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6<br />
<strong>Descaling</strong> <strong>ValVes</strong><br />
Engineering And Service<br />
descaling systeM ValVe engineering<br />
• spray Water continuous Pre-Fill system<br />
• Pump By-Pass system(scheme-1,2,3)<br />
• manual isolation Valve<br />
• nozzle check Valve<br />
• letdown(Breakdown) restriction Orifice<br />
Flow inlet side<br />
From Pump<br />
electrical drain<br />
connection<br />
tP5<br />
By-Pass<br />
Outlet<br />
tP2<br />
electrical Poppet<br />
indicator<br />
tP4<br />
external air<br />
supply<br />
external tank 4<br />
connection<br />
1<br />
From Pump<br />
external air<br />
supply<br />
4<br />
external tank<br />
connection<br />
tP1<br />
2<br />
3<br />
1<br />
to system<br />
From Pump<br />
1<br />
tP1<br />
2<br />
to system<br />
tP3<br />
4<br />
P a<br />
t B<br />
external tank<br />
external air<br />
connection<br />
electrical drain 5<br />
connection<br />
tP2<br />
electrical Poppet<br />
indicator<br />
tP4<br />
tP3<br />
4<br />
P a<br />
t B<br />
external tank<br />
connection<br />
external air<br />
connection<br />
connection<br />
tP5<br />
By-Pass 3<br />
scheme 1: By-Pass Valve Only<br />
Outlet<br />
scheme 2: check Valve and By-Pass Valve<br />
external drain<br />
connection<br />
5<br />
external drain<br />
connection<br />
5<br />
tP2<br />
tP1 tP3 tP4 tP5 tP6<br />
Poppet<br />
electrical<br />
indicator<br />
The pump bypass valve is normally consisted with multistage<br />
letdown restriction orifice and flow patterner which<br />
is a patented flow turbulent straighten device. By Utilizing<br />
the flow patterer the outlet piping of Pump Bypass piping<br />
do not experience severe vibration and noise. even<br />
sudden surges due to on/off operation is eliminated.<br />
Orifice inlet<br />
letdown(Breakdown) Orifice<br />
scheme 3: Two Way system and By-Pass Valve<br />
2<br />
3<br />
to system<br />
By-Pass<br />
Outlet<br />
Flow<br />
Flow Patterner (Patented)<br />
letdown orifice and Flow Patterner<br />
<strong>KVT</strong> offer several kind of flow patterner to meet the descaling system requirements.<br />
Pressure letdown(Breakdown) Orifice
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