Bolts; Duct Dimensioning And Installation; Requirements; Recommendations - Nederman E-PAK 500 Bedienungsanleitung

6.2.3

Bolts

Each of the anchor bolts securing E-PAK 500 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.
See also Section '4.2 Dimensions'.
6.3

Duct dimensioning and installation

Figure 5 shows a typical vacuum duct system.
6.3.1

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.
NOTE!
All connected ducting is to be conductive and grounded.
WARNING! Explosion risk.
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.
6.3.2

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 500 installed, we recommend the installation
of valves in order to isolate one E-PAK 500 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.
7

Installation

7.1

Installing E-PAK 500

WARNING! Risk of personal injuries.
The outlet silencer and fan may reach high temperatures during normal operation.
E-PAK 500 EN
25