The AirTAC GFR300C10NWTK AirTAC Filter Regulator NPT3/8, 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 GFR300C10NWTK 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 threaded NPT3/8 (3/8 in), carries the fine 5 um filter element (code W) instead of the 40 um standard element, and drains condensate by the differential-pressure method. The regulator is the standard type with an adjustment range of 0.15-0.9 MPa (20-130 psi), a reverse/check valve is fitted, and a mounting bracket is included. No gauge is fitted on this variant, so add a separate gauge if a local pressure readout is needed. 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 from the GFR filter-regulator family, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 to 1 inch, a choice of differential-pressure, automatic or manual drain, 40 um or 5 um filtration, and PT, G or NPT threads. Flow is published as curves rather than a single rated figure, so ask us to confirm sizing and datasheet figures for your application before ordering.
| Model | GFR300C10NWTK AirTAC Filter Regulator NPT3/8, 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. |
|---|---|
| C1 | 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-C1 (two-unit set) |
Feeding clean, regulated air to the clamping and tool-change cylinders on a machining centre, where the 5 um element protects fine-valve pilot circuits from particulate and the check valve holds the set pressure if the supply dips.
Regulating air to the pusher, divert and seal bars on a carton packaging conveyor, with fine filtration keeping moisture and debris out of the directional valves that cycle thousands of times per shift.
Supplying adjusted, filtered air to bench-mounted test fixtures and small air cylinders in an R&D or quality lab, where the fine 5 um grade and stable 0.15-0.9 MPa setting support repeatable test conditions.
Size 300 with a 3/8 in port sits mid-range in the GFR family: step up to size 400 or 600, or down to 200, according to the flow your line needs. This unit already carries the fine 5 um element (code W); the 40 um standard element is the alternative if only coarse protection is required. Drain is differential-pressure as standard, with automatic (A) and manual (M) variants available in the family. The thread here is NPT; PT is the catalogue standard and G (BSPP) is also an order option, so match the thread to your piping. A gauge is not fitted on this code, and the reverse/check valve (K) is already included. Because flow is published as curves rather than a single rating, ask us to confirm sizing against your application before ordering.
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 number here. Tell us your application and we will confirm the flow and datasheet figures for this exact model on request before you order.
The W in the code specifies the fine 5 um filter element instead of the 40 um standard, and the N specifies that no gauge is fitted. If you need a pressure readout, add a suitable gauge to your order; the family also offers 40 um filtration and differential-pressure or manual drain variants.
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.