The AirTAC GFR300-10NWT AirTAC Filter Regulator, NPT 3/8 in is a genuine G-series filter regulator: water separation, 5 µm particulate filtration and balanced-type pressure regulation combined in a single body. It has PT3/8" 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 GFR300-10NWT is a size-300 filter regulator that cleans compressed air and sets downstream pressure in a single body. Filtration is the 5 um grade (code W), which removes water and finer particulate than the 40 um standard element, and the manual drain lets an operator bleed collected condensate from the PC bowl on a chosen schedule. The regulator is the standard type with an adjustment range of 0.05-0.9 MPa (7-130 psi), and this unit is ordered without a gauge and without a reverse/check valve; a mounting bracket is included. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C (non-freezing).
This is a genuine AirTAC part in the GFR filter-regulator family, which spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in and PT, G (BSPP) or NPT threads. Drain type, filter grade, gauge style and scale, low-pressure type and reverse-valve options can be selected per code. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet and sizing figures for your application on request.
| Model | GFR300-10NWT AirTAC Filter Regulator, NPT 3/8 in |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (NPT thread) |
| Filtering grade | 5 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 | Not fitted |
| 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. |
|---|---|
| 10 | Port size PT3/8". 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. |
| N | No pressure gauge (N). |
| (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. |
| W | Filtering grade 5 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 · PT3/8" · 5 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
Feeding filtered, pressure-set air to a machining centre's pneumatic tool-changer and clamping circuits, where the 5 um element helps protect close-tolerance valves from water and fine particulate.
Regulating supply pressure to conveyor stopper cylinders and carton-forming actuators on a packaging line, with manual drain suited to a line that is attended at every shift.
Conditioning air at individual machine drops in a textile mill, combining water and lint-laden particulate removal with a stable regulated pressure for loom and winding-machine pneumatics.
Size 300 with a 3/8 in NPT port sits mid-range in the GFR line: step up to size 400 or 600 when the circuit demands more flow, or down to size 200 for compact lines - we confirm the flow curve against your demand before you order. The 5 um element (W) suits points where finer particulate matters; the 40 um standard grade is the economical choice for general supply. Manual drain (M) means condensate is emptied by hand, which suits attended installations; automatic or differential-pressure drains are available on other codes in this family. This code carries no gauge - add a gauge variant if a local pressure readout is needed, in square (embedded) or round (external) style with MPa, psi or bar scale. Thread here is NPT (T); PT is the catalogue standard and G (BSPP) is also an order option. A mounting bracket is included with this code.
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 series as curves, not as a single rated figure, so we do not quote a number. Tell us your application and we will confirm the flow curve and datasheet figures on request so you can size the unit correctly.
In the code GFR30010MNWT, M is the manual drain (condensate is emptied by hand rather than automatically) and N means no gauge is fitted. If you prefer automatic or differential-pressure draining, or need a local pressure readout, those are available on other GFR300 codes - ask us to quote the variant.
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.