The AirTAC GFR300-08NWT AirTAC Filter Regulator NPT 1/4, 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 AirTAC GFR300C08NWT is a size-300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This configuration is specified with a 5 um filtration element (finer than the 40 um standard), a differential-pressure drain that bleeds collected condensate automatically as flow passes through, a 1/4 in NPT port, and a standard regulator adjustable from 0.15-0.9 MPa (20-130 psi). No gauge is fitted, so pair it with your own pressure gauge if you need a setpoint readout. The polycarbonate bowl suits the 300 size, and a mounting bracket is included.
This is a genuine AirTAC part from the GFR filter-regulator family, which spans sizes 200, 300, 400 and 600 with port options from 1/8 in to 1 in and PT, G or NPT threads. Maximum inlet pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C (non-freezing). Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GFR300-08NWT AirTAC Filter Regulator NPT 1/4, 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) |
Conditioning the air feeding directional valves and cylinders on a carton-form-fill-seal line: water and fines are stripped out at 5 um while the regulator holds a steady working pressure for consistent jaw and sealing actuation.
Supplying filtered, regulated air to blow-off nozzles along a bottling or food conveyor, where condensate carryover would spot containers and the differential-pressure drain keeps the bowl emptying itself during production.
Feeding test rigs and pneumatic fixtures in an R&D or QC lab, where the 5 um element protects sensitive instrumentation and the regulator dials in precise test pressures up to 0.9 MPa.
Size and port are the first choice: the 300 size with a 1/4 in NPT port sits mid-range in the GFR family, and the right step depends on the air demand of the circuit - larger sizes carry larger ports and more flow. The 5 um element in this unit is the finer option versus the 40 um standard, worth choosing where downstream valves or instruments are sensitive to finer particulate. The differential-pressure drain needs no operator attention; an automatic drain (code A) or manual drain (code M) are the alternatives in the family. A gauge can be ordered (round or square, MPa, psi or bar scale) if you want a local pressure readout, and PT is the standard thread with G and NPT as order options.
Flow for this family is published as curves, not a single rated number, so we cannot quote a rated l/min or SCFM figure here. Send us your application's air demand 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 figure, so we do not quote a rated l/min, SCFM or Cv number. Tell us your application's air demand and we will confirm the flow curve and sizing from the datasheet on request before you order.
The W in the code specifies the optional 5 um filtration grade; 40 um is the family standard, so choose 5 um where downstream equipment is sensitive to finer particulate. No gauge is fitted in this configuration - if you want a local pressure readout, order a variant with a round or square gauge in MPa, psi or bar scale.
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.