Compatible Fullwood Diaphragm 043111 The Compatible Fullwood Diaphragm 043111 is a replacement membrane component used in Fullwood pulsation / milking systems. It’s designed to flex under vacuum and pressure cycles, controlling or modulating air flow or pulsation in the milking cluster / pulsator system. This diaphragm is critical for ensuring correct pulsation timing and vacuum stability — any wear, cracking or fatigue can alter milking performance, leading to irregular pulsation, incomplete milk extraction, or liner slipping. Restore optimal pulsation performance in Fullwood milking systems with the 43111 Pulsation Diaphragm. Made from durable, flexible elastomer, this precision membrane ensures consistent cyclic airflow, reliable vacuum sealing, and long operational life.