The AirTAC GFR400C10LF2TK AirTAC Filter Regulator NPT3/8 Low-Pressure 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 GFR400C10LF2TK is a size 400 filter regulator: water and particulate filtration plus pressure regulation in a single body. This configuration carries a 3/8 in NPT port, the standard 40 um filter element, and a differential-pressure drain that bleeds collected condensate automatically whenever the pressure differential across the element rises. It is the low-pressure type, so it is intended for circuits set below the standard regulator band; the exact adjustment range for this variant is not published, and we will confirm it from the datasheet on request. The embedded square gauge reads in psi, a reverse/check valve is fitted to hold downstream pressure if the upstream supply drops, and a mounting bracket is included.
This is a genuine AirTAC part from the GFR series, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in. Across the series you can order automatic or manual drains, a 5 um element (code W), gauge scales in MPa, psi or bar, and G (BSPP) or NPT threads in place of the PT standard. Rated flow for this series is published as curves rather than a single figure, so ask us to confirm the datasheet numbers for your application before ordering.
| Model | GFR400C10LF2TK AirTAC Filter Regulator NPT3/8 Low-Pressure |
|---|---|
| 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) |
A low-pressure clamping circuit on a machining centre needs clean, regulated air held at a modest setpoint. This unit filters the supply, regulates it in the low-pressure band, and the check valve helps hold the clamp if upstream pressure dips.
Packaging machines run many small cylinders and air cylinders from a shared header. A filter regulator at each machine drops the header pressure to the level the machine was set up for, with the 40 um element keeping pipe scale and condensate out of the valves.
Bench-scale process skids and pilot rigs often need filtered air regulated to a gentle, stable pressure. The low-pressure type regulator, psi-reading square gauge and differential-pressure drain make this unit a tidy single-body supply point for such a skid.
Start with the port step: size 400 with a 3/8 in NPT port sits in the middle of the GFR range, and the right size depends on the air demand of the circuit it feeds. Because AirTAC publishes flow for this series as curves and not as a single rated number, send us your application flow and we will confirm the correct size against the datasheet before you order. The drain on this unit is differential-pressure; if you prefer positive automatic draining or a manual drain, those are orderable variants. The 40 um element is standard, with a 5 um element (code W) available where finer filtration is needed. The embedded square gauge here reads in psi; MPa and bar scales are alternatives, and an external round gauge is an option. Thread is NPT on this unit, with G (BSPP) and PT as the other catalogue options, and a mounting bracket is included.
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 performance curves rather than a single rated figure, so there is no one rated flow number we can honestly quote. Tell us the flow and pressure your application needs and we will confirm the correct size and the relevant datasheet figures for you before you order.
The L in the code marks this as the low-pressure regulator variant rather than the standard type, intended for circuits set below the standard adjustment band. The exact adjustment range for the low-pressure type is not published in the material we hold, so we will confirm it from the datasheet on request. If your circuit runs at ordinary shop setpoints, the standard-type GFR400 is the usual choice.
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.