The AirTAC GFR400-10LNWT AirTAC Filter Regulator NPT3/8, 5 um 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 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 GFR400-10LNWT is an AirTAC GFR400 filter regulator: one body that removes water and particulate from compressed air and reduces pressure downstream. This configuration is built on the size 400 frame with a 3/8 in NPT port, and it carries the 5 um filter element (code W) for finer filtration than the 40 um standard element. It is the low-pressure type (code L), intended for applications that work at lower set pressures; the exact adjustment range for the low-pressure type is not published in the catalogue, so we confirm it on request. The drain is differential-pressure, so collected condensate is expelled automatically when the pressure differential across the element reaches its threshold, with no manual draining routine. No gauge is fitted (code N), and a mounting bracket is included.
This is a genuine AirTAC part. The GFR filter-regulator family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, in PT (standard), G and NPT threads, with 40 um or 5 um elements, differential-pressure, automatic or manual drains, and gauge options on regulator-equipped versions. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and flow figures for your application before ordering.
| Model | GFR400-10LNWT AirTAC Filter Regulator NPT3/8, 5 um |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (NPT thread) |
| Filtering grade | 5 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 | 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. 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.
| GFR400 | G-series filter regulator, 400 body — sets the port range. |
|---|---|
| 10 | Port size PT3/8". This body offers 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. |
| 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 | GFR400 · PT3/8" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
On a machining cell where pneumatic clamps and small presses hold workpieces, this filter regulator cleans the supply to 5 um and holds a lower regulated pressure to the clamp circuit, with automatic condensate expulsion keeping moisture out of the valve package.
Feeding carton sealers, case erectors and bagging heads on a packaging line, the unit strips water and fine particulate before the directional valves and cylinders, and the low-pressure type regulator suits lines that run their actuators at reduced set pressures.
At individual machine drops in a converting or textile plant, the 3/8 in size 400 frame serves multiple air jets and actuators from one point, the 5 um element protects sensitive nozzle and guide components, and the differential-pressure drain handles condensate without operator attention.
Start with the size and port: the GFR400 steps up from the 300 series with a 3/8 in port, so choose it when your line's flow demand sits above what a 1/4 in unit comfortably serves - we can check the published flow curves against your consumption before you order. This unit already carries the 5 um element; if your application tolerates coarser filtration, the 40 um standard element version (no W code) is the alternative. The differential-pressure drain on this model expels condensate automatically; if you prefer a float-free manual drain or a fully automatic drain for unattended duty, other GFR400 variants cover those choices. No gauge is fitted, but gauge options (embedded square or external round, with MPa, psi or bar scales) exist on regulator-equipped G-series units if you want local pressure indication. Thread is NPT on this model; PT is the AirTAC standard and G (BSPP) is also an order option. A mounting bracket is included. Flow is published as curves, not a single rating, so 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 rated flow number. Send us your application's flow and pressure requirements and we will confirm the datasheet and flow curves for this exact model on request before you order.
The N code means no gauge is fitted, so there is no local pressure indication on this unit; gauge options (embedded square or external round, with MPa, psi or bar scales) exist on regulator-equipped G-series units if you want indication. The L code marks the low-pressure type, intended for lower set pressures than the standard regulator; its exact adjustment range is not published in the catalogue, so we confirm it on request.
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.