Water pressure relief valve UF4 series

DINfor hygienic applicationsfor the chemical industry

The APV UF4 and UFR4 Pressure Relief Valves are engineered to safeguard pumps and downstream process equipment by reliably opening in the event of a pressure spike. Designed for hygienic and aseptic applications (Aseptic Pressure Relief Single Seat Valves - UFMS4), these valves ensure consistent system protection and operational safety. Beyond pressure relief, the UF4/UFR4 series offers enhanced control capabilities, allowing users to integrate the valve seamlessly into automated process systems. During CIP operations, the valve can also be actuated to ensure thorough seat cleaning and maintain top‑level hygiene. Smart, robust, and automation‑ready, the UF4 Series delivers dependable performance for modern processing environments. Optimum Cleanability No dead spaces in the valve body Full opening cross section available during cleaning (no seat lift stroke limitation) 3-A approved designs and compliance with EHEDG guidelines All product-contact components made of AISI 316L / DIN EN 1.4404 stainless steel Downtime Reduction and Serviceability Enhanced control via proximity switches or control unit feedback for pressure relief events Seal lifting function supports cleaning and minimizes downtime Process Optimization External over-pressure relief valve protects pumps and redirects excess pressure Modulating cone provides smooth valve closure to prevent pressure hammers Standardized valve sizes: DN 25 to DN 100 / ISO 1″ to 4″ Design and Upgrade Capability Ball-shaped body with smooth passages—no sump or dome—for improved CIP cleaning