The AirTAC GFR30010NTK AirTAC Filter Regulator NPT 3/8 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 PT3/8" 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 GFR30010NTK is an AirTAC GFR-series filter regulator: one body that removes water and particulate from compressed air and sets downstream pressure. This 300-size unit is threaded NPT 3/8 in, carries the standard 40 um filter element, drains condensate by differential pressure, and has a reverse/check valve fitted so downstream pressure is held if the supply drops. No gauge is fitted on this variant, and the mounting bracket is included. Maximum inlet pressure is 1.0 MPa (145 psi) and the regulator adjusts from 0.15 to 0.9 MPa (20-130 psi). Operating temperature is -5 to 70 C, non-freezing.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, filter grades of 40 um standard or 5 um (code W), drain choices of differential-pressure, automatic or manual, and NPT, G or PT threads. Flow is published as curves rather than a single rating, so ask us to confirm the datasheet figures for your application before ordering.
| Model | GFR30010NTK AirTAC Filter Regulator NPT 3/8 |
|---|---|
| Series | GFR300 filter regulator |
| Port size | PT3/8" (NPT 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 | Not fitted |
| Reflux valve | Fitted (reverse flow permitted) |
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. |
|---|---|
| 10 | Port size PT3/8". 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. |
| 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. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT thread. PT is the default; G is BSPP and T is NPT. |
| K | Reverse-flow (reflux) valve fitted. |
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" · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-10 (two-unit set) |
On a machine-tool press line, this filter regulator cleans the shop air of water and chips-carried particulate and holds a set clamping pressure, with the check valve holding the circuit if the main supply dips mid-cycle.
Packaging lines run cylinders and air jets continuously; a 3/8 in filter regulator at the machine drop keeps moisture out of the valves and gives the operator one point to set working pressure for the sealing heads.
At a process-plant air drop feeding actuated valves or positioners, this unit combines water/particulate removal and pressure setting in one body, with differential-pressure drainage handling condensate automatically during normal flow.
Size and port set the capacity: the 300 frame with a 3/8 in NPT port sits mid-range in the GFR line, one step up from 1/4 in and one step down from 1/2 in. Match the size step to the air demand of the circuit rather than to the pipe alone. Drain choice matters: this unit uses differential-pressure drainage, which discharges condensate when the pressure drop across the element is high enough; automatic (code A) or manual (code M) drains are available in the family if your duty needs them. The 40 um element is the standard grade; specify 5 um (code W) where finer particulate removal is required. Thread is NPT here; G (BSPP) and PT are the other catalogue options. A mounting bracket is included with this code.
Flow for GFR units is published as curves, not as a single rated figure, so we do not quote a number here. Send us your flow and pressure requirements 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. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes GFR flow as curves rather than a single rated figure, so we do not state a l/min or SCFM number here. Tell us your working pressure and air demand and we will confirm the sizing from the datasheet on request before you order.
K means a reverse/check valve is fitted, so downstream pressure is retained if the upstream supply is lost. The N in the code means no gauge is supplied with this variant; gauge options exist elsewhere in the GFR family if you want a pressure indication at the unit.
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.