Bolts; Duct Dimensioning And Installation; Requirements; Recommendations - Nederman E-PAK 150 DX Manual De Instrucciones

7.2.3

Bolts

Each of the anchor bolts securing E-PAK 150 DX/300 DX/500 DX is to
withstand traction forces of 6.5 kN vertically and 2.5 kN horizontally.
Recommended bolts for concrete are Hilti HDA-PF 20-M10×100/20. If
expansion bolts are to be used, the concrete foundation is to be prepared
according to bolt recommendations.
7.3

Duct dimensioning and installation

Figure 8 shows a typical vacuum duct system.
7.3.1

Requirements

Place a sign with the intended use of the vacuum system on every user
interface (workstation). Inform all personnel of the intended use of the system.
Ensure that personnel using the equipment does not collect items that may
cause ignition or blocking. Also, see Section 4.1.3 Isolation device.
NOTE!
All connected ducts are to be conductive and grounded.
WARNING! Risk of explosion.
Do not collect material that may cause ignition or blocking. It is strictly
prohibited to collect material that may undergo dangerous chemical or thermal
reactions and/or self-ignite.
7.3.2

Recommendations

Transport velocity
It is important to use the correct duct diameter to avoid pressure losses and
dust deposits in the duct system. Ensure that the correct transport velocity
is achieved. Correct velocity depends on the properties of the transported
material. Some applications may require velocities up to 25 m/s (82 ft/s). Take
velocity into account when choosing duct diameters. The velocity is never to
decrease on the way to the unit. The transport velocity in the ducts may vary
depending on how much of the vacuum system is used.
Flushing
To keep the ducts clean, a principle called flushing may be used. Flushing may
be applied by fitting a valve at the end of the duct system. By not using the rest
of the system, and opening the so called flush valve, a high amount of air will
flush the ducts clean. By flushing each branch of the vacuum system separately,
the risk of dust deposits is minimized.
In larger vacuum systems with multiple E-PAK 150 DX/300 DX/500 DX
installed, we recommend the installation of valves in order to isolate one
E-PAK 150 DX/300 DX/500 DX for maintenance while the others remain in
normal operation.
If the dust is abrasive, it may be necessary to use thick-walled (or rubber-
coated) material in bends and other exposed areas.
To avoid pressure losses, the duct system is to be as short as possible and
designed with two or more branches. Use larger diameters on the clean side to
reduce pressure losses.
E-PAK 150 DX/300 DX/500 DX EN
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