The AirTAC GFR400-15LF2WK AirTAC Filter Regulator 1/2 in PT, 5 um 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 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 GFR400-15LF2WK is an AirTAC GFR400 filter regulator: water and particulate filtration plus downstream pressure regulation combined in a single body, sized for a 1/2 in PT port. This configuration is the low-pressure type, so it suits circuits that run at reduced working pressure rather than full line pressure. It carries a 5 um filter element (the finer of the two catalogue grades), a differential-pressure drain that bleeds collected condensate automatically as the pressure differential across the element builds, a built-in reverse/check valve that holds downstream pressure when the upstream supply drops, and an embedded square gauge reading in psi so the set pressure is visible at the unit.
This is a genuine AirTAC part. The GFR filter-regulator family spans sizes 200, 300, 400 and 600 with ports from 1/8 in to 1 in, and is offered with a choice of drain type, 40 um or 5 um filtration, gauge scale, thread (PT standard, G and NPT to order) and bracket. Flow is published as curves rather than a single rated figure, so ask us to confirm the datasheet and sizing for your application before ordering.
| Model | GFR400-15LF2WK AirTAC Filter Regulator 1/2 in PT, 5 um |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (PT thread) |
| Filtering grade | 5 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 — square, 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". |
| (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). |
| F | Gauge shape: Square. 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. |
| (blank) | PT 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) |
Feeds filtered, regulated air at reduced pressure to carton-sealing and case-erector cylinders on a packaging line, with the 5 um element protecting the directional valves and the check valve holding the circuit while the compressor cycles.
Supplies clean, regulated air to pneumatic clamps and swing cylinders on a CNC machining cell, where the square psi gauge lets the setter verify holding pressure at the fixture and the differential-pressure drain keeps condensate out of the valves.
Serves a conveyor section that uses air jets for product stabilising plus small actuators for diverters and stops, combining filtration and regulation in one body at the 1/2 in take-off point instead of two separate components.
Step up or down through the GFR sizes (200/300/400/600) to match the port and the flow your line needs - the 400 size with its 1/2 in PT port sits in the middle of the range. Choose the 5 um element (this code, suffix W) when downstream valves or instruments need finer air than the standard 40 um grade. The differential-pressure drain fitted here needs no operator attention; automatic (A) and manual (M) drains are available on other codes if you prefer a timed or hands-on approach. The embedded square gauge is set to psi here; MPa and bar scales and an external round gauge are alternatives. PT is the standard thread, with G (BSPP) and NPT as order options, and a bracket is included for panel or wall fixing.
One honest note on sizing: AirTAC publishes flow for this family as curves, not as a single rated number, and the low-pressure type's regulation range is not stated as a standard figure either. Send us your target pressure and flow and we will confirm the fit against the datasheet before you order.
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 GFR family as curves rather than a single rated figure, so we do not quote a l/min or SCFM number. Tell us your required flow and working pressure and we will confirm the sizing against the datasheet on request before you order.
The L code marks this as the low-pressure regulator variant, intended for circuits that run below standard line pressure; its exact regulation range is not published as a standard figure, so we confirm it on request. The drain is the differential-pressure type: condensate collected in the PC bowl is discharged automatically as the pressure drop across the 5 um element builds, with no manual draining needed.
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.