The AirTAC GFR400-15 AirTAC Filter Regulator NPT1/2, 5 um, Manual Drain is a genuine G-series filter regulator: water separation, 5 µm particulate filtration and balanced-type pressure regulation combined in a single body. It has PT1/2" ports, a manual drain and regulates 0.05 - 0.9 MPa (7 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The AirTAC GFR400-15 is a filter regulator: it removes water and particulate from compressed air and regulates downstream pressure in a single body. This 400-size unit is specified with a 1/2 in NPT port, a 5 um filter element (code W, finer than the 40 um standard), a manual drain on the bowl, a low-pressure regulator type, a round psi gauge, and a built-in reverse/check valve. The manual drain means an operator opens the drain at the bottom of the polycarbonate bowl to expel collected condensate, which suits installations that are checked as part of a routine walk-round rather than left unattended.
This is a genuine AirTAC part from the GFR400 series, one of four sizes (200/300/400/600) covering a range of ports and flow capacities, with options including automatic, manual or differential-pressure drains, 40 um or 5 um filtration, gauge style and scale, G/NPT thread variants and bracket choices. Flow is published in the AirTAC catalogue as curves rather than a single rated figure, so ask us to confirm sizing or any datasheet figure for your application before ordering.
| Model | GFR400-15 AirTAC Filter Regulator NPT1/2, 5 um, Manual Drain |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (NPT thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 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 | Manual drain |
| Bowl material | PC |
| Pressure gauge | Fitted — round, psi scale |
| Reflux valve | Fitted (reverse flow permitted) |
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. |
|---|---|
| 15 | Port size PT1/2". This body offers 10 = PT3/8", 15 = PT1/2". |
| M | Drain: Manual drain — this also sets the regulating band (0.05 - 0.9 MPa (7 - 130 psi)). |
| L | Low-pressure type. Blank is standard, L is the low-pressure type. |
| J | Supplied without bracket. |
| (blank) | Pressure gauge fitted (blank). |
| C | Gauge shape: Round. C is round, F is square. |
| 2 | Gauge scale: psi. 1 is MPa, 2 is psi, 3 is bar. |
| W | Filtering grade 5 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| T | NPT thread. PT is the default; G is BSPP and T is NPT. |
| K | Reverse-flow (reflux) valve fitted. |
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 · PT1/2" · 5 µm |
|---|---|
| One size down | GFR300 |
| One size up | GFR600 |
| Add lubrication | GFC400-15 (two-unit set) |
A forming or assembly press that runs its air cylinders at a reduced working pressure takes filtered, regulated air from this unit: the 5 um element protects the valve stack, the low-pressure regulator type suits the reduced setting, and the check valve holds upstream isolation on the 1/2 in supply.
On a carton-sealing or wrapping line where pneumatic grippers and pushers run continuously, this filter regulator conditions the branch supply, the manual drain is emptied during shift checks, and the psi gauge lets operators verify set pressure at a glance.
Spray equipment is sensitive to both water carryover and pressure drift: the 5 um filtration polishes the air ahead of the booth, the regulator holds the atomising pressure steady, and the round psi gauge gives the operator a direct readout in the units the spray rig is specified in.
Start with the port step: this 400-size unit carries a 1/2 in port, and the G-series steps up through 200/300/400/600 as port size and flow capacity rise, so match the size against your line's air demand. Because flow is published as curves rather than a single rating, ask us to confirm sizing against the application before ordering. On filtration, the standard element is 40 um; this unit carries the 5 um (W) element for finer protection of downstream components. The manual drain (M) is the right choice where condensate can be drained during scheduled checks; choose automatic or differential-pressure drain codes if the unit will run unattended. The low-pressure regulator type (L) is selected where the working pressure sits below the standard regulator's range - the exact adjustment range for the low-pressure type is not published in the catalogue, so confirm it with us. This configuration includes a round gauge with a psi scale (the embedded square gauge with MPa/psi/bar scales is the alternative) and a reverse/check valve (K); it is ordered without a mounting bracket (J). Thread here is NPT; PT is the standard thread and G (BSPP) is available as an order option.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. The reflux valve permits reverse flow through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR400 series as curves in the catalogue, not as a single rated number, so we do not quote a figure here. Tell us your application and we will confirm the flow and sizing from the datasheet on request before you order.
The M in the code is the manual drain: condensate collected in the polycarbonate bowl is released by opening the drain by hand, which suits units checked on a routine schedule (automatic and differential-pressure drains are available on other codes). The L in the code is the low-pressure regulator type, selected for applications working below the standard regulator's range; the exact adjustment range for the low-pressure type is not published in the catalogue, so confirm it with us. This unit also carries a 5 um filter element, a round psi gauge and a built-in check valve.
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.