Airtac GFR Filter Regulator GFR300C08JNWK
The AirTAC GFR Filter Regulator GFR300C08JNWK 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 GFR300C08JNWK
This GFR-series unit is a filter regulator: a 5 um filter element (the W code, finer than the 40 um standard) and an air pressure regulator combined in one body with a single polycarbonate drain bowl. This PT1/4 (1/4 in) configuration is the standard pressure type with a 0.15-0.9 MPa (20-130 psi) adjustment range and a differential-pressure drain that clears condensate in response to the pressure drop across the element. The J suffix means no mounting bracket, N means no gauge, and K means a reverse (check) valve is fitted to hold downstream pressure if the upstream supply drops. Maximum inlet pressure is 1.0 MPa (145 psi); operating temperature is -5 to 70 C.
This is a genuine AirTAC part from the G series, which runs from 200 to 600 sizes with ports from 1/8 to 1 in, plus drain, filtration, gauge, bracket and thread choices. G-series flow is published as curves rather than a single rated figure, so ask us for the datasheet and we will confirm the relevant figures for your application on request.
Airtac GFR Filter Regulator GFR300C08JNWK Technical Specifications
| Model | Airtac GFR Filter Regulator GFR300C08JNWK |
|---|---|
| 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 GFR300C08JNWK
| 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 GFR300C08JNWK Is Used
Conveyor stop-and-hold circuits
Regulating the 1/4 in air to conveyor brake and clamp cylinders, with the check valve holding the set pressure through short upstream supply dips.
Clamping fixtures on machining lines
Feeding 5 um-filtered, regulated air to pneumatic clamping fixtures on a transfer line, where the check valve helps retain clamp pressure if supply drops.
Air knife and blow-off stations
Conditioning supply air at a 1/4 in blow-off station on a filling or drying line, keeping water and fine particulate out of the nozzles and hose circuit.
Is the Airtac GFR Filter Regulator GFR300C08JNWK the Right Unit?
This version pairs the 5 um (W) element with the K check valve, useful where regulated pressure must persist through a brief upstream supply dip on a finer-filtration circuit. Size 300 with a 1/4 in PT port suits 1/4 in tubing and fittings; size up or down against the published flow curve, not a single number. The differential-pressure drain fits continuous running; automatic (A) or manual (M) are alternatives, with manual drain widening the regulator range to 0.05-0.9 MPa (7-130 psi). No bracket and no gauge are fitted (J/N); add a gauge code if you need pressure indication, and note PT is the standard thread with G (BSPP) and NPT to order. Because flow is published as curves, not a single rating, ask us to confirm sizing against your application 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 GFR300C08JNWK FAQ
There is no single rated flow figure we can quote: AirTAC publishes G-series flow as performance curves. Ask us for the datasheet and we will confirm the curve and correct size for your pressure and application on request before you order.
K specifies a reverse (check) valve fitted in the regulator section, which holds downstream pressure when the upstream supply drops. Everything else in GFR300C08JNWK matches the plain JNW: PT1/4 port, 5 um element, differential-pressure drain, no bracket, no gauge.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for Airtac GFR Filter Regulator GFR300C08JNWK
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.