Title: +038=320.103-SB005T_08-Energy Valve Reguleringsventil Belimo - Generelle merknader for prosjektering.pdf
The flow coefficient kv [m3/h] is the specific volume flow of a valve with a defined delay angle with reference to 100 kPa (1 bar). The kv value changes depending on the valve position. The flow coefficient is determined for a water temperature of 5…40°C.kvsThe kv value in reference to the nominal delay angle is referred to as the kvs value. The manufacturer specifies the maximum valve opening of the nominal delay angle. Characterised control valves (CCV): Flow coefficient at 100% valve opening (90° angle of rotation) Zone valve (QCV): Flow coefficient with corresponding position of the end stop clip (variable) Globe valves: Flow coefficient at 100% valve opening Butterfly valves: Flow coefficient at 60% valve opening for control application∆pv100Differential pressure across the completely opened valve at V'100∆pVRDifferential pressure at the respective branch (supply/return) with nominal load∆pMVDifferential pressure via the variable-flow part (e.g. an exchanger) at nominal loadps