The AirTAC BF Air Preparation Filter BF4000 is a genuine A/B-line filter with PT1/2" ports. It is the compact air-preparation line, with 40 um standard / 5 um optional filtration and high water-separation. Flow is confirmed from the datasheet on request.
The BF4000 is a compact B-line air filter for 1/2 in PT ports. It removes water and particulate from compressed air - nothing more: there is no pressure regulation and no lubrication in this unit. The standard 40 um element provides high water-separation efficiency, condensate collects in the polycarbonate (PC) bowl and is removed via the default differential-pressure drain operated manually, and the B-line body carries a high-strength plastic protective cover over the bowl. Working pressure is up to 1.0 MPa (145 psi) at temperatures from -5 to 70 C (non-freezing).
This is a genuine AirTAC part from the compact B line, the larger of the two compact A/B bodies. The same filter is available in 1/8 in, 1/4 in, 3/8 in and 1/2 in port sizes, with automatic (A) or manual (M) drain variants, a finer 5 um (W) element, and G (BSPP) or NPT threads as order options where PT is not wanted. Flow figures are not published as a single rated number, so ask us to confirm sizing and request the datasheet for your operating point.
| Model | Airtac BF Air Preparation Filter BF4000 |
|---|---|
| Type | Air Filter |
| Line | B-line (compact A/B air preparation) |
| Port size | PT1/2" (PT thread) |
| Filter grade | 40 um standard, 5 um optional (W) |
| Fluid | Compressed air |
|---|---|
| Max. inlet pressure | 1.0 MPa (145 psi) |
| Temperature range | -5 to +70 C (non-freezing) |
| Bowl material | PC (polycarbonate) |
| Pressure drop | Low (catalogue-stated) |
Specifications follow the official AirTAC A/B-line air-preparation data. Drain type, filter grade, gauge and low-pressure options are set by the model-code suffix - see the description. Flow curves, weight and outline dimensions are not published in our data set — ask us and we confirm from the factory datasheet.
Step up to this B-line 1/2 in body when your branch line exceeds the A-line port class - confirm the required flow with us first, since these filters do not carry one published rated flow figure. The BF4000 comes with the default differential-pressure/manual drain; order the A suffix for automatic draining or M for purely manual control. The 40 um element is standard - add W for the 5 um grade where downstream equipment needs finer filtration. If your circuit also needs pressure regulation or oiling, the family offers the BFR filter-regulator and BFC two-unit set instead. PT is the standard thread; G and NPT are order options.
Installed on the 1/2 in drop feeding a machining center's pneumatic circuit, knocking bulk water and 40 um particulate out of shop air before it reaches directional valves, tool-change cylinders and air-assisted spindle seals.
Placed ahead of the blast cabinet's air feed, the filter strips moisture and pipe scale that would otherwise contaminate media and clog the gun. The manual drain is opened at shift end, and the B-line bowl cover adds protection in a rough work zone.
Mounted directly before a machine's valve manifold so rust particles and condensate from an aging header never reach the valve seats and cylinder seals - a low-cost first stage ahead of any regulator or lubricator fitted downstream.
AirTAC does not publish flow for the compact B-line filters as a single rated figure. Tell us your line pressure and air consumption and we will confirm the datasheet data and check that the 1/2 in body is correctly sized, on request, before you order.
The BF4000 ships with the standard 40 um element, which is right for general plant air and protection of valves and cylinders. If the downstream equipment needs finer cleanliness - precision instruments, sensitive pilot circuits or a final stage before coating - order the W variant with the 5 um element.