The AirTAC GFR300-08JC1TK 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 PT1/4" 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 GFR300-08JC1TK is a 300-size filter regulator that removes water and particulate from compressed air and regulates downstream pressure in one body. This configuration has a 1/4 in NPT port, a 40 um standard filter element, a differential-pressure drain that bleeds collected condensate automatically whenever the pressure differential across the element is high enough, a round external gauge reading in MPa, and a built-in reverse (check) valve that holds the downstream setting when upstream supply is lost. The regulator is the standard type with an adjustment range of 0.15-0.9 MPa (20-130 psi), and maximum inlet pressure is 1.0 MPa (145 psi). The polycarbonate bowl suits non-freezing compressed-air service from -5 to 70 C.
This is a genuine AirTAC part. The GFR family is available in sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, and with choices of drain type, 40 um or 5 um (W) filtration, gauge style and scale, thread (PT standard; G and NPT as order options), and bracket. Flow is published as curves rather than a single rating, so we confirm the datasheet and sizing figures for your application on request.
| Model | GFR300-08JC1TK AirTAC Filter Regulator NPT1/4 |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (NPT 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 — round, MPa scale |
| Reflux valve | Fitted (reverse flow permitted) |
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. |
|---|---|
| 08 | Port size PT1/4". 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. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 1 | Gauge scale: MPa. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT thread. PT is the default; G is BSPP and T is NPT. |
| K | Reverse-flow (reflux) valve fitted. |
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 · PT1/4" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
Clean, regulated air feeding the tool-change cylinder and pneumatic clamps on a machining centre, with the check valve holding the clamp setting if shop air dips.
Point-of-use preparation for the pneumatic cylinders that drive carton forming and sealing heads on a packaging conveyor, with condensate bled off by the differential-pressure drain.
Filtering and regulating the air at each workbench drop in an assembly plant, so air tools and small actuators see stable pressure and dry, particle-free air.
Start with the port step: this unit is the 300 size with a 1/4 in NPT port; step up to 400 or 600 if the application needs a larger connection and more flow capacity. Choose the drain to match the installation: differential-pressure (as fitted here) needs no operator attention, automatic (A) drains continuously, and manual (M) suits supervised positions. Pick the filter grade: 40 um is standard for general air preparation, 5 um (code W) for finer protection. The round MPa gauge is fitted here; square embedded gauges and psi or bar scales are also available. Thread is PT as the AirTAC standard, with G (BSPP) and NPT as order options - this unit is ordered in NPT. A mounting bracket is not included with the J code.
For sizing, flow is published as curves rather than a single rated figure, so tell us your required flow and pressure and we will confirm against the datasheet before you order.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes filter-regulator flow as curves rather than a single rated figure, so we do not quote a number here. Send us your required flow and working pressure and we will confirm the sizing against the datasheet for this 300-size, 1/4 in NPT unit before you order.
K means a reverse (check) valve is fitted, so downstream pressure is held if the upstream supply is interrupted. The drain on this unit is differential-pressure type: condensate collected in the PC bowl is bled off automatically when the pressure differential across the 40 um element rises, with no manual draining needed.
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.