negative pressure control
negative pressure control
(OP)
which valves can we use for the following problem.
up till now we create a negative pressure(-30mbar) in 4 subtanks (+/-10cl, half fluid & half air) with one vacuumpump. So each tank shows -30mbar.
if we want to control the negative pressure in each tank
individually (example tank1 : -28mbar, tank2 : -31mbar,...),
should we work with valves? What kind of valves?
If we use different tube-diameters for each subtank, would the negative pressure be influenced? Maybe the time to create the negative pressure will be extended with smaller diameter but it will reach the wanted value anyway?
Thanks!
up till now we create a negative pressure(-30mbar) in 4 subtanks (+/-10cl, half fluid & half air) with one vacuumpump. So each tank shows -30mbar.
if we want to control the negative pressure in each tank
individually (example tank1 : -28mbar, tank2 : -31mbar,...),
should we work with valves? What kind of valves?
If we use different tube-diameters for each subtank, would the negative pressure be influenced? Maybe the time to create the negative pressure will be extended with smaller diameter but it will reach the wanted value anyway?
Thanks!
RE: negative pressure control
the valves are dictated by the pressure drop and flow requirement, your materials of constructions and how much money you have to spend. it is a routine design issue and has been done many times.
RE: negative pressure control
But don't compare earthworm to anakonda, size does matter
Regards,
RE: negative pressure control
The actuator performance will be critical to the solution success. Consider the Emech high speed (~1.3 seconds/90 deg) and high stroke resolution (0.03deg), electric actuator with a built in closed loop controller as a possible 'stand-alone' solution.