Views: 370 Author: Hardy Ho Publish Time: 2021-07-10 Origin: Better Silicone
Duckbill Bill Valve is one type of check valves & one-way valve with duck shaped bills & lips in aim to allow air or fluid liquid forward flow and also prevent back flow, which mainly made from silicone, liquid silicone rubber (LSR), EPDM, Buna n and other elastomer synthetic rubber.
Duckbill Valve as a flow control check valve should have rigid sealing with low or high opening pressure demands after slit cutting. However, in daily life, we face too many problem about duckbill valve:
Duckbill valve for Breast Milk Pump
Duckbill valve for Drainage
Duckbill Valve for Water Bottles Cap
Silicon rubber flashing remain in slit-cutting location will affect duckbill check valve’s sealing effects.
Issue of Die-cutting mould positioning
Cut silicone rubber materials out of valves, that will like spraying nozzle and can’t prevent backflow function.
Small gaps & not cutting (knife tooling is blunt or insufficient strength die-cutting)
High-tensile & elastic silicone and LSR: Raw rubber content of rubber materials will affect check rebound resilience. Generally, high-tensile strength silicone and liquid silicone LSR is better sealing effect.
Silicone Hardness Problems: Different hardness will affect rebound resilience
Vulcanization Problems: Many manufacturers would not like deal with secondary cure process after molded production in aim to save processing cost. Without additional vulcanization, physical properties of silicone can't achieve desired effects, and also harmful materials or elements easily remains in silicone duckbill valve.
Compression Deformation: Packaging bags filled with air in aim to avoid deformation when delivery
What have we done for customers about duckbill check valve?
l In-depth knowledge of die-cutting tools for slit cutting valve
l In-depth knowledge of elastomer silicone rubber materials as duckbill check valve
l Rich production experience: silicone rubber compression molded & liquid silicone injection molded production, slit-cutting process, and packing information
l In-depth knowledge of fluid- and air- fluid flow control technology
l Experienced R&D engineers for duckbill check valves moldability analysis, design improvement, draw 2D & 3D design duckbill drawings according to tubing connectors or assembled samples.