Modulating types Butterfly Valves
Modulating types Butterfly Valves
(OP)
hi All,
I need valve professionals to reply my below question.
In sand filters and backwash applications, MODULATING electro-pneumatic butterfly valves is preferred to use for filing, rinsing and backwash, why they do not use ON-OFF butterfly types?
Why MODULATING??
The below web link for reference.
http: //www.fest o.com/rep/ cs_cz/asse ts/pdf/Rie ger_IA_Val ves_EN.pdf
Thanks in advance
Kandeloo
I need valve professionals to reply my below question.
In sand filters and backwash applications, MODULATING electro-pneumatic butterfly valves is preferred to use for filing, rinsing and backwash, why they do not use ON-OFF butterfly types?
Why MODULATING??
The below web link for reference.
http:
Thanks in advance
Kandeloo





RE: Modulating types Butterfly Valves
In addition to this you may consider a water and a water and air wash. They have different flow rates.
This is not a question for valve suppliers but for water treatment engineers. Your OP would be better in the Water Treatment & Distribution forum.
"Sharing knowledge is the way to immortality"
His Holiness the Dalai Lama.
http://waterhammer.hopout.com.au/
RE: Modulating types Butterfly Valves
Agree with stanier (good post). Another thing is the modulator type discussion (electro pneumatical) compared to electric, and the parameters of operating a modular butterfly valve without getting cavitation (low pressure differences, slow flow).
But if we start this discussion, we are starting getting far out on a side-branch.
(Pneumatic contra electric operators both have some 'religious' fanatics.)
RE: Modulating types Butterfly Valves
"Sharing knowledge is the way to immortality"
His Holiness the Dalai Lama.
http://waterhammer.hopout.com.au/