The AirTAC GFR400C10ALJNWT AirTAC Filter Regulator 3/8 in NPT 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 GFR400C10ALJNWT is a filter regulator: water and particulate filtration plus pressure regulation combined in one body. This configuration is the 400 size with a 3/8 in NPT port, a 5 um filter element (code W), an automatic drain, and the low-pressure regulator type. No gauge is fitted and no 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. The GFR400 belongs to AirTAC's GFR filter-regulator line, which spans sizes 200, 300, 400 and 600 with ports from 1/8 to 1 in, and options including manual or differential-pressure drains, the 40 um standard element, gauge choices, and G (BSPP) or NPT threads. AirTAC publishes flow as curves rather than a single rated figure, so we confirm flow and other datasheet figures on request.
| Model | GFR400C10ALJNWT AirTAC Filter Regulator 3/8 in NPT |
|---|---|
| Series | GFR400 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.
| GFR400 | G-series filter regulator, 400 body — sets the port range. |
|---|---|
| C1 | Port size See datasheet. 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)). |
| (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 | GFR400 · See datasheet · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-C1 (two-unit set) |
Fixture and clamp cylinders on a CNC machining cell need air with water and chips-scale particulate removed and the pressure held steady at a low setting. This unit filters the supply to 5 um and regulates it in one body, with the automatic drain clearing collected condensate between cycles.
Packaging conveyors use short-stroke cylinders for guide-rail positioning and product gating, where gentle, repeatable actuation matters more than force. A low-pressure regulator type keeps the setting conservative, while the 5 um element protects the small control valves downstream.
Bench-top test rigs and analytical instruments fed from a shop-air line need particulate removed down to 5 um and a stable, low regulated supply. The automatic drain keeps the bowl clear without operator attention, and the 3/8 in NPT port suits a dedicated rig feed.
Match the size and port to the air demand of the machine: this 400-size unit carries a 3/8 in NPT port, and larger sizes give larger ports and more flow. The code already fixes several choices - the 5 um element instead of the 40 um standard, the automatic drain instead of manual or differential-pressure, and the low-pressure regulator type instead of standard. The exact regulated-pressure band for the low-pressure type is not published, so confirm your required setting range with us. Other decodable choices in the family include a fitted gauge with an MPa, psi or bar scale, PT or G (BSPP) threads, and a mounting bracket. Because AirTAC publishes flow only as curves, not 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 GFR-series flow as curves rather than a single rated figure, so there is no one rated-flow number we can quote. Send us your application's air demand and operating pressure and we will confirm sizing and the full datasheet figures on request before you order.
The A in the code means an automatic drain: collected condensate is expelled from the bowl without manual attention, unlike the manual-drain and differential-pressure-drain versions also available in this family. The W in the code selects the 5 um element instead of the 40 um standard, for finer protection of downstream valves, cylinders and instruments.
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.