The AirTAC GFR400-15 AirTAC Filter Regulator PT1/2, 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: one body that removes water and particulate from compressed air and holds downstream pressure at your set point. This size 400 unit carries a PT1/2 (1/2 in) PT thread, a 5 um filter element for finer particle capture than the standard 40 um grade, and a manual drain you open by hand to empty collected condensate. A square pressure gauge (psi scale) is fitted so you can read and adjust the outlet setting, and a reverse/check valve is fitted to hold downstream pressure if the supply drops.
This is a genuine AirTAC part in the GFR family, which spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, drain, filter-grade, gauge and thread options. Maximum inlet pressure is 1.0 MPa (145 psi); the regulation range for this manual-drain configuration is 0.05-0.9 MPa (7-130 psi); operating temperature is -5 to 70 C, non-freezing. Flow is published as curves rather than a single rating, so ask us to confirm sizing figures from the datasheet for your application.
| Model | GFR400-15 AirTAC Filter Regulator PT1/2, 5 um, Manual Drain |
|---|---|
| Series | GFR400 filter regulator |
| Port size | PT1/2" (PT thread) |
| Filtering grade | 5 µm |
| Regulating range | 0.05 - 0.9 MPa (7 - 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 | Manual 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. Standard type, regulating 0.05 - 0.9 MPa (7 - 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. |
|---|---|
| 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)). |
| (blank) | Standard 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) |
Where a 1/2 in branch line feeds a whole machine cell, this unit cleans the air of water and particles and holds a steady set pressure for every cylinder and valve on that drop, with the psi gauge giving operators a visible set point.
Conveyor diverters, clamp cylinders and packaging heads need clean, regulated air to repeat their stroke consistently; this filter regulator conditions the 1/2 in supply line feeding those devices and the check valve helps hold the circuit if upstream pressure dips.
Fixture clamps and workholding cylinders depend on stable pressure to hold parts safely; the 5 um element limits fine contamination reaching the clamp valves, and the regulator keeps clamping force consistent across the shift.
Start with the port and size: this GFR400-15 steps up to 1/2 in PT threading for lines that need more air than the 300 size feeds, but the right step depends on the flow your actuators and tools actually draw - we confirm that from the published flow curves before you order. Drain type is a real choice: manual drain (this unit) is simple and dependable where someone walks the line; automatic drain empties the bowl unattended; the default differential-pressure drain triggers on the pressure drop across the element. The 5 um element (code W) suits finer protection than the standard 40 um grade. Gauge scale is selectable (MPa, psi or bar) and this unit carries the psi square gauge. Thread is PT as standard, with G (BSPP) and NPT available to order; a mounting bracket is included.
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, not as a single rated number, so we do not quote one. Tell us your line pressure, set pressure and the air your equipment consumes, and we will confirm the sizing from the datasheet curves before you order.
A manual drain means someone opens the drain by hand to empty collected water, which suits attended lines on a regular walk-round; automatic or differential-pressure drains suit unattended installations. The 5 um element (code W) captures finer particles than the standard 40 um grade, giving cleaner air to sensitive valves and tools.
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.