Scope of application: Closed water circuits (pH >7) Liquid temperature: −10...120°C (compact drives TR../TRY.. only up to 100°C) Pipe connection: Internal thread Rp (ISO 7-1) Tightness: Regulation branch A – AB: airtight, tightness A (EN 12266-1) / bypass B – AB: tightness class I Flow characteristics: Regulation branch A – AB: equal percentage / bypass B – AB: linear (flow 70% of kvs value)