10.4.09

USEFUL FORMULAS

Some useful formulas for pump users

BHP( KW) : 0.163 x m3/min x head ( m ) x sg / efficiency ( % )
This is will indicate the BHP in Kw


Velocity ( m/sec )= Q ( M3 /HR ) X 353.60 / D2 ( pipe diameter in mm )

Recommcneded velocity
Suction Line : 0.5 to 1.2 m/sec
Discharge Line : 1 to 3 m/sec

Option : the lower the better , however it is piping cost versus power consumption
over a long term period .Greater saving on power if motor is bigger

see earlier posting on this issue

2.4.09

PUMPS REVIEW

1) ALFA LAVAL SOLID C
- very solid looking material and nice finishing
- can be mounted to IEC standard Foot Flanged motor
- one set of mechanical seal for all ranges of Solid C- low invertory cost
-Front loading shaft seal design ,the seal can be changed in minutes without removing the backplate
- complies with 3 A. CE and with EHEDG certification
- simple competitive and yet good operating life,only maintenance kit is one pcs of casing O ring and a set of mechanical seal