The AirTAC GFR300C08ALJF2TK AirTAC Filter Regulator NPT1/4 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 GFR300C08ALJF2TK is an AirTAC GFR300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one body. This configuration is the 300 size with a 1/4 in NPT port, an automatic drain that discharges collected condensate without manual attention, a 40 um standard filter element, and the low-pressure regulator type. A square pressure gauge (psi scale) is fitted, a reverse/check valve is included, and the unit is supplied without a mounting bracket. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing). The polycarbonate bowl suits the 300 size frame.
This is a genuine AirTAC part. The GFR family is published in 200, 300, 400 and 600 sizes with a choice of ports, drain types, 40 um or 5 um filtration, gauge styles and scales, and PT, G or NPT threads. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet and sizing figures for your application on request.
| Model | GFR300C08ALJF2TK AirTAC Filter Regulator NPT1/4 |
|---|---|
| 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. |
|---|---|
| C0 | 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-C0 (two-unit set) |
Clean, regulated air at a controlled low setpoint for clamp cylinders and press ram circuits on assembly fixtures, with the automatic drain handling condensate between shifts.
Point-of-use filtration and regulation for baggers, cartoners and sealing heads, where the 40 um element protects valves and the square psi gauge gives operators a local setpoint readout.
Regulated air supply to panel-mounted actuators, air relays and pilot devices, with the reverse/check valve holding the setting if upstream supply is interrupted.
Start with the port step: the 300 size carries the 1/4 in port here, and stepping up to 400 or 600 gives larger ports and more flow capacity, while 200 steps down. Choose the drain to match access: automatic (this unit) suits installations that are not checked daily, manual suits attended points, and differential-pressure drain is the catalogue default. Filtration is 40 um standard; specify the W code for 5 um where finer pre-filtration is needed. This unit is the low-pressure regulator type, so confirm the control range against your setpoint before ordering. Gauge scale is psi here; MPa and bar scales and an external round gauge are alternatives. Thread is NPT; PT and G (BSPP) are order options. A bracket can be added if this no-bracket version does not suit your mounting. Flow is published as curves, not a single rating, so ask us to confirm sizing against the 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 GFR300 as curves, not as a single rated figure, so we do not quote a number that could mislead your sizing. Tell us your application and we will confirm the flow and datasheet figures for this exact model on request.
The L code in GFR300C08ALJF2TK selects the low-pressure regulator type, intended for circuits controlled well below standard regulator settings. The exact adjustment range for the low-pressure type is not published on our sheet, so confirm your setpoint with us before ordering. Everything else decodes normally: 1/4 in NPT port, automatic drain, 40 um element, square psi gauge, reverse/check valve fitted, no bracket.
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.