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Performance Pulsation Control
Why Pulsation Control?
We put performance in our products
What is Pulsation?Performance of Reciprocating Pumps is Negatively Affected by Pulsation
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
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
HfHaPvp
Definitions
NPSHa = Pt + Hz – Hf – Ha + Pvp
NPSH improved through reduction of Acceleration Head Loss
