Operating instructions B-Series
Version 2.4, En Page 52 of 81 21-10-2005
Shaft seal
Check the presence of sealing and/or rinsing water, as well as the pressure, temperature and connections.
If the pump is provided with a sealing liquid and/ or rinsing water connection, this must be turned fully
open in the supply line.
Check whether the mechanical shaft seal for the start-up of the pump needs a pre-pressure for any sealing
liquid and/or rinsing water connection.
Extra point(s) for attention with ATEX pumps.
K6a.
K6b.
M6.
M8.
M9.
P3.
P5.
P6.
G9.
G10.
S7.
B2a.
B2b.
B5.
Ensure a correct mechanical shaft seal choice for the
liquid to be pumped. ∗
∗∗
∗
• The ignition temp. of the coolant must be at least 50 K above the max. surface
temp. of the pump (EN 13463-5:2003 §4.5).
• Provide a seal with extra guarantee agains
t leakage when pumping volatile liquid.
Ensure a correct auxiliary system for the mechanical shaft seal. ∗
∗∗
∗
• Take account of the flow and pressure in the pump.
• Take account of the interaction of the auxiliary liquid with the medium to be
pumped.
The auxiliary system must itself be EX, cat. 2. Here also note:
∗
∗∗
∗
• What is the outside temp. of the auxiliary system?
• Can the auxiliary system guard against the build-up of ignitable gas inside?
Check the resistance list to ensure that assembled elastomers are suitable for the
pumped medium. ∗
∗∗
∗
Ensure the good assembly of the mechanical shaft seal as indicated by the
supplier.
Ensure the good assembly of the auxiliary system as indicated by the supplier ∗
∗∗
∗.
Make sure that the pump (unit) is mechanically well shielded while operating.
Ensure the correct coolant for the mechanical shaft seal.
Ensure the correct coolant and temperature for the medium to be pumped.
Make sure that the mechanical shaft seal cooling/lubrication is in good working
order.
Ensure sufficient coolant.
If a leak occurs to the mechanical shaft seal: stop the pump.
Ensure regular checks for leakage and adjust if necessary.
Choice of seal only to be determined after consultation with the supplier.∗
∗∗
∗
• With extra guarantee against leakage
• Only when pumping volatile liquid.
• Apply safety device for coolant presence.
• (Only with Cat. 2 pumps)
Protect pump against temperature.
• (Only with Cat. 2 pumps)
∗
∗∗
∗ With an Ex-pump (unit) supplied by BBA Pompen these aspects are ensured for the application
indicated by the client with the associated indicated medium.
Dangers relating to
the software:
It is the responsibility of the employer to ensure that the safety
measures (such as protection against temperature) and the
resulting action (such as the stoppage of the pump) are
appropriately included in the safety circuit.
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