Hydraulic Separators for boiler circuit
Hydraulic separators are known under another name like low-loss header. Hydraulic Separator is designed for separating boiler and heating circuit for medium and high power systems including one or several boilers and one or several heating ciruits, provide independent operation of both circuits without the need to balance the flow rates. Hydraulic Separators are used in high volume central heating systems (e.g. revamping).
Features
- separating boiler and heating circuit
- maintaining independent mass flow in the boiler circuit and the heating circuit
- eliminating flow rate balancing in the boiler circuit and the heating circuit
- heating medium blowdown
- heating medium air purging
Design
Hydraulic Separators is designed as a low-carbon steel cylindrical tank with external paint coat finish. Tank shell (1) includes four ports. Inlet (2) and outlet (3) ports connect the boiler circuit, whereas outlet (4) and inlet (5) ports connect the heating circuit. A perforated baffle (6) preventing direct water flow from the boiler to the heating system with air purging. To remove the air from the top tank section, the tank is fitted with an air relief valve port (7). The bottom tank section includes baffles (9) for easy blowdown. The separated solids are removed via a drain valve port (10).
- The volume at the heating medium return is equal to the volume at the heating system inlet (Fig. 1). The quantity of heat delivered QD is equal to the quantity of heat received QO.
- With the heating system control valves closed due to a reduced heat demand QO, part of the stream flows along the hydraulic separator (Fig. 2). The excess heat QD is returned and indicates that the boiler power should be reduced or the boilers stopped.
- If the heat demand QO is higher than the boiler power QD, the heating system pumps force the return stream suction (Fig. 3). It reduces the temperature of the heating circuit supply stream. It indicates that the power should be increased or another boiler activated.
Flows by the hydraulic separator type SP
Flows by the hydraulic separator type SPP
Flows by the hydraulic separator type SPD