Suction damper for pumps
Flo-Dyne

Reciprocating pumps often suffer from pulsation problems on both the suction and discharge side. Many of the problems can be traced to poor suction conditions where the pressure at the inlet to the pump is less than that required by the pump manufacturer.

The suction pressure available at the inlet to the pump is often referred to as either NPSHa (Nett Positive Suction Head available) or NPIP (Nett Positive Inlet Pressure).

Fitment of a Flo-Dyne Suction Stabiliser at the pump suction will eliminate all NPSH problems and ensure a smooth running pump. For maximum effect the suction stabiliser may be combined with the Flo-Dyne liquid filled discharge pulsation dampener.

Every Flo-Dyne suction stabiliser works by exploitng three basic properties which each contribute to improve NPSHa;

suction stabiliserDampening Effect
Every suction stabiliser has a gas charge which,as it is obviously more compressible than the liquid being pumped, will provides a capacitance or spring effect which in turn will absorb the pulsation created by the abrupt flow change as the pump suction valves open and close.

Separation Effect
Flow through the suction stabiliser is slowed and rotated before leaving through the exit nozzle. By controlling the the transit time and flow velocities through the equipment entrained gases are encouraged to break out of solution and collect at the top of the stabiliser instead of passing directly into the pump inlet nozzle.
By reducing the quantity of entrained gas entering the pump
occurance of cavitation is further reduced.