spereira
Chemical
- Mar 10, 2003
- 40
Hi, I have a question regarding liquid line pressure reducing devices: we have 3 condensate pumps running, discharging at 8.5 bar for two paralel circuits, one at 8 bar (lowest flowrate) and the other at 1.5 bar (highest flowrate). In order to optmize energy consumtion we're planning on changing the pumps in order to separate both circuits. For the low pressure circuit, a pressure loss of 5 bar is being carried out on the existing level control valves. We'll need to change these valves in order to decrease the pressure drop across them but, keeping one of the existing pumps as spare for both the new ones, if the low pressure pump fails the "old" one will need a pressure reducing device so that the new control valves will still operate in the stroke range defined by the supplier. If we use a restriction orifice (browsing the forum I've found the equations needed for the design) it will be adequate only for the flowrate it was designed for. however flowrate can vary signifficantly depending on the number of drums operating at a given moment. My question being, is a throthling valve the best alternative to the orifice?
Thks,
SPereira
Thks,
SPereira