Types and Characteristics of Household Heating Valves

2025-06-12 08:05:30

Household heating valves play an important role in the heating system by controlling water flow, regulating temperature, and ensuring system safety. There are various types of valves, each with distinct functions and characteristics. Below is an introduction to the common types and features of household heating valves:  

Classification by Function and Characteristics  1. Gate Valve  

Characteristics:   - Low flow resistance, allowing bidirectional medium flow, and labor-saving operation for opening/closing.   - The sealing surface is less prone to erosion and wear from the medium, but when fully open, impurities easily deposit on the sealing surface, affecting sealing performance.   - Long opening/closing stroke and slow operation, commonly used in positions that do not require frequent switching.   Application Scenarios:  Installed on the main pipeline of the heating system as a "main switch" to connect or cut off the pipeline.  

2. Globe Valve

Characteristics:  

- Simple Structure, convenient for manufacturing and maintenance, with good sealing performance.   - High flow resistance, clear requirement for medium flow direction (generally inflow from below the valve disc), and requires greater torque during opening/closing.   - Can roughly adjust flow, but the regulating performance is inferior to that of control valves.   Application Scenarios:  Installed on branch pipes that require flow regulation or one-way cutoff, such as the inlet and outlet of radiators.

 3. Ball Valve  

Characteristics   

- Quick opening/closing, convenient operation, and can be switched by rotating 90°.   

- Excellent sealing performance, extremely low flow resistance, suitable for various media.   

- compact structure, small size, long service life, but sealing materials may age at high temperatures.  

Application Scenarios:  Commonly used in scenarios requiring quick switching, such as the water inlets of water heaters and wall-hung boilers, or branch circuits that need frequent adjustment.  

4. Butterfly Valve  

Characteristics:   

- Simple structure, small size, light weight, and low requirement for installation space.   

- Convenient and quick opening/closing, good regulating performance, and can adjust flow by controlling the angle of the butterfly plate.   

- Medium sealing performance, suitable for low-pressure systems, prone to leakage under high pressure.   Application Scenarios:  Flow regulation for large-diameter heating pipes, such as the main inlet valve for community central heating.  

5. Control Valve (Thermostatic Valve)  

Characteristics:  

- The core function is to automatically adjust flow through temperature sensing to achieve precise control of indoor temperature. 

- Usually equipped with temperature scales or knobs, allowing users to manually set comfortable temperatures.   - Energy-saving effect, reducing heat waste according to needs.   

Application Scenarios:  

Installed at the water inlet of radiators, a key component for achieving "room-by-room temperature control" in independent household heating systems.  

6. Check Valve (One-Way Valve)  

Characteristics:   

- Automatically opens by the pressure of medium flow to prevent backflow, protecting equipment safety (e.g., preventing hot water backflow from damaging wall-hung boilers).   

- Structures include lift type and swing type; the lift type has better sealing performance, while the swing type has lower resistance.   

Application Scenarios:  

Installed at the outlet of equipment such as water pumps and wall-hung boilers, or on vertical pipes to prevent heating water from flowing backward.  

7. Safety Valve  

Characteristics:   

- Automatically opens to release pressure when the system pressure exceeds the set value, and closes automatically after pressure recovery to ensure system safety.   

- Rapid pressure relief action, high requirement for sealing performance, and needs regular calibration (e.g., once a year).   

Application Scenarios:  

Installed at the water outlet of equipment such as wall-hung boilers and boilers, or on the main pipeline of central heating systems to prevent pipe explosion caused by excessive pressure.