KRAL KV - 15 Accessories; Heating; Possible Types of Heating; Electrical Heating System

15 Accessories
15.1 Heating
15 Accessories
15.1 Heating
15.1.1 Possible types of heating
The pump can optionally be equipped with a heating system. The manufacturer recommends a heating
system at high-viscosity pumped liquids that do not flow sufficiently if not heated. This can result in ex-
cessive wattage or in problems arising through cavitation or sealing.
Possible types of heating:
o Electrical heating system
o Fluid heating system
o Special heating system
15.1.2 Electrical heating system
072
481
1
Fig.11: Electrical heating system
072 Heating cover
481 Heating element
1 Connecting cable
The electrical heating system consists of one or two heating elements481 that are integrated in a heat-
ing cover 072 attached additionally to the end cover. The output of the elements corresponds to the ra-
diation losses and convection losses of the pump in the required temperature range so that overheat-
ing is not possible.
Size5–118 Size160–2900
1 heating element 2 heating elements
1 heating cover 1 heating cover
4 socket screws 4 socket screws
Tab.13: Scope of delivery of electrical heating system
Operating data
Parameter Unit Value
Voltage [V] 230
Frequency [Hz] 50/60
Wire cross-section [mm
2
] 2 x 1
Tab.14: Operating data electrical heating system
Heating-up period
Required heating-up period for temperature differences of 30°C or 50°C:
Size Wattage Heating-up period [min] at a temperature difference of
[W] 30°C 50°C
5–42 1 x 100 20 35
55–118 1 x 220 20 35
160–275 2 x 180 25 45
370–450 2 x 180 30 60
550–660 2 x 250 45 75
851–1301 2 x 250 60 90
1500–1700 2 x 250 75 120
2200–2900 2 x 250 90 150
Tab.15: Heating-up period for electric heating system
40
OIK 09en-GB Edition 2019-11
Operating instructions