Principle of operation: The ball valve is adjusted by a rotary actuator. The actuator is controlled by a commercially available modulating or 3-point control system and moves the ball of the valve – the throttling device – to the position dictated by the positioning signal. Open the characterised control valve counterclockwise and close it clockwise.
Flow characteristic: Equal percentage flow control is ensured by the special design of the ball.
Constant flow volume: With a differential pressure of 16…350 kPa, a constant flow volume is achieved thanks to the integrated pressure regulationg valve. Independent of the differential pressure through the valve, a valve authority of 1 is achieved. Even with pressure variatons and in the partial load range, the flow rate remains constant with each respective opening position (angle of rotation) and ensures a steady control.
Flow limitation: Instead of the electric actuator, the PIQCV-valve can also be operated with a flow limiter (see accessories). The flow limiter ensures that the heat exchanger is continuously supplied with a manually fixed amount of water.
Technical Data C215QP-D
Functional Data:
Media Cold and warm water, water with glycol up to max. 50% vol.
Medium temperature 2...90°C
Pressure value 16...350 kPa
Permissible pressure ps 1600 kPa
Closing pressure ∆ps 700 kPa
Flow characteristic equal percentage (VDI/VDE 2178), optimised in the opening range
Pressure stability With a pressure value of 16...350 kPa: ±10%
Leakage rate Leakage rate A, tight (EN 12266-1)
Flow setting see Installation instructions
Pipe connectors Internal thread according to ISO 7-1
Angle of rotation 90° (Operating range 15...90°)
Installation position Upright to horizontal (in relation to the stem)
Maintenance Maintenance-free
Materials:
Housing Brass body
Closing element Stainless steel
Stem Stainless steel
Stem seal O-ring EPDM
Valve seat PTFE, O-ring EPDM
Diaphragm EPDM
Terms:
Abbreviations Vnom = nominal flow with valve completely opened, Vmax = maximum flow set by the angle of rotation limitation on the actuator
