Valrom-manufactured PPR valves are utilized in indoor hot water, cold water, and heating installations. The product complies with SR EN ISO 16139. Sealing 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 indicator arrow, and production date. The valves are designed for fully open/closed operation. They are not intended for flow regulation.