Valrom-manufactured PPR valves are utilized in indoor hot and cold water supply and heating systems. The product complies with SR EN ISO 16139. Sealing performance conforms to ISO 9393-2:2005. The valves are rated PN25 bar at 20°C, PN6 for hot water and heating, and are designed for use in PPR hot/cold water and heating distribution systems. The valves are marked with: Valrom logo, PP-R material, nominal diameter DN, water flow direction arrow, and production date. These valves are designed for fully open/closed operation and are not intended for flow regulation.