The AirTAC GFR30010LNTK AirTAC Filter Regulator NPT 3/8 in Low-Pressure 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 GFR30010LNTK is an AirTAC GFR300 filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This 300-size unit is fitted with 3/8 in NPT ports, the standard 40 um filter element, and a differential-pressure drain that bleeds collected condensate automatically whenever the pressure differential across the element is high enough, so no manual draining routine is needed. It is the low-pressure (L) type, carries a reverse/check valve (K), and is supplied without a gauge (N). The polycarbonate bowl lets you see the condensate level at a glance.
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, optional 5 um filtration (code W), manual or automatic drains, gauge options, and G(BSPP) or NPT threads in place of the PT standard. Maximum inlet pressure is 1.0 MPa (145 psi) and the working temperature range is -5 to 70 C, non-freezing. Flow is published as curves rather than a single rated figure, so ask us to confirm flow or any datasheet figure for your application before ordering.
| Model | GFR30010LNTK AirTAC Filter Regulator NPT 3/8 in Low-Pressure |
|---|---|
| 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 | Low-pressure 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. The low-pressure type adjusts over a lower band than standard; we confirm the exact figures from the factory datasheet. 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)). |
| L | Low-pressure 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 CNC fixture line, clamping cylinders need clean, regulated air held at a low, stable setting so parts are held firmly without over-clamping. This low-pressure filter regulator conditions the supply and holds the set pressure, with the check valve helping hold the circuit if upstream supply dips.
Packaging machines run dozens of small cylinders for sealing, folding and ejecting. A 300-size filter regulator with 3/8 in NPT ports conditions the air at the machine drop, the 40 um element keeps debris out of valve spools, and the differential-pressure drain keeps condensate moving out without operator attention.
Sorting and diverting gates on conveyor lines cycle continuously on low-pressure air. This unit filters water and particles from the shop supply, regulates the station to the low setting the diverters were designed for, and the reverse/check valve supports the circuit against backflow at the station.
Size and port set the capacity envelope: the 300 size with 3/8 in NPT ports sits mid-range in the GFR line, a step up from 200-size units when your line needs more air, without moving to the 400 frame. Choose the drain to match maintenance reality: this unit's differential-pressure drain is fit-and-forget, while manual (M) or automatic (A) drains are order options. Filtration is the standard 40 um grade here; specify W for 5 um where finer protection is needed. This is the low-pressure (L) type, intended where the regulated output must sit in a lower band than the standard version delivers - confirm the exact range with us. No gauge is fitted (N); gauge and scale options exist if you want local pressure indication. NPT is the thread on this unit; PT is the catalogue standard and G(BSPP) is also available. Flow is published as curves, not a single rating, so send us your application details 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 flow for the GFR series as curves, not as a single rated number, so we do not quote a l/min or SCFM figure. Tell us your line pressure, downstream demand and allowable pressure drop, and we will confirm the flow from the datasheet curves for this 300-size, 3/8 in NPT unit before you order.
The L code means this GFR300 carries the low-pressure regulator rather than the standard one, intended for circuits where the regulated output must stay in a lower band; the exact range for this type is not published in our sheet, so confirm it with us. The N code means no gauge is supplied, so there is no local pressure indication unless you add one downstream or order a gauge 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.