Float Valves

Float valves are used for mechanical level control in open or closed tanks, storage vessels, water reservoirs, filling systems, and industrial water lines or other compatible liquids. Level is sensed by a float which, through a lever mechanism, directly modulates the valve opening. As liquid level rises, inlet flow is reduced or shut off; as level falls, the valve reopens automatically without electrical or pneumatic actuation.

This category includes Berluto float valves in the ESV, KSV, RSV and SV series, Mankenberg ATHENA / NV models, Genebre 2856 / 2856N, and Genebre floats for corresponding level-control arrangements. Selection should be based on inlet pressure, required filling rate, Kvs, shut-off level, tank configuration, available float travel, liquid density, temperature, elastomer compatibility, and body material.

Berluto ESV valves cover medium- and high-flow duties, with sizes DN40 to DN80, inlet pressure up to 12 bar, Kvs values from 13.6 to 47 m³/h, and operating temperature up to 190 °C, including service with aggressive water or other compatible aggressive liquids. Berluto KSV10 valves cover DN15 to DN25, inlet pressure up to 12 bar, Kvs from 2.7 to 6.7 m³/h, and temperatures up to 80 °C, or up to 190 °C when fitted with a stainless steel float.

Available versions include DIN execution, PN16 and PN40 pressure classes, with BSP, NPT, or flanged connections. Body materials include cast iron, cast steel, and stainless steel. Mankenberg ATHENA NV15e / NV95e valves are manufactured in ductile iron GJS 450-10 with epoxy coating, PN16, for potable water service up to 70 °C. NV98 versions are stainless steel, PN16, for liquids up to 130 °C, with elastomer options compliant with FDA and USP Class VI requirements. Genebre 2856 / 2856N valves are manufactured in AISI 316 with silicone sealing, maximum operating pressure 10 bar, and ISO 228/1 or NPT end connections depending on version.