Dual-Channel Anti-Backflow Valve

These replacement duckbill valves measure approximately 2.5 cm in total length (with ±1–3 cm manufacturing tolerance) and combine flexible food-grade silicone flaps with durable polypropylene (PP) bodies. Supplied as a pack of 8, they are intended for routine replacement to maintain optimal pump function and hygiene. Engineered around a true dual-channel layout, each valve keeps milk and air in physically separate pathways — ensuring zero crossover between fluid and mechanical sections. This eliminates risks of motor corrosion, bacterial growth inside tubing, and unintended milk expulsion during pauses or transitions. The silicone diaphragm responds dynamically to pressure differentials, while the duckbill opens only when suction is applied and seals instantly upon release — supporting silent, spill-free operation ideal for workplace or public use.