The AirTAC GFR300C15LJNT AirTAC Filter Regulator NPT1/2 Low-Pressure 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 GFR300C15LJNT is a GFR-series filter regulator: it removes water and particulate from compressed air and holds downstream pressure at a set point in one combined body. This configuration is built around 1/2 in NPT ports, a 40 um standard filtration element and a differential-pressure drain that clears collected condensate as air flows through. The regulator section is the low-pressure type, intended for circuits that operate below standard line pressure. No gauge is fitted, no mounting bracket is included, and the bowl is metal.
This is a genuine AirTAC part from the GFR300 size within a family that spans sizes 200, 300, 400 and 600, with port options from 1/8 to 1 in, PT/G/NPT thread choices, manual or automatic drain variants, a 5 um (W) filtration option and gauge-equipped variants across the range. Because AirTAC publishes flow for this family as curves rather than a single rated figure, we confirm the datasheet and sizing figures for your application on request.
| Model | GFR300C15LJNT AirTAC Filter Regulator NPT1/2 Low-Pressure |
|---|---|
| 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) |
Air preparation for pneumatic clamps and workholding fixtures on a machining cell that are specified to hold at reduced pressure rather than full line pressure; the low-pressure regulator type matches circuits designed below the standard range while the 40 um element protects the clamping valves.
Filtered, regulated air for sealing jaws and actuation cylinders on a packaging line, with the 40 um element keeping particulate out of directional valves and the differential-pressure drain clearing condensate continuously during production runs.
A bench or pilot-plant air drop feeding low-pressure pneumatic controls and sample-handling actuators, where filtered air and a stable reduced set point protect sensitive downstream instruments and fittings.
Size and port step up together: sizes 200, 300, 400 and 600 map to larger ports from 1/8 to 1 in, and this unit sits at the 1/2 in NPT position (PT is the standard thread; G and NPT are order options). Where a bowl is fitted you can choose differential-pressure drainage (as on this model), automatic (A) or manual (M), and filtration is 40 um standard with 5 um (W) as the option. Regulator variants can be supplied with an embedded square gauge or an external round gauge in MPa, psi or bar scales, and brackets are optional - this code carries neither a gauge nor a bracket. Because AirTAC publishes flow as curves rather than 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 family as curves rather than a single rated figure, so we do not quote a rated flow number. Send us your application details and we will confirm the flow and sizing figures from the datasheet on request.
The N in the code means no gauge is fitted on this unit. Across the GFR range you can order variants with an embedded square gauge or an external round gauge in MPa, psi or bar scales - tell us if you need a gauge-equipped version instead.
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.