The AirTAC GFR300-08T AirTAC Filter Regulator NPT1/4 40 um Manual Drain 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 manual drain and regulates 0.05 - 0.9 MPa (7 - 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 combines water and particulate filtration with pressure regulation in a single body, so one component cleans the air and sets a stable downstream pressure. This configuration is the 300 size with a 1/4 in NPT port, a 40 um standard filter element, a manual drain you operate by hand to empty collected condensate, and a round pressure gauge reading in bar. The polycarbonate bowl lets you see the condensate level at a glance, and the mounting bracket is included for secure panel or wall fixing.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, element grades of 40 um standard or 5 um optional, a choice of manual, automatic or differential-pressure drain, and G or NPT threads as order options alongside standard PT. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR300-08T AirTAC Filter Regulator NPT1/4 40 um Manual Drain |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT1/4" (NPT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 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 | Manual drain |
| Bowl material | PC |
| Pressure gauge | Fitted — round, bar 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 0.05 - 0.9 MPa (7 - 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". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 130 psi)). |
| (blank) | Standard type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 3 | Gauge scale: bar. 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. |
| (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 · PT1/4" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-08 (two-unit set) |
Mounted ahead of the clamp cylinders on a CNC fixture line, this unit filters machining-air moisture and chips-carried particulate to 40 um and holds the clamp pressure steady at the set point, with the bar gauge giving the operator a direct reading at the fixture.
Installed at the drop point feeding sealing jaws and diverters on a carton packing conveyor, the 1/4 in NPT port suits the local drop, the manual drain is emptied at shift start, and the regulator keeps jaw pressure consistent across the run.
Fitted on the wall bracket above an assembly bench that runs air tools and blow-off guns, this unit cleans the shop supply and lets each operator set and read the bench pressure in bar without touching the main header regulator.
Start with the port size: this unit steps up from the 200 size at 1/8 in to the 300 size at 1/4 in, and the larger 400 and 600 sizes carry proportionally more flow, so match the size to your line's air demand. Choose the drain to suit access: manual drain (this model) needs someone to open it periodically, automatic drain empties itself, and the differential-pressure default drains on a pressure drop. The 40 um element suits general plant air; specify the 5 um W option where finer filtration is needed. The gauge here reads in bar, and MPa or psi scales are also available. Thread is NPT on this unit; PT is standard and G is also an order option. A bracket is included.
Because AirTAC publishes flow only as curves and not as a single rated figure, we do not quote a flow number here. 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 GFR300 as curves rather than a single rated figure, so we do not quote a flow number. Send us your application details and we will confirm the datasheet flow figures and check the sizing against your demand before you order.
The M in the code specifies a manual drain: condensate collected in the polycarbonate bowl is released by opening the drain by hand. It suits installations with regular maintenance access. If you cannot rely on scheduled draining, the same GFR300 body is available with an automatic drain (code A) or the differential-pressure drain that is the default.
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.