10LJC1WTK AirTAC Filter Regulator NPT3/8, 5 um |
|---|---|
| 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) |
Filtered, regulated air at a low set pressure holds workpieces in CNC fixture clamps. The 5 um element protects the clamping valves from particulate, and the reverse/check valve holds clamp pressure if the shop air supply drops.
On manifolds and actuators that run below standard regulator settings, the low-pressure type is the right tool for the job, and the round MPa gauge lets operators read and verify the set pressure directly at the unit.
Feeding cylinders and air jets on packaging and conveyor lines, the filter and regulator in one body saves panel space, while the differential-pressure drain keeps condensate out of the line without daily manual draining.
Choose the size and port against the air demand of the circuit: this unit is size 300 with a 3/8 in NPT port, and larger sizes carry larger ports and more flow. Filter grade is a real choice - 40 um is the standard element and 5 um (code W, fitted here) gives finer protection for downstream components. Drain type is selectable: differential-pressure (as fitted), automatic (A) or manual (M). Gauge style and scale are selectable too - embedded square gauge standard, external round gauge optional, with MPa, psi or bar scales; this unit carries a round MPa gauge. Thread is PT as standard with G (BSPP) and NPT as order options; this unit is NPT. A reverse/check valve (K, fitted) holds downstream pressure on air-off, and the bracket can be deleted (J) or included.
The low-pressure type (L) is intended for lower set pressures than the standard version; its exact regulation range is not published, so ask us to confirm it against your set point. Flow for the GFR series is published as curves, not a single rating - 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 GFR series as curves rather than a single rated figure, so we do not quote a number here. Send us your air demand and line pressure and we will confirm the correct size and the flow figures from the datasheet on request.
L marks the low-pressure regulator type, intended for lower set pressures than the standard version. The exact regulation range for this type is not published in the catalogue data we hold, so we confirm it on request against your set point. The rest of the code decodes as: size 300, 3/8 in NPT port, 5 um element (W), round MPa gauge (C1), no bracket (J), NPT thread (T) and reverse/check valve (K).
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.