0102030405
Suzhou Menhow Achieves New Technological Breakthrough: Granted Utility Patent for Innovative Duckbill Valve Structure
2026-04-22
Suzhou Menhow has recently obtained the national utility patent authorization for its self-developed innovative duckbill valve structure, as publicly disclosed by the China National Intellectual Property Administration (CNIPA). With an innovative rib-sealing design, the patent effectively addresses the long-standing industry pain point of leakage in conventional duckbill valves under low-pressure or reverse-flow conditions, marking another addition to the company’s core competitiveness in fluid control and sealing technology.
Core Technical Highlights: Solving Leakage Issues at the Structural Root
Traditional duckbill valves rely on the elastic deformation of the valve nozzle to open and close. However, after prolonged use or under conditions of low pressure differential and micro backpressure, gaps tend to form on the mating surfaces of the valve nozzle opening, resulting in medium leakage and backflow that compromise system stability. Suzhou Menhow’s new patented design specifically addresses this industry challenge:
● Innovative Rib-Sealing Structure: By adding at least one set of correspondingly arranged ribs on the symmetrical side walls of the slit opening of the valve nozzle, the design significantly increases the contact area and fitting tightness when the valve nozzle is closed, upgrading the sealing performance from “line contact” to “surface contact”.
● Optimized Hydrodynamic Performance: The integrated design of the cylindrical valve seat and conical valve nozzle ensures low flow resistance during forward flow, while enhancing the sealing response speed under reverse pressure, adapting to a wider range of operating pressure conditions.
● Long-term Reliability with Zero Maintenance: The wear-resistant reinforced ribs reduce abrasion on the sealing surface during operation, extending service life and lowering maintenance costs.
Traditional duckbill valves rely on the elastic deformation of the valve nozzle to open and close. However, after prolonged use or under conditions of low pressure differential and micro backpressure, gaps tend to form on the mating surfaces of the valve nozzle opening, resulting in medium leakage and backflow that compromise system stability. Suzhou Menhow’s new patented design specifically addresses this industry challenge:
● Innovative Rib-Sealing Structure: By adding at least one set of correspondingly arranged ribs on the symmetrical side walls of the slit opening of the valve nozzle, the design significantly increases the contact area and fitting tightness when the valve nozzle is closed, upgrading the sealing performance from “line contact” to “surface contact”.
● Optimized Hydrodynamic Performance: The integrated design of the cylindrical valve seat and conical valve nozzle ensures low flow resistance during forward flow, while enhancing the sealing response speed under reverse pressure, adapting to a wider range of operating pressure conditions.
● Long-term Reliability with Zero Maintenance: The wear-resistant reinforced ribs reduce abrasion on the sealing surface during operation, extending service life and lowering maintenance costs.
With over 20 years of expertise, Suzhou Menhow has long focused on the R&D and manufacturing of precision components such as liquid silicone rubber products and flexible printed electronic. Backed by IATF16949 quality system certification and proven experience serving leading clients including Bosch and Philips, the company has built a full-spectrum technical advantage spanning material formulation, precision molding, and custom design. The launch of this new duckbill valve patent represents another key technological breakthrough in the fluid sealing sector, further enriching the company’s product portfolio for environmental protection, industrial control, and other fields.