Volute pumps for hot water up to 230 °C SIHISuperNova ZEND 031125 ... 1252500 pages

Volute pumps
for hot water up to 230 °C
SIHISuperNova
ZEND 031125 ... 125250
PUMPTECHNOLOGY ZEN P I / 41
133.65601.58.01 E 01/2005
TECHNICAL DATA
Output: max. 600 m³/h
Delivery head: max. 90 m
Speed: max. 3600 rpm
Temperature: max. 230 °C
Casing pressure: PN 40
Shaft sealing: balanced standard mechanical
seal uncooled
Flange connections: material design 1B DIN EN 1092-2 PN 40
2B DIN EN 1092-1 PN 40
Direction of rotation: clockwise, when looking at the
pump from the drive end
APPLICATION
The volute pumps of the series ZEND are part of the overall
programme heat transfer and circulation pumps. They are
primarily used for circulation of hot water in closed pipe and
vessel systems.
Therefore their fields of applications are
the energy production
heat transport and
the industry
and here mainly in systems where hot water as heat carrier is
given preference, despite its high systems pressure, over oil as
heat carrier.
DESIGN
Horizontal, single-stage volute pumps with dimensions and nominal
ratings to DIN EN 22858 in back pull out design, with uncooled
balanced mechanical seal.
The series ZEND has especially been designed for the trouble free
handling of hot water up to 230 °C and is distinguished by:
• A double heat barrier that causes an optimal energy
consumption by the pump and reduces the temperature level in
the mechanical seal chamber to less than 100 °C without
external cooling circuit (see temperature curve on page 3). The
service life of the mechanical seal increases considerably.
• A special design that automatically leads accumulation of gas to
exhaust. Consequently the dry operation of the mechanical seal
can be excluded.
• A programme that comprehends 29 construction sizes and thus
guarantees an optimal solution for every operating point.
• The back pull out design, which permits the removal of the
complete bearing unit towards the drive end without removing
the pump casing from the pipe work. If a spacer coupling is
installed it is also unnecessary to disconnect the motor.
CONSTRUCTION
Casing pressure
max. 40 bar from 0 °C to 120 °C
max. 35 bar from 120 °C to 200 °C
max. 32 bar from 200 °C to 230 °C
Intermediate values con be obtained by interpolation.
Please note:
Technical rules and safety regulations.
max. casing pressure = inlet pressure + zero head
max. test pressure = 52 bar
Flanges location:
Axial suction flange, discharge flange radially upwards.
Flanges:
The flanges comply with DIN EN 1092 part 1 and part 2
resp. PN 40.
Flange design to ANSI 300 is possible.
Hydraulic:
Designation of this construction type: A.
Bearing:
One grease-lubricated, reinforced antifriction bearing to DIN
625 and one internal liquid flushed sleeve bearing.
Designation of this construction type: S
Direction of rotation:
Clockwise, when looking at the pump from the drive end.
Shaft sealing:
Code BG3: balanced standard mechanical seal
seal face materials SIC/carbon
elastomer EPDM