• Castle Valves

Dynamic Pressure Independent Balancing Valves

Castle Valves offers Dynamic Pressure Independent Balancing Valves (DPIBV) for the HVAC industries. The DPIBV is a new generation product different from the manual balancing valve. It is a combined product of dynamic balancing and 2-way control function. When the system pressure changes in the variable flow system with larger system load fluctuations, the pressure differential (P1-P3) between two ends of the (DPIBV) will also change. The electric valve core is calibrated variable orifice adjusted by electrical actuators according to the signal from thermal sensors; this results in increase or decrease in pressure at P1. The diaphragm, which is counteracted by helical spring, regulates the pressure differential between P1 and P3, thus maintaining the differential pressure across P1 and P3. This ensures that the differential pressure and flow are maintained according to pre-set range of the valve. Working principle: the actuator can be pre-set to limit the working range of the valve which limits the maximum flow rate through the valve. Consequently, hydronic balance is achieved automatically without the use of additional balancing valves. Castle DPIBV ensures more accurate controls due to long strokes of the actuators. Salient features: pressure independent control of flow; total valve authority; BMS compatible; no calculations required; and equipped with Belimo actuators (Sweden).