The AirTAC GFR400C10LF1WTK 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 GFR400C10LF1WTK is an AirTAC GFR400 filter regulator: filtration and pressure regulation combined in one body. It removes water and particulate from compressed air at the 5 um grade (code W, finer than the 40 um standard element) and regulates downstream pressure in the low-pressure type configuration. This unit is sized 400 with a 3/8 in NPT port, drains its bowl by differential pressure (no manual action needed during normal operation), carries an embedded square gauge scaled in MPa, and has a reverse/check valve fitted so upstream pressure loss does not dump the downstream circuit. 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 options from 1/8 in to 1 in, G (BSPP) and NPT thread variants, manual or automatic drain choices, 40 um or 5 um filtration, gauge and scale options, and a low-pressure regulator type. Maximum working (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 rating, so ask us and we will confirm the datasheet figures for your application on request.
| Model | GFR400C10LF1WTK 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) |
On a bench or frame press running air cylinders at a low set pressure, this unit filters the shop air to 5 um and holds the regulated supply steady, with the check valve keeping the cylinder circuit pressurised if the main line dips.
Carton sealers, case erectors and wrapping machines on a packaging line use low-pressure air for clamps and diverters; a 3/8 in filter regulator at the machine drop conditions the supply and the square MPa gauge lets operators verify the set point at a glance.
Finishing and coating equipment is sensitive to water and fine particles in the air supply; the 5 um element plus water removal at the bowl protects the application, while the low-pressure regulator suits equipment specified to run below standard line pressure.
Size 400 with a 3/8 in NPT port sits in the upper-middle of the GFR range; step up to size 600 (1/2 in to 1 in ports) for larger air demand or down to 200/300 for compact lines - match the size and port step to the flow your circuit needs, and we will confirm the flow curve against your application before you order. The 5 um element (code W) suits downstream equipment that needs finer particulate removal than the 40 um standard; choose 40 um where coarser protection is enough. Drain is differential-pressure here; manual (code M) and automatic (code A) drains are available in the family if your maintenance routine prefers them. This is the low-pressure regulator type, chosen where the working set point sits below what a standard regulator targets - its exact adjustment range is not published, so confirm it with us for your set pressure. The fitted square gauge reads in MPa; psi and bar scales and an external round gauge are options. NPT is specified on this code; G (BSPP) is the other catalogue thread option, and PT is the family standard. Bracket included; J codes omit it.
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 figure that is not in the datasheet as a rating. Send us your application details and we will confirm the flow curve and sizing for this 3/8 in, size 400 unit on request.
The K in the code means a reverse/check valve is fitted: if upstream pressure collapses, the valve holds the regulated downstream circuit instead of letting it dump back through the unit. The L means this is the low-pressure regulator type, intended for set points below the standard type's range; its exact adjustment range is not published, so confirm it with us against your working pressure before ordering.
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.