Why Pulsation Control
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Transcript of Why Pulsation Control
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Performance Pulsation Control
Why Pulsation Control?
We put performance in our products
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What is Pulsation?Performance of Reciprocating Pumps is Negatively Affected by Pulsation
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Why Pulsation Control?Case Study: 6.5” plungers before and after discharge dampener @5000psi operating pressure:
Reduced to 175 psi 72% improvement
630 psi Pressure Variation
Without Dampener With Dampener
Potentially violent and unsafe piping system vibration
Which would you prefer? Prolong Pump Life and Maximize Efficiency
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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
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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
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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
HfHaPvp
Definitions
NPSHa = Pt + Hz – Hf – Ha + Pvp
NPSH improved through reduction of Acceleration Head Loss