Constant pressure balance valve is a kind of the valve with the special function. It has good flow characteristics, valve opening index, opening locking device and pressure measuring valve for flow measurement. By using special intelligent instrument, we input the valve type and opening value, according to the measured pressure difference signal, and the flow value through the balance valve can be directly displayed. As long as the appropriate specifications of the balance valve are installed in each branch and user's entrance and debugged once with the special intelligent instrument, the flow of each user can reach the set value.
Constant pressure balance valve is a dynamic and static balance valve under hydraulic conditions. For example: static balance valve, dynamic balance valve. Static balance valves are also called balance valves and double-position control valves. They change the flow resistance through the valve by changing the clearance (opening) between the spool and the seat to achieve the purpose of regulating the flow. The object of their action is the resistance of the system, which can balance the new water according to the proportion calculated by the design. Each branch increases or decreases in proportion at the same time, and still meets the current climate needs. Part of the load flow demand plays a role of heat balance.
Constant pressure balance valve is equivalent to a throttle element whose local resistance can be changed. For incompressible fluid, the flow equation can be obtained. Compared with other valves, balancing valves have the following characteristics:.
(1) Linear flow characteristics, that is, under the condition of constant pressure difference between front and back of the valve, the flow rate and opening are generally linear; (2) accurate opening indication;
(3) With opening locking device, non-managers can not change the opening freely; the meter connection can conveniently display the pressure difference before and after the valve and the flow through the valve.