The AirTAC GFR400C15ALJF3WT AirTAC Filter Regulator NPT1/2, 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 GFR400C15ALJF3WT is an AirTAC GFR400 filter regulator: filtration and pressure regulation combined in a single body. It removes water and particulate down to 5 um (the fine W grade, versus the standard 40 um) and regulates downstream pressure in a low-pressure type configuration. This unit carries 1/2 in NPT ports, an automatic drain that expels collected condensate without manual attention, an embedded square gauge scaled in bar, and no reverse/check valve. Maximum inlet pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C, non-freezing. The bowl is metal. No mounting bracket is included with the J suffix.
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, and options including drain type, filter grade, gauge scale, thread form (PT standard, G and NPT to order) and bracket choice. Flow for this series is published as curves rather than a single rated figure, so ask us to confirm flow and datasheet figures for your application before ordering.
| Model | GFR400C15ALJF3WT AirTAC Filter Regulator NPT1/2, 5 um |
|---|---|
| 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) |
Feeds filtered, regulated air to the tool-clamp and actuation circuits of a machining centre, where the 5 um element protects precision valves from particulate and the automatic drain keeps condensate off the shop floor without operator rounds.
Supplies the pneumatic cylinders and grippers on a carton-forming and sealing station, holding a steady low-pressure setting for gentle handling while the bar gauge gives operators a visible setpoint reference.
Conditions the supply to air-jet and doffing circuits on textile machinery, where the automatic drain copes with continuous condensate carry-over and the compact filter-regulator body saves panel space.
Size 400 with 1/2 in NPT ports suits lines with substantial air demand; step down to 300 or up to 600 if your flow requirement or existing pipework differs. The 5 um element (code W) is the finer choice where downstream valves and instruments tolerate less particulate than the 40 um standard grade allows. The automatic drain suits unattended or hard-to-reach installations; manual and differential-pressure drains are available in the family if you prefer scheduled or load-linked draining. The square gauge here reads in bar; MPa and psi scales are alternatives. NPT is the thread on this code, ordered as the T option against the PT standard; G (BSPP) is also available. No bracket is fitted with the J suffix - add one if the unit will be wall or panel mounted rather than in-line. 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 rather than a single rated figure, so we do not quote a rated flow, Cv or SCFM number. Send us your application details and we will confirm the flow and datasheet figures for this exact unit on request before you order.
The A in this code specifies an automatic drain: collected condensate is expelled from the metal bowl without manual intervention, which suits unattended or hard-to-reach installations. Manual and differential-pressure drain variants exist in the family if you prefer scheduled draining or load-linked operation.
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.