Balance valve is under hydraulic conditions, play a dynamic, static balance adjustment valve. Such as static balance valve, [dynamic balance valve]. Static balance valve, also known as balance valve, manual balancing valve, digital lock balance valve, two-position control valve, which is by changing the valve core and seat gap (opening), to change the flow resistance through the valve to achieve regulation The purpose of traffic, the role of the object is the system resistance, the new amount of water can be balanced according to the proportion of design and distribution, each branch at the same time proportional increase or decrease, still meet the needs of the current part of the load demand climate needs, play The role of heat balance. Dynamic balance valve is divided into dynamic flow balance valve, dynamic pressure balance valve, self-pressure control valve and so on their own. Dynamic flow balance valve, also known as: self-flow control valve, self-balancing valve, constant flow valve, automatic balancing valve, which is based on system conditions (pressure) changes automatically change the drag coefficient, Within the range, you can effectively control the flow through to maintain a constant value, that is, when the pressure difference between the front and back of the valve increases, the valve automatically closes the flow of small movements can not increase, on the contrary, when the pressure drop decreases, the valve Automatically open large, the flow remains unchanged, but when the pressure is less than or greater than the normal working range of the valve, it can not provide an additional pressure head, the valve hit the fully open or fully closed position than the flow rate is still set Low or high flow rate can not be controlled. Dynamic pressure balance valve, also known as self-pressure control valve, differential pressure controller, regulator variable synchronizer, differential pressure balance valve, which is used to adjust the pressure valve opening, the use of spool pressure Reduce the change to make up for the change of the pipeline resistance so as to keep the pressure difference basically unchanged when the working conditions change. Its principle is that within a certain flow range, the pressure drop of the controlled system can be effectively controlled, that is, when When the system pressure increases, the valve will automatically close the small movements, which can ensure that the controlled system pressure increases. On the contrary, when the pressure difference decreases, the valve opens automatically and the pressure difference remains constant. Self-pressure control valve in the control range of the automatic valve plug is closed, the pressure across the valve exceeds the preset value, the valve plug automatically opens and automatically adjusts the opening under the action of pressure-sensitive film to maintain pressure at both ends of the valve The difference is relatively constant.
Double Suction Pump
As an important form of Centrifugal Pump, double suction pump is widely used in engineering because of its high lift and large flow. The impeller of this pump type is actually a combination of two back-to-back impellers, and the water flow from the impellers merges into a volute. The double-suction pump has the following characteristics: it is equivalent to two single-suction impellers of the same diameter working at the same time, and the flow rate can be doubled under the same outer diameter of the impeller; the pump casing is horizontally opened, which is convenient for inspection and maintenance. The inlet and outlet of the suction pump are in the same direction and perpendicular to the pump shaft, which is conducive to the arrangement and installation of the pump and the inlet and outlet pipes; the impeller structure of the double suction pump is symmetrical, there is no axial force, and the operation is relatively stable.
Double Suction Pump,Double Suction Centrifugal Pump,Double Suction Water Pump,Carbamide Pump
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