The AirTAC GFR300C15MJC3WTK AirTAC Filter Regulator NPT1/2 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 GFR300C15MJC3WTK is a size 300 filter regulator: water and particulate filtration plus downstream pressure regulation combined in a single body. This configuration is built around a 1/2 in NPT port, a fine 5 um filter element, a manual drain on the polycarbonate bowl, and a round pressure gauge reading in bar. A built-in check valve (reverse-flow function) lets downstream air pass back through the unit when supply pressure is removed, and the standard regulator covers an adjustment range of 0.05-0.9 MPa (7-130 psi). Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing). No mounting bracket is included on this version.
This is a genuine AirTAC part from the GFR filter-regulator line, which spans sizes 200, 300, 400 and 600 with a choice of ports, drain types, filter grades, gauge styles and thread forms. Flow figures for this series are published as curves rather than a single rating, so contact us and we will confirm the datasheet and sizing figures for your application on request.
| Model | GFR300C15MJC3WTK AirTAC Filter Regulator NPT1/2 |
|---|---|
| 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) |
Feeding a workbench-mounted pneumatic press or clamping fixture: the 5 um element strips water and fine particles from the shop-air drop, and the regulator holds a stable, repeatable setting at the point of use while the check valve vents the circuit safely when supply is shut off.
Supplying cylinders on a packaging or bottling conveyor line: clean, regulated air at the 1/2 in NPT feed keeps gripper and pusher actuators consistent through the shift, with the round bar gauge giving operators a visible setpoint at the machine.
Conditioning air on a laboratory or pilot-plant test rig: the fine 5 um grade protects sensitive instruments and valves downstream, and the manual drain suits intermittent runs where an operator bleeds the bowl between sessions.
Choosing within the GFR line comes down to a few decodable decisions. Match the size and port to the air demand of the circuit: this unit is size 300 with a 1/2 in NPT port, and larger sizes carry larger ports and more flow capacity. Pick the drain: manual (as here, which also widens the regulation range to 0.05-0.9 MPa), automatic, or the differential-pressure default. Pick the filter grade: 40 um standard or 5 um (code W) for finer protection, as fitted here. Choose the gauge style and scale - the embedded square gauge is standard, with an external round gauge optional in MPa, psi or bar scales (this unit carries the round, bar-scale gauge). Thread is PT as standard with G and NPT as order options, and a bracket can be included or omitted (omitted here).
Because flow for this series is published as curves rather than a single rated figure, ask us to confirm sizing against your application before ordering - we will supply the datasheet figures on request.
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 no single flow number can be quoted for this unit. Contact us with your application's air demand and we will confirm the datasheet flow-curve figures and check the sizing for you before you order.
The M in the code specifies a manual drain on the filter bowl: condensate is bled off by hand rather than automatically. On a filter regulator this drain choice also affects the regulation range - the manual-drain version adjusts from 0.05-0.9 MPa (7-130 psi), while automatic and differential-pressure drain versions adjust from 0.15-0.9 MPa (20-130 psi). Choose manual where an operator is present regularly; choose automatic where the unit runs unattended.
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.