The AirTAC GFR400-10T AirTAC Filter Regulator, NPT 3/8 in, 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 PT3/8" 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 GFR400-10T is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body, so one component does both jobs in the air-preparation line. This size 400 unit is fitted with a 3/8 in NPT port, a differential-pressure drain that bleeds collected condensate automatically as flow passes through, and a 40 um standard filter element. It is the low-pressure (L) type, intended for circuits set well below standard working pressures, and it carries a round pressure gauge scaled in bar. The polycarbonate bowl suits this size class, and a mounting bracket is included.
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port options from 1/8 in to 1 in, a choice of differential-pressure, automatic or manual drain, an optional 5 um (W) element, square or round gauges with MPa, psi or bar scales, and PT, G or NPT threads. Flow figures for this catalogue are published as curves rather than a single rating, so ask us to confirm the datasheet and sizing for your application on request.
| Model | GFR400-10T AirTAC Filter Regulator, NPT 3/8 in, Low-Pressure |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT3/8" (NPT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Low-pressure 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 — round, bar 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. The low-pressure type adjusts over a lower band than standard; we confirm the exact figures from the factory datasheet. 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. |
|---|---|
| 10 | Port size PT3/8". 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)). |
| L | Low-pressure type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 3 | Gauge scale: bar. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT 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 · PT3/8" · 40 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-10 (two-unit set) |
A carton-sealing or case-packing line running low set pressures can use this filter regulator to clean the supply air and hold a gentle clamp pressure on the hold-down cylinders, with the bar-scaled round gauge giving the operator a clear setting reference.
On a bench that feeds pneumatic test fixtures or sample-handling actuators, this unit strips water and 40 um particulate from the shop air and regulates it in one body, keeping the bench plumbing short and the drain maintenance hands-off.
Quarter-turn valve actuator circuits that position on modest pilot pressures benefit from a low-pressure type filter regulator: clean, regulated air to the positioner and solenoid pilot, with the differential-pressure drain handling condensate in a wet plant air line.
Start with the port step: this unit is size 400 with a 3/8 in NPT port, one step up from the 1/4 in size 300 class, so pick it where your line flow sits above what a 300 can pass - we will confirm the exact curve against your demand before you order. Drain choice matters: the differential-pressure drain fitted here needs no operator attention, but an automatic (A) or manual (M) drain can be ordered instead. The 40 um element fitted is the standard grade; specify the W option if you need 5 um filtration. Gauge options are the embedded square gauge or an external round gauge, in MPa, psi or bar scales - this unit ships with the round gauge in bar. Thread is NPT here; PT (standard) and G are order options. A bracket is included, and the low-pressure (L) type is the right pick when your set pressure is well below the standard range - its exact regulation range is not published, so confirm it with us.
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, not as a single rated number, so we do not quote a l/min or SCFM figure here. Tell us your line pressure and air demand and we will confirm the curve data and correct sizing from the datasheet on request before you order.
The L code means this GFR400-10T is the low-pressure regulator variant, intended for circuits set well below standard working pressures; its exact regulation range is not published in the catalogue, so confirm it with us against your set point. Everything else decodes as standard: 40 um element, differential-pressure drain, round bar gauge, 3/8 in NPT port and included bracket.
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.