Diaphragm actuator
Diaphragm actuator
(OP)
Could someone advice the advantages of multi spring diaphragm actuator vs.
single spring diaphragm actuator or piston actuator?
Or the reason to use it?
single spring diaphragm actuator or piston actuator?
Or the reason to use it?





RE: Diaphragm actuator
RE: Diaphragm actuator
The general answer is as danw2 has described.
In addition to reversing the 'normal' state (open vs. closed) several springs (equal or different, one inside the other or 'parallell') gives a higher number of possibillities to regulate the force and speed of opening/closing movement, or balancing (dampening)regulation force (if regulation valve) than a single spring actuator. Several springs will also give a possibillity to build the actuating devices smaller, and might give a more centered and paralleld movement in some cases.
RE: Diaphragm actuator
max upstream pressure is 5.6 bar and delta p is 0.1 bar.
Straight globe valve is used.
What I understand is there is no specific application that forces to have multi spring type
but it is more for preference from operation point of view.
RE: Diaphragm actuator
I presume this is the normal situation without much variation. In this case it is a fairly simple application and a 'standard' valve and actuator could well be used.
Upgrading quality in this case would be looking into valve-constructions (and actuators) that could give a lower
cost/lifetime. That could mean a higher quality and higher buying cost, but lower maintenance cost and longer standtime/lifetime.
To mention only one problem (world-wide): valves of too low quality remaining in one position in years, failing to close, open or thightening properly when finally operated. ( Higher quality and/or regular operation tests should hae been done)