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Application of valve in district heating system

The diversification of urban heating modes and the reform of the heating system, the energy structure is also constantly adjusted, and the heating methods in residential quarters are also becoming diversified.

District heating system-central heating of coal-fired boiler room

This is a relatively traditional district heating method. It is applied to a heating system in a larger area. It has the advantages of small investment, can be realized in a short time, low technical requirements, and short heat transmission lines, but the thermal efficiency of the boiler is low, only 50%. In spite of these shortcomings, this heating system technology is mature and is still widely used in some communities.

District heating system-central heating of gas boiler room

Due to the increased awareness of environmental protection, the centralized heating of gas-fired boiler rooms has also been rapidly applied and promoted. The thermal efficiency of gas-fired boilers is about 90%, and no dust is generated during the combustion process. The sulfur dioxide generated is also higher than that of coal-fired boiler rooms. The heat is much less.

District heating system-electric boiler heating

The thermal efficiency of the electric boiler is above 95%, the area is small, the operation is noiseless, does not pollute the environment, and the adjustment is relatively simple. The operation is also relatively safe and reliable, and the early installation is convenient, but the operating cost is relatively large, and there is a waste of resources.

District heating system-ground source heat pump heating

The ground source heat pump heating system is a new type of heating system. It relies on the shallow soil or groundwater. The heating coefficient can be as high as 3.5 or more than 4.7. It can realize heating in winter, cooling in summer and providing domestic heat throughout the year. For water services, this heating method has low operating costs and has better energy saving and environmental protection effects, but the initial investment is relatively large.

Introduction of heating system valves

Gate valve: It shuts off in the pipeline, has low fluid resistance, has no directionality, and is strong and durable.

Globe valve: Generaly, the caliber is below 100 mm. It shuts off in the pipeline and can also roughly adjust the flow.

Ball valve: In addition to the advantages of gate valve and stop valve, it also has the advantages of small size, good sealing and easy operation.

Butterfly valve: It has a shut-off function in the pipeline and can also adjust the flow. It has a simple structure, light volume, convenient operation and good sealing.

Check valve:A commonly used auxiliary valve. Its function is to prevent the medium from flowing back. It is usually installed at the pump outlet to prevent water hammer from damaging the pump.

Regulating valve: Regulate the medium flow distribution between pipelines to achieve thermal balance.

Balance valve: Has excellent flow regulation characteristics, especially suitable for variable flow systems.

Self-operated balancing valve: automatically eliminate hydraulic imbal-ance, improve system efficiency, and realize economic operation.

General Configuration List
1 Lever wafer butterfly valve DN50/PN16 Body:DI,Disc:DI
Seat:Wide seat EPDM
2 Gear wafer butterfly valve DN200/PN16 Body:DI,Disc:DI
Seat:Wide seat EPDM
3 Forged flang rubber joint DN200/PN16 Flange:forged Q235,Ball:EPDM set
4 Wafer check valve DN200/PN16 Body:DI,Seat:EPDM,Disc:DI set
5 Y type strainer DN200/PN16 Body:DI,Mesh:304 set
6 SS304 globe valve DN50/PN16 Body:SS304,Seat:304,Disc:304 set
7 Brass ball valve DN200/PN16 Body:HPb59-1,Seat:PTFE

Introduction of heating system valves distribution sequence diagram


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