Pressure Independent Control Valve

he Pressure Independent Control Valve (PICV) incorporates a small diaphragm type DPCV in order to keep a constant differential pressure across an orifice in order to provide a constant flow rate whilst the differential pressure is with the operating limits of the valve. Beyond these working pressures the valve acts in a similar way to a fixed orifice valve.

Salient Features included:-

• Suitable for Plenty of applications, due to wide range of actuators available.
• High precision large diameter lockable hand-wheel with simple linear setting scale.
• The flow rate is adjustable via the hand-wheel even when an actuator is fitted.
• Full stroke equal percentage temperature control valve gives maximum control under all flow conditions.
• Reduces capital outlay by eliminating the need for terminal balancing valves, temperature control valves, branch and mains balancing valves, and system differential pressure control valves.
• The valve has been designed to be easily close coupled to the terminal unit.
• Selection is simple as no authority calculations are needed.
• Reduces circuit interactivity.
• Commissioning is simplified as no costly proportional balance is required.
• Controllability is made easy due to the equal percentage characteristic.
• User comfort maximized by ensuring every temperature control valve has full authority.

Typical applications of the PICV’s may include:-

• Fan Coils
• Chilled Beams (Active and Passive)
• Radiant Panels and Radiators
• Heater Batteries
• Small Air Handling units
• Heat Recovery Units