The AirTAC GFR400C10ALJF2W AirTAC Filter Regulator PT3/8, 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 GFR400C10ALJF2W is an AirTAC GFR-series filter regulator: filtration and pressure regulation combined in a single body, sized 400 with a PT3/8 (3/8 in) port. This configuration carries a 5 um filter element (the finer grade; 40 um is the standard option), an automatic drain that expels collected condensate without manual attention, and a low-pressure type regulator intended for circuits that run at reduced working pressures. An embedded square gauge with a psi scale is fitted so the set pressure is visible at the unit, the bowl is metal, and no mounting bracket is included. Maximum working (inlet) pressure is 1.0 MPa (145 psi) and the operating temperature range is -5 to 70 C (non-freezing). The medium is compressed air only.
This is a genuine AirTAC part. The GFR family is offered across sizes 200, 300, 400 and 600, with port options, a choice of differential-pressure, automatic or manual drain, 40 um standard or 5 um optional filtration, gauge scales in MPa, psi or bar, and PT, G or NPT threads to order. Flow is published as curves rather than a single rated figure, so we confirm flow and any other datasheet figure on request before you order.
| Model | GFR400C10ALJF2W AirTAC Filter Regulator PT3/8, 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) |
On a carton-sealing or case-packing conveyor, actuator cylinders and clamps run at reduced pressures to avoid crushing product. This low-pressure type filter regulator lets the line setter dial in and hold that lower setting, while the automatic drain keeps condensate out of the valves between shifts.
In a paint or coating booth, spray guns and air-assisted applicators need clean, moisture-free air at a steady, moderate pressure. The 5 um element trims fine particulate ahead of the gun, the automatic drain handles water collected from the main line, and the psi gauge gives the operator a visible setpoint.
Looms and textile finishing machines use small jets and tension rollers fed at gentle, stable pressures. A single GFR body filters and regulates the branch feed at the machine, and the low-pressure type regulator is matched to circuits that never see full line pressure.
Start with the size and port: the 400 size with its PT3/8 port sits in the middle of the GFR range (200/300/400/600), so step up or down according to the air demand of the circuit - the larger the size, the larger the port and the greater the flow capacity. Choose the drain to match maintenance access: automatic drain (this unit) suits installations that are not checked daily; manual drain suits attended stations; differential-pressure drain is the default. Choose the filter grade to match the downstream equipment: 40 um is the standard general-purpose element, while the 5 um element fitted here suits applications that need finer particulate removal. The gauge scale (MPa, psi or bar - psi on this unit) should match the scales your technicians work to, and PT is the standard thread with G and NPT available as order options. Brackets are optional where panel or surface mounting is needed. One honest note on sizing: 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 number, so we do not quote a l/min, m3/h or SCFM figure. Send us your application details - the size 400 body with its PT3/8 port is the mid-range of the family - and we will confirm the flow figures from the datasheet against your air demand before you order.
The A in the code means an automatic drain: condensate collected in the metal bowl is expelled on its own, which suits units mounted in awkward spots or on lines that run unattended. The alternatives are manual drain, where an operator opens the drain at intervals, and the differential-pressure drain, which is the catalogue default. All three are orderable choices on the same GFR400 body.
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.