The AirTAC GFR300C15ALJC2WTK AirTAC Filter Regulator NPT1/2 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 GFR300C15ALJC2WTK is an AirTAC GFR300 filter regulator: water and particulate filtration plus pressure regulation combined in a single body, with a drain bowl under the filter element and the regulator above it. This configuration is built for a 1/2 in NPT port and carries a 5 um filter element (the finer of the two published grades), an automatic drain that ejects collected condensate without manual attention, a metal bowl, the low-pressure regulator type, a round pressure gauge reading in psi, and a built-in check valve that holds the regulated downstream side when the upstream supply is interrupted. No mounting bracket is included. 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, and is ordered with your choice of drain type, filter grade, gauge style and scale, thread (PT standard; G and NPT as order options), bracket, and standard or low-pressure regulator type. Flow for this series is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GFR300C15ALJC2WTK AirTAC Filter Regulator NPT1/2 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 bottling or canning line, this unit feeds actuated gate and diverter valves with air filtered to 5 um and regulated at low pressure, while the automatic drain clears condensate between shifts without an operator opening the bowl.
In a lab automation cell, pilot actuators and air tables often run well below main header pressure; the low-pressure regulator type and round psi gauge let a technician set and read the supply level, and the 5 um element protects sensitive pilot circuits.
On a multi-branch pneumatic manifold serving a packaging machine, the built-in check valve holds each branch's regulated pressure if an upstream valve closes, so cylinders and clamps do not sag while other branches stay live.
Choose the size by the port and air demand of your line: this unit is size 300 with a 1/2 in NPT port, and larger sizes step up in port and flow. The 5 um element fitted here suits fine particulate control and protection of sensitive downstream devices; the 40 um standard grade is the economical choice for general upstream protection. The automatic drain suits unattended or hard-to-reach installations; manual and differential-pressure drains can be ordered instead. The round psi gauge is the external gauge option; an embedded square gauge with MPa, psi or bar scale is also available. Thread here is NPT; PT is the standard and G (BSPP) is an order option. This is the low-pressure regulator type and it includes a check valve; the exact adjustment range for the low-pressure type is not published, so confirm it with us. Flow is published as curves, not a single rating - ask us to check the curve 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, not as a single rated figure, so we do not quote a number here. Tell us your line pressure and the air demand of your equipment and we will confirm the flow curve and datasheet for this exact configuration on request before you order.
This unit is the low-pressure regulator variant rather than the standard type, intended where the regulated pressure sits well below the 1.0 MPa (145 psi) maximum inlet. The exact adjustment range for the low-pressure type is not published in the catalogue, so confirm the range with us against your setpoint before ordering.
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.