Đặc tính kỹ thuật bao gồm:
Lưu lượng: Tối đa 600 m3/h
Cột áp: Tối đa 90 m
Tốc độ: Tối đa 3600 vòng/phút
Vật liệu: Grey Cast Iron (OB, OC, OE)
và stainless steel 4B
Nhiệt độ: Tối đa 230 độ C
Áp suất vỏ bơm: PN 40
Shaft sealing: Sử dụng mechanical seal cân bằng không làm mát
Kết nối mặt bích: Vật liệu thiết kế
1B DIN EN 1092-2 PN 40
2B DIN EN 1092-1 PN 40
Chiều quay của bơm: Theo chiều kim đồng hồ khi nhìn từ hướng motor
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 application are
the energy productionheat transport andthe industry
and here mainly in systems where hot water as heat carrier is
given preference, despite its high system 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 energyconsumption by the pump and reduces the temperature level inthe mechanical seal chamber to less than 100 °C withoutexternal cooling circuit (see temperature curve on page 3). Theservice life of the mechanical seal increases considerably.A special design that automatically leads accumulation of gasto exhaust. Consequently the dry operation of the mechanicalseal can be excluded.A programme that comprehends 29 construction sizes and thusguarantees an optimal solution for every operating point.The back pull out design, which permits the removal of thecomplete, bearing unit towards the drive end without removingthe pump casing from the pipe work. If a spacer coupling isinstalled it is also unnecessary to disconnect the motor.
* Except for sizes 031125 to 031250
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 can 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
General remarks:
For equipping hot media systems a complete programme is available for a flow range between 1-600 m3/h consisting of the range:
ZDN volute pumps to DIN EN 22858, tmax 207 °C PN 25. Hot water designZHN volute pumps to EN 733, tmax 180 °C PN 16. Hot water design.ZLI volute pumps to EN 733 as INLINE construction, tmax 150 °C PN 25. Hot water design.ZTN volute pumps to EN 733, tmax 350 °C PN 16. Heat tranfer oil design.ZTK volute pumps to EN 733 close coupled design, tmax 350 °C PN 16. Heat transfer oil.ZTI volute pumps to EN 733 as INLINE construction, tmax 350 °C PN 16. Heat transfer oil.
Performance graph
Link download catalogue để tham khảo thêm: Catalogue bơm ZEND