KSB Vitachrom, Installation & Operating Manual

Page: 34 / 72

6 Commissioning/Start-up/Shutdown
34 of 72
Vitachrom
6.2.2 Frequency of starts
DANGER
Excessive surface temperature of the motor
Explosion hazard!
Damage to the motor!
▷ In case of explosion-proof motors, observe the frequency of starts specified in
the manufacturer's product literature.
The frequency of starts is usually determined by the maximum temperature increase
of the motor. This largely depends on the power reserves of the motor in steady-
state operation and on the starting conditions (DOL, star-delta, moments of inertia,
etc). If the starts are evenly spaced over the period indicated, the pump set can be
started up six times per hour (h) with the discharge-side gate valve slightly open.
CAUTION
Re-starting while motor is still running down
Damage to the pump (set)!
▷
Do not re-start the pump set before the pump rotor has come to a standstill.
6.2.3 Cleaning in place (CIP)
CAUTION
Elastomers do not have sufficient resistance
Damage to the pump!
▷ Effect cleaning/sterilisation only if the elastomer components used in the pump
(e.g. O-rings, mechanical seals) are made of EPDM or other approved materials.
Application CIP may be effected with the pump running or with the pump stopped.
Cleaning agents When CIP cleaning a system where the pump set is installed, make sure to comply
with the concentration limits, temperature limits and contact times given below for
the cleaning agents and disinfectants:
Table 13: Cleaning agents for CIP
Cleaning agents Concentration
(% b.w.)
Temperature t
[°C]
Contact time
[h]
Sodium hydroxide
(soda lye) 5 90 -
Phosphoric acid 3 90 ≤ 1
Hot water - 90 -
Lye (alkaline) 5 90 -
Nitric acid 2 50 ≤ 0.5
Peracetic acid or
hydrogen peroxide 0.5
1
40
20 ≤ 0.5
6.2.4 SIP (steaming in place)
WARNING
Pump casing takes on the same temperature as the sterilisation fluid
Risk of burns!
▷ Fit additional protective devices.
▷ Observe the general safety rules and regulations for steam applications.