Expansion tanks of radiant heating and cooling water, its volume changes.
Installing the Extrol 30 Expansion Tank
Installing the Fill-Trol 109 Expansion Tank
Installing the RX 15 Radiant Extrol Expansion Tank
Fixing an Expansion Tank with Excess Water
Where can an expansion tank be installed?
To compensate for this phenomenon, in the hydraulic system need to install an expansion tank, which will collect excess water from the system by increasing its volume, and give a decrease in volume. The most common diaphragm expansion tank. His pre-filled with gas (nitrogen or air) under pressure, which is 100-300 g / cm less than the design pressure in the system. Membrane after filling the caves in to some intermediate position. When the temperature rises, the volume of fluid increases and the membrane bending stronger. This increases the pressure of the gas under the diaphragm and the liquid pressure over the membrane. To protect the tank from damage, it set the safety valve, designed for overpressure of 5-6 kg / cm. Expansion tank installed on the suction side of the pump, to provide for his work stable pressure. The advantages of using membrane expansion tanks: corrosion and contamination of the system reduces heat carrying fluid does not evaporate, these tanks are not necessarily set at the top point of the system, and therefore reduces installation costs. ^ The storage (storage) tanks compressor refrigeration unit can not be switched on and off too often. Introduction into the storage tank allows you to maintain a constant temperature in the room: in suspension compressor when changing heat loads. There are two basic ways to install the storage tank: At the exit of the chiller. The temperature of water in the tank close to the temperature exiting the chiller water. From the tank water is distributed over lines and customers. Back in the chiller water is bypassing the expansion tank. Disadvantage: need to maintain a constant water flow, you can not turn off the water supply to consumers. With the abstraction of water in the chiller. Water is fed into the tank of the chiller, and then climbs again to the input of the chiller. Hydraulic pipes are connected to the expansion tank. The temperature of water in the tank close to the temperature of incoming water in the chiller. Advantages: Users can at any time off or change the water flow, without hindering the work of the system.
Jul 8th, 2010
