Heating system is commonly used to have valve, gate valve, butterfly valve, ball valve, check valve, safety valve, pressure reducing valve, pressure regulator valve, balance valve, regulating valve, etc..
1. Safety valve :
The safety valve is mainly used for pressure relief of medium overpressure to protect equipment and system. In some cases, the micro hydraulic pressure relief valve can be used as a pressure relief valve.
2. Pressure reducing valve :
The principle of the valve is through the opening and closing of the valve hole to adjust the flow section to reduce pressure. Generally have a spring type, piston and bellows type, can be based on various types of pressure relief valve to adjust the range of choice. Hot water and steam pipes are usually used to adjust the pressure of the medium, to meet the needs of users.
3. Ball valve :
Ball valve working principle is: the valve core for a cavity of the ball, through the control valve spool to do 90. To open or block the valve. It's off in the pipeline.
Advantages: in addition to the gate valve, the advantages of the cut-off valve, there are small, sealed good (zero leakage), the advantages of easy operation. At present in the petrochemical, electric power, nuclear power, aviation, aerospace and other departments are widely used.
Disadvantages: maintenance difficulties.
Ball valve has two types: floating ball and fixed ball type. Due to its excellent sealing, the reliability of the operation, has long been favored by the user. Ball valve without direction, can be installed at any angle. When the welding ball valve level installation, the valve must be open, to avoid the welding of the electric spark injury to the surface of the sphere. When installed in the vertical pipe, if the welding on the interface, the valve must be open, if the welding interface, the valve must be closed, so as to avoid the valve inside the heat burns.
4. Regulating valve :
Regulating valve, also known as the throttle valve, the heating system is the two network of commonly used valves.
Working principle: the shape, the structure and the stop valve are similar. Just a different seal. The valve disc and seat similar to the thermos bottle cork and bottle, by moving the valve to change the flow area to adjust the flow. A scale indicates the corresponding flow on the valve shaft.
Function: to regulate the distribution of medium flow in the pipeline to achieve thermal equilibrium.
5. Balance valve :
Improved regulating valve. Flow channel using DC, the seat changed to ptfe. Overcoming the disadvantages of the large flow resistance, at the same time, it has two advantages: the sealing is more reasonable, and the cut-off function. Heating project in the two use of the Internet, with excellent flow regulation characteristics, especially suitable for variable flow system. Directional, can be installed horizontally, can also be installed vertically.
6. Trap :
The main function is to prevent the steam from passing through, and to eliminate the condensation water. The steam flow in the pipeline, and continuously produce condensation water, especially after heat dissipation equipment to produce a large amount of condensation water. Part of the steam condensation water entrainment, such as condensation directly back into the pool or discharge will reduce the heat efficiency, and the emergence of the phenomenon of water hammer. Traps can be resistance to gas drainage, improve the system's steam utilization rate, is an important equipment to ensure the normal operation of the system.
7. Temperature control valve :
In recent years, with the popularization and application of energy-saving heating technology, the temperature control valve as a temperature control for the flow control valve is widely used in new residential construction in our country, the temperature control valve installed in the heating radiator of residential and public buildings, it can set the temperature according to the different requirements of users. Temperature control valve temperature sensor can sense the temperature of the surrounding environment changes, resulting in volume change, thereby leading to the displacement of the valve spool, and then adjust the water temperature of the radiator to change the amount of heat sink. It's temperature and temperature of the room temperature and in accordance with the current heat demand at any time to automatically adjust the supply of heat to prevent overheating of the room temperature, to achieve the highest level of comfort.
