Wartsila 31 Product Manual page 104

9. Cooling Water System
9.3.10.3 Preheating unit (4N01)
A complete preheating unit can be supplied. The unit comprises:
● Electric or steam heaters
● Circulating pump
● Control cabinet for heaters and pump
● Set of thermometers
● Non-return valve
● Safety valve
Fig 9-10
Heater capacity
9.3.11 Throttles
Throttles (orifices) are to be installed in all by-pass lines to ensure balanced operating conditions
for temperature control valves. Throttles must also be installed wherever it is necessary to
balance the waterflow between alternate flow paths.
9.3.12 Thermometers and pressure gauges
Local thermometers should be installed wherever there is a temperature change, i.e. before
and after heat exchangers etc.
Local pressure gauges should be installed on the suction and discharge side of each pump.
9-16
Preheating unit, electric (3V60L0562C).
Pump capacity
[kW] [m³/h]
50 Hz 60 HZ
18 11 13
22.5 11 13
27 12 13
30 12 13
36 12 13
45 12 13
54 12 13
72 12 13
81 12 13
108 12 13
Weight Pipe conn.
[kg]
In/outlet A
95 DN40 1250
100 DN40 1050
103 DN40 1250
105 DN40 1050
125 DN40 1250
145 DN40 1250
150 DN40 1250
187 DN40 1260
190 DN40 1260
215 DN40 1260
Wärtsilä 31 Product Guide - a1 - 18 October 2016
Wärtsilä 31 Product Guide
Dimensions [mm]
B C D E
900 660 240 460
720 700 290 480
900 700 290 480
720 700 290 480
900 700 290 480
720 755 350 510
900 755 350 510
900 805 400 550
900 805 400 550
900 855 450 575