Performance Pulsation Control Suction Stabilizers We put performance in our products
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Performance Pulsation ControlSuction Stabilizers
We put performance in our products
Why Suction Stabilizers?
• Pulsation Problems Start on the Suction Side!
• Appendage and Flow-Through Available
• Minimize pump cavitation
• Increase useful life of fluid-end parts
• Reduce cost of system ownership
Cavitation can cause 10X the standard pulsations normally produced = less pump life!
Operators look for discharge dampener failure, but unstable suction is typically the root cause
Suction Stabilizer
Why Suction Stabilizers?
Definitions
Ha = (LVNC)/gxk
= Acceleration head
= Actual length of suction line= Average liquid velocity in suction line
= Speed of pump crankshaft= Constant depending on pump type= Gravitational constant= Constant depending on fluid compressibility
Ha
LVNCgk
Acceleration Head Loss Formula
Flow-Through suction stabilizers isolate the pump from the remainder of the suction line = dramatic reduction of “L” line impact and overall less Acceleration Head Loss
Why Suction Stabilizers?
= Atmospheric Pressure
= Vertical distance from liquid surface to the pump centerline
= Friction losses in suction piping
= Acceleration head at pump suction= Absolute vapor pressure of liquid at pumping
temperature
PtHz
Hf
HaPvp
Definitions
NPSHa = Pt + Hz – Hf – Ha + Pvp
NPSH improved through reduction of Acceleration Head Loss
Suction Stabilizer Performance
Common Stabilizer Solutions
• Simple Gas Cap Tanks – Gas pocket above fluid column
• Gas Charged – Stabilizer with gas cartridge requiring maintenance or replacement upon failure.
• Maintenance-Free Flow-Through – Virtually no maintenance required. • Suction Cellular Stabilizer
• Reactive Stabilizer
Suction Stabilizers – Gas Cap
Gas Cap or “Stand Pipe” or “Air Tank” designs are seldom maintained
Gas cap rapidly absorbed by fluid = Elimination of effect and cavitation introduced
Suction Stabilizers – Gas Charged
Gas-Charged units separate the gas from the fluid via a cartridge, bladder, or cellular membrane = No gas absorption; More stable performance; Improved pump efficiency
Requires cartridge charging and replacement
Maintenance Free
Cellular Suction Stabilizer
Virtually no maintenance required = low life $ cost
Flow-Through Reduces Cavitation
Cellular Suction Stabilizer
Maintenance Free
Flow Through Suction Reactive Stabilizer
• Virtually eliminates Acceleration Head/Pressure Loss
• Applicable to harsher fluids and higher temperatures
• Promotes acoustic isolation
• Consistent performance over a broad range of pressures
Maintenance Free
Flow Through Suction Reactive Stabilizer
Maintenance Free
Maintenance Free Vertical Tank Suction Reactive
Things to Remember
• Suction Stabilizers - Critical to your fluid delivery and ultimate discharge performance
• Discharge Dampeners – Reduction of acceleration and flow-induced pulsations
• Maintenance Free Options – Initially more expensive, but long-term costs lower
• PPC Value – “Worry-Free Customer Experience”• Durable, High-Performance Solutions• Engineering expertise to customize designs and predict pulsation
performance• Expert project management for a “worry-free customer experience”
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