The AirTAC GFR300C15LJF2GK AirTAC Filter Regulator G1/2, 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 GFR300C15LJF2GK is an AirTAC GFR300 filter regulator: water and particulate filtration plus pressure regulation in a single body. This configuration is ported G1/2 (1/2 in, BSPP thread), filters to the standard 40 um grade, and drains condensate by differential pressure, the default drain method for this series. It is the low-pressure regulator type (code L), carries an embedded square gauge reading in psi, includes a reverse (check) valve, and is supplied without a mounting bracket. The bowl is metal. 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 is made in sizes 200, 300, 400 and 600 with a matching port step, and the same unit can be ordered with automatic or manual drainage, the finer 5 um element (code W), a square gauge in MPa, psi or bar scale, an external round gauge, PT, G or NPT threads, and with or without a bracket. AirTAC publishes flow for these units as curves rather than a single rated figure, so send us your application and we will confirm the sizing and datasheet figures on request.
| Model | GFR300C15LJF2GK AirTAC Filter Regulator G1/2, 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) |
Feeds cleaned, pressure-controlled air to clamps and fixtures on a CNC machining cell, where the low-pressure regulator type suits circuits that hold workpieces at moderate settings rather than full line pressure.
Sits at the drop feeding a packaging or bottling line to filter carryover water and scale out of shop air and hold a steady setting for the cylinders that index, divert and seal cartons.
Provides filtered, regulated air to pneumatic valve actuators on a water-treatment or chemical dosing skid, with the fitted reverse (check) valve blocking backflow in the supply line.
The meaningful choices in this code are all decodable. Size 300 with a G1/2 port sits mid-range in the GFR line-up; step down to 200 or up to 400/600 depending on your pipe size and flow demand - we can check the published flow curves against your circuit before you order. Drainage here is differential-pressure, the default; automatic (A) and manual (M) drains are available if your duty needs them. Filtration is the standard 40 um element; choose W for 5 um where downstream equipment needs finer air. The fitted gauge is the embedded square type reading psi; MPa and bar scales and an external round gauge are options. The trailing G sets a BSPP thread; PT is the series standard and NPT can be ordered as a specification choice. The L code makes this the low-pressure regulator type - its exact adjustment range is not published in the sheet we work from, so ask us to confirm it. No mounting bracket is included with this code (J); a bracket can be ordered.
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 GFR300 series as curves, not as a single rated number, so we do not quote a figure here. Send us your line pressure, port size and the flow your application needs, and we will confirm the sizing against the datasheet curves on request before you order.
L marks the low-pressure regulator type. The exact adjustment range for the low-pressure version is not published in the catalogue sheet we work from, so we confirm it on request. The gauge supplied with this code is the embedded square type reading in psi; MPa and bar scales are available to order.
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.