Metering Pumps _ High Suction Head and High Vacuum in Delivery Line

There was installations where the suction head is  higher than delivery head and
or delivery line under high vacuum

This causing syphoning , and flowrate will not be be accurrate , often very much higher than
set at the Metering pump .

Solution
a) Installing a back Pressure Valve
b) pressure loading valve
or
c) Installing a Pressure relief valve to the Pipeline or vessel under high vacuum

This (c) is the simplest cost effective solution

Postings Over the years

We had posted several issue on pumps and pumping , summary is as follow

a) Vacuum Pump ~ vacuum problem
b) Energy /power cost in pumping
c) Heating Syste, problem
d) Air Entrained in pumps cuasing cavitation
e) Using same pump for both loading /unloading
f) Installation of pumps
g) Noise Level ~ motors &pumps
h) Palm oil Mill effluent ~land disposal
i) Mining Pump ( sand ) ~ Bidor Perak
j) Plate Heat Excahnger Trouble Shooting
k) Cavitation : Cause & effects
l) Understanding Sanitary for SMEs
m) Velocity
n ) Pump Upgrading ~steps to be taken
o) LiqRing Vacuum Pump ~ cavitation shared by one of User
p) General rules is selection pumps

We look foward to contributions from Pumps User /Engineers in this field

For those Plant /User in Johor Malaysia , feel free to contact us if you need training
covering
a) Maintenance & Preventive maintenance
b) Selection of pumps
c) terminalogy on pumping