SUCTION SILENCER MANUFACTURER SUCTION SILENCER 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 (Net Positive Suction Head available) or NPIP (Net Positive Inlet Pressure). Fitment of a BCS Suction Silencer at the pump suction will eliminate all NPSH problems and ensure a smooth running pump.