1. FEATURES

• Duckbill check valve adopts all-rubber materials in which include reinforced fibers, which has simple structure, non-corrosive performance and no mechanical parts.
• Duckbill check valve has strong operating performance, which can provide efficient and silent operation without any more energy device, reducing operating costs.
• Duckbill check valve is applicable to general operating conditions, and special conditions of wearing and corrosive mediums, such like water, sludge, and mud.
• Duckbill check valve has excellent effects of prevent of back flow.
• Duckbill check valve use differential pressure between its inside and outside to achieve open and close naturally, so that it’s the best choice of waste water drainage system and pipeline system.

3. STANDARDS

• Design & manufacturing: manufacturer’s standard
• Face to face: sanufacturer’s standard
• Inspection & testing: manufacturer’s standard