The AirTAC GFR300C08LF2WK AirTAC Filter Regulator PT1/4, 5 um 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 GFR300C08LF2WK is an AirTAC GFR-series filter regulator: one body that removes water and particulate from compressed air and sets downstream pressure. This configuration is the size 300 unit with a PT1/4 (1/4 in) PT port, the fine 5 um filter element (code W), a differential-pressure drain that bleeds collected condensate automatically whenever the pressure differential across the element rises, and the low-pressure regulator type. It is fitted with the embedded square gauge scaled in psi, a reverse/check valve (code K) that holds downstream pressure when the upstream supply is lost, and a mounting bracket.
This is a genuine AirTAC part. The GFR family is published in sizes 200, 300, 400 and 600 with a choice of ports, PT, G or NPT threads, drain types, 40 um or 5 um elements, gauge scales and standard or low-pressure regulation, so a variant can be matched to most point-of-use duties. Flow figures are published as curves rather than a single rating; ask us and we will confirm the datasheet figures for this exact model on request.
| Model | GFR300C08LF2WK AirTAC Filter Regulator PT1/4, 5 um |
|---|---|
| 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) |
On a CNC fixture line, clean air and a steady, lower-than-line clamping pressure protect workpiece finish and fixture seals. This unit filters the supply to 5 um, regulates it to the low setting the clamps need, and the check valve holds clamp force if the main supply drops.
Paint spray stations want filtered air delivered at a gentle, stable pressure so atomisation stays consistent. Feeding the booth header through this filter regulator removes water and fine particulate ahead of the guns while the low-pressure type sets the mild working pressure the booth was designed around.
Bench-top analysers and test rigs often specify a fine-filtered, low-pressure air supply. This unit's 5 um element and low-pressure regulation suit that duty, the psi-scaled square gauge gives operators a direct reading, and the differential-pressure drain keeps condensate off the instruments without daily attention.
Size 300 with a 1/4 in port sits in the middle of the GFR range; step up to 400 or 600 for larger ports and more flow, or down to 200 for compact point-of-use drops. This unit carries the 5 um element (W) - choose it where downstream equipment is sensitive to fine particles; the standard grade is 40 um. The differential-pressure drain is the default and needs no operator action; automatic (A) and manual (M) drains are order options on other variants. The embedded square gauge here reads in psi; MPa and bar scales and an external round gauge are alternatives. Thread is PT as standard, with G (BSPP) and NPT available to order, and the mounting bracket is included. Flow is published as curves, not a single rated figure, so send us your application details and we will confirm sizing against the datasheet before you order.
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 number, so we do not quote a figure here. Tell us your working pressure and air demand and we will confirm the flow curve and sizing for this exact model from the datasheet on request.
The 5 um grade is the W option in the GFR code. It is chosen where downstream devices - spray guns, instruments, precision valves - are sensitive to fine particles. The standard grade is 40 um and is fine for general workshop drops; both grades are available across the GFR range, and the low-pressure regulation span for this variant is confirmed from the datasheet on request.
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.