Introduction
The comprehensive range of ductile iron check valves manufactured by Di Nicola represents the pinnacle of technological safety for pipeline protection against sudden backflow reversals and destructive transient surges. Developed to fulfill the most demanding civil and industrial engineering specifications, this dynamic collection includes high-performance swing check valves, specialized Venturi check configurations, compact spring-loaded units, double flap wafer variants, full bore self-cleaning ball check elements, and double eccentric double flanged tilting check designs complete with custom counterweight levers. Every model is streamlined to guarantee instantaneous fluid closure and bubble-tight isolation, blending superior mechanical shell resilience with advanced shock-damping characteristics. After all, gravity never takes a day off, and neither do our check systems.
Key Features
Advanced hydrodynamic modeling featuring full bore internal geometries shaped to optimize fluid velocity, reduce flow resistance, and fully eliminate stagnation pockets or sediment buildup. Multi-position field installation flexibility driven by flanged, threaded, or wafer body styles perfectly rated for horizontal, vertical, or battered pipe layout settings. Specialized ball check mechanisms utilizing a high-efficiency self-cleaning motion and quiet closing profiles, making them ideal for raw sewage pumping stations or highly viscous media containing suspended solids. Internal drive trims, stems, pivot pins, and return springs manufactured exclusively from high-tensile stainless steel or bronze to entirely rule out binding or early material galling. Heavy-duty interchangeable rubber seats or high-precision metal-to-metal seals enabling straightforward on-site inspection and rapid maintenance routines through removable top covers without disconnecting the valve shell from the primary line.
Technical Data Table
Applications and Benefits
- Waterworks infrastructures, aqueducts, and municipal transmission lines: Insulates pumping systems from transient backflows while entirely absorbing dangerous hydraulic shocks.
- Wastewater processing environments and municipal sewage networks: Delivers clog-free continuous performance driven by flanged or threaded ball elements matching full bore parameters.
- Pumping chambers and complex industrial utility systems: Maintains highly stable hydrodynamic capacities and hermetic zero-leak sealing under sharp thermal or chemical variations.
Why Choose Our Products
Di Nicola manufactures non return valve type swing check , Venturi , double swing , Clasar type , ball type , butterfly type in ductile iron and high nickel content alloys for extreme corrosion from over fifty years with dimensions between 40 and 1800 mm and nominal pressure 2.5 bar , bar 6 , 10 bar , 16 bar and 25 bar . The non-return valves Di Nicola are coated with epoxy resin with minimum thickness of 150 micr . With marked according to EN ISO 19 and spacings between flanges according to DIN 3202 , BS 5150 , ISO 5752 , ASME B16.10 , Flanges according to EN 1092. – 2 , ISO 2531, BS4504 and various other standards, certified EN 10204 3.1 . The company Di Nicola produces non-standard at the request of customers.
The precise continuous pressure drop charts, capacity Kv factor lines against opening angles, and definitive dimensional logs of our ductile iron check valves are fully verified inside the catalogue below. Reach out to our technical sales division today to receive specialized hydraulic sizing support or to configure the optimal raw material trim for your specific infrastructure.
