Airtac GFR Filter Regulator GFR300C08NK
The AirTAC GFR Filter Regulator GFR300C08NK 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.
- TypeFilter regulator
- Port sizeSee datasheet
- Regulating range0.15 - 0.9 MPa (20 - 130 psi)
- Filtering grade40 µm
- DrainDifferential-pressure drain
- Bowl materialPC
- Pressure gaugeFitted
- ThreadPT
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac GFR Filter Regulator GFR300C08NK
The AirTAC GFR300 is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in one body - no lubricator in this family. This configuration is the 300 size with a PT1/4 port (PT is the standard thread; G and NPT are catalogue thread options), the standard 40 um element, a differential-pressure drain bowl in polycarbonate (300-size bowls are PC, not metal), no gauge fitted, and a reverse-flow (check) valve included. Maximum inlet pressure is 1.0 MPa (145 psi); with this drain the regulator adjusts 0.15-0.9 MPa (20-130 psi); operating temperature is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The G series spans sizes 200 to 600 with ports from 1/8 to 1 inch, and offers drain types (differential-pressure, automatic, manual), a 5 um element (W suffix), gauge options, G/NPT threads and a no-bracket (J) variant. Flow figures are published as curves, not a single rating - ask us and we will confirm sizing and datasheet numbers for your application before you order.
Airtac GFR Filter Regulator GFR300C08NK Technical Specifications
| Model | Airtac GFR Filter Regulator GFR300C08NK |
|---|---|
| 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.
Model Code: Airtac GFR Filter Regulator GFR300C08NK
| 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.
Size Class
- GFR200PT1/8" - PT1/4"
- GFR300PT1/4" - PT1/2"
- GFR400PT3/8" - PT1/2"
- GFR600PT3/4" - PT1"
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) |
Where the Airtac GFR Filter Regulator GFR300C08NK Is Used
CNC machining cell clamping
Filtered, regulated air for clamp cylinders and tool-change actuators on a CNC machining centre, specified with a reverse-flow (check) valve in the machine's air-prep drop.
Parcel conveyor diverters
Supply air for diverter gates and stopper cylinders along a parcel-sorting conveyor, with the 40 um element protecting directional valves from grit and condensed water.
Actuated process valves
Pressure-regulated air to quarter-turn ball valve actuators on a water treatment skid, where the check-valve version is called for in the loop specification.
Is the Airtac GFR Filter Regulator GFR300C08NK the Right Unit?
Size 300 carries a 1/4 inch port; step to 200 for smaller drops or to 400/600 where the circuit needs a bigger port. Drain choice matters: this version uses the differential-pressure default (0.15-0.9 MPa adjust range); the automatic (A) option suits unmanned drops, while manual (M) widens the adjust range to 0.05-0.9 MPa. The K suffix fits a reverse-flow (check) valve - choose it where your circuit calls for reverse flow capability; drop the K for the standard version. The N here means no gauge is fitted; gauge options are a catalogue choice.
Element grade is 40 um standard; order the W version for 5 um finishing air. Thread: PT is standard, G (BSPP) and NPT are orderable options, and the bracket is included unless J is specified. Flow is published as curves, not a single rated figure - send us your application and we will confirm the sizing against the datasheet before ordering.
Quick checklist
- ✓ Body size for your peak flow (See datasheet here)
- ✓ Element 40 µm or 5 µm
- ✓ Drain sets the regulating band
- ✓ Gauge fitted, shape and scale
- ✓ Thread PT, G (BSPP) or NPT
- ✓ Oil needed downstream? Use GFC instead
Installation & Maintenance Notes
- check Mount vertically, bowl down, following the airflow arrow.
- check One body does the filtering and the regulating — no separate regulator needed.
- check Keep inlet pressure at or below 1.0 MPa (145 psi).
- check Adjust only within 0.15 - 0.9 MPa (20 - 130 psi).
- check Drain condensate before the bowl fills.
- check Keep the unit above freezing (-5 to +70 °C, unfreeze).
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 GFR Filter Regulator GFR300C08NK FAQ
AirTAC publishes flow for the G series as performance curves rather than a single rated number, so we do not quote a rated flow figure. Tell us your working pressure and demand and we will confirm the sizing from the datasheet before you order.
K means a reverse-flow (check) valve is fitted in this filter regulator. The same unit without K is the standard version. If your circuit drawing calls out a check valve in the air preparation drop, this is the code to select.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
Request a Quote for Airtac GFR Filter Regulator GFR300C08NK
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.