The AirTAC GFR300C08AC1WTK AirTAC Filter Regulator NPT1/4 5um 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 GFR300C08AC1WTK is a filter regulator: it removes water and particulate from compressed air and holds downstream pressure steady in one compact body. This unit is built on the 300 size with a 1/4 in NPT port and carries the 5 um filter element (code W) instead of the standard 40 um grade. An automatic drain (code A) bleeds condensate from the polycarbonate bowl without manual attention, a round pressure gauge reads in MPa, and an internal check valve (code K) holds downstream pressure when the upstream supply is cut. The regulator adjusts from 0.15 to 0.9 MPa (20-130 psi) with a maximum inlet pressure of 1.0 MPa (145 psi), the unit operates from -5 to 70 C (non-freezing), and a mounting bracket is included.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 in, and options for thread type (PT standard, with G and NPT as orderable specifications), drain type, filter grade and gauge style. Published flow data appears as curves rather than a single rating, so ask us to confirm the figures for your application and we will send the datasheet on request.
| Model | GFR300C08AC1WTK AirTAC Filter Regulator NPT1/4 5um |
|---|---|
| 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) |
Feeding filtered, regulated air to the tool-change cylinder and workpiece clamps on a machining centre, where the 5 um element protects directional valves from fine particulate and the check valve holds clamp pressure if the main supply drops.
Regulating air to pick-and-place cylinders and box diverters on a carton packaging conveyor, with the automatic drain keeping condensate out of the circuit at a drop point that staff rarely visit.
Dropping pressure at the point of use in an assembly cell where the shop air main runs well above what the screwdrivers and pneumatic press need, with the round MPa gauge giving operators a clear setting reference.
Choose the size by the port and flow your line needs: 300 sits in the middle of the GFR range (200/300/400/600), here with a 1/4 in NPT port. Drain options are differential-pressure (the default), automatic (as fitted here) and manual; automatic suits installations that are hard to reach. Filter grade is 40 um as standard or 5 um with code W, as on this unit. Gauges are the embedded square type as standard or an external round gauge in MPa, psi or bar scales; this unit carries a round MPa gauge. Thread is PT as standard with G (BSPP) and NPT as orderable options, and a bracket is included (code J omits it). Because flow is published 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 series as curves, not as a single rated figure, so we do not quote a number here. Send us your flow and pressure requirements and we will confirm the sizing from the datasheet on request.
The GFR series comes with a 40 um element as standard; code W specifies the finer 5 um grade for better particulate removal ahead of sensitive valves and cylinders. This unit carries the 5 um element, and the automatic drain (code A) keeps condensate out of the polycarbonate bowl without manual draining.
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.