It is installed on the bypass pipe in the inlet valve section and is used to fill the valve for balancing the water pressure before and after the inlet valve.
For example, pressure relief valves, control valves, and steam traps are usually equipped with bypass pipes. The valve installed on the bypass pipe is called the bypass valve. The term bypass valve refers to a valve that is installed in a bypass pipe, but does not specifically refer to the type and structure of the valve. Bypass valve, also known as self-operated bypass pressure difference valve, self-operated pressure difference control valve.
Self-operated differential pressure control valve is an alternative to electric differential pressure control valve. Its advantage is that it does not require external power, and it depends on the pressure of the system itself. It effectively improves the safety factor of operation and is safer and more reliable than traditional electric differential pressure control valves. It also solves the problems of the electric pressure differential control valve's trust in electricity and circuit problems. The probability of damage, and the self-operated self-pressure control valve is easy to install and saves money.
The use of self-pressure differential pressure control valve:
Self-operated self differential pressure control valve is applied to protection of cold (hot) source units. It is installed on the bypass pipe between the collector and the water separator. When the user-side part runs or variable-capacity operation, the system flow becomes smaller and the pressure difference increases. When the pressure difference exceeds the set value, the valve opens automatically. The flow then passes to ensure that the unit flow rate is not less than the limit.
Self-operated self-pressure differential control valves are used in centralized heating systems to ensure that the cooling equipment is not over-pressurized or does not empty. For example, if a certain system has a large difference in height and height, and it is not divided into high and low area systems, then if the pressure is set at a high level, the heat sink may be explosive at a low level; if it is at a low pressure, it will be empty at a high point.
In this case, if the heat source is low, the booster pump can be put into the high zone branch water pipe. The pressure difference valve of the return pipe can increase the pressure in the high zone and then the valve can be lowered to the low zone backwater pressure; if the heat source is high The low zone water supply pipe can be installed with a differential pressure valve and a return water plus booster pump so that the circulating water reduced in pressure through the valve can be returned to the system.