Suction Stabilizers : Stabilize Flow & Pressure / Save Energy

Suction Stabilizers stabilize the flow and pressure in the supply to the suction inlet of pumps. Suction Stabilizer : full technology. WHAT DOES A SUCTION STABILIZER DO ? A suction stabilizer improves volumetric efficiency, prevents cavitation, reduces discharge surge and pulsation, increases pump life, and saves energy.

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WHY ARE SUCTION STABILIZERS NEEDED ?
Suction systems experience instability caused by :

1. Sudden pump start, which attempts to jerk the liquid into motion.
2. Repeated low pressure spikes from reciprocating motion machine suction check valve openings.
3. Flow control by "Spill Back" into suction lines.

SUCTION INSTABILITY ,
more precisely :

• 1a) Pump start jerk produces a pressure fall, which may pull gasses out of solution, and break the supply column, exhibiting unstable flow.
• 2a) Check valve low pressure transients, produce high frequency reverberations in the suction line, making bubbles in the liquid.
• 3a) Spill back injects "frothing" into the suction pipe, destabilizing continuous "solid" mass transfer.

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SUCTION STABILIZERS AND " ACCELERATION HEAD "

• All of 1 , 2, & 3 are variations of the suction acceleration head stability, so that suction stabilizers may be referred to as "acceleration head dampeners".

SELECTION
Suction Stabilizers are selected to produce acceptable acceleration head figures for :

1. each pump type,
2. for the vapor pressure at temperature of each liquid,
3. its specific gravity, and
4. length of suction supply column.

• All of i. thru iv. , at least, must be disclosed to a suction side pulsation damper supplier for the suitable selection of a suction stabilizer.

RESULT

• When a suitable suction stabilizer is chosen, stable flow and pressure is provided to the pump inlet, enabling it to stay properly filled, which then produces a more constant output, and so avoid undue discharge surge and or pulsation.

A SUCTION STABILIZER IS :

1. The best value lowest cost greatest improvement to a pumping system; AND is a low pressure container that :
2. Intercepts suction pressure occurrences stopping them from passing back the feed pipe.
3. Provides a mass of liquid close to the pump inlet, to enable it to take in volume without having to instantaneously accelerate the whole of the weight of the inlet column.
4. Prevents suction cavitation. V Has the capable of recovering more than 99% of acceleration head losses .
5. Is a specialty consideration of rotating equipment engineers.

NOTE :

• SEE API 674 and 675 for advice on proper suction system modeling. Search on the nomenclature "Pulsation Suppression Devices"

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ASSOCIATED PHRASES Acceleration Head Loss Prevention Suction Side Cavitation Lost volumetric Efficiency Velocity Jump / Joukowsky shock Intermittent supply supply disruptions Net Positive Suction Head Suction Starvation incomplete filling supply discontinuity prevention