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Manual Operation of Valve
Manual operation valve is a valve that controls the flow of fluids (such as liquids and gases) through manual methods, and is widely used in industries, agriculture, construction and home fields. The following is an introduction from the aspects of definition, classification, application, advantages and purchasing suggestions:
1. Definition and Basic Principles
Definition: Manually operated valves are to directly control the opening, closing or adjust the opening of the valve core through manual devices such as handles, handwheels or levers, thereby achieving adjustments to the fluid flow, pressure and direction.
Basic Principles:
Opening and closing control: Change the valve spool position by rotating or pushing the handle to achieve full opening or closing of the valve.
Flow adjustment: By adjusting the valve core opening, the cross-sectional area of fluid passing through the valve is controlled, thereby adjusting the flow magnitude.
2. Main types and structures
1. Classify by function
Stop valve: used to completely cut off or connect fluid, with good sealing performance.
Throttle valve: used to regulate flow, the valve core is usually needle-shaped or conical.
Ball valve: Turning the ball into a fast opening and closing, and the sealing is reliable.
Butterfly valve: The flow is controlled through a rotating disc (butterfly plate). It has a simple structure and light weight.
Gate valve: Opening and closing through lifting gate plate, suitable for large-diameter pipelines.
2. Classify by drive method
Handle type: The valve is controlled by rotating the handle, suitable for small-diameter valves.
Handwheel type: The valve stem is driven by rotating the handwheel, suitable for large diameter or high pressure valves.
Lever type: Amplifies the operating force through the lever principle, suitable for occasions where large torque is required.
III. Application scenarios
1. Industrial field
Pipeline system: used to control the flow of media such as water, steam, oil and other media.
Chemical equipment: used to adjust the flow rate of the medium in reactors, storage tanks and other equipment.
Energy industry: In gas pipelines and thermal systems, it is used to cut off or regulate the medium.
2. Agricultural field
Irrigation system: used to control water flow and realize partitioned irrigation.
Greenhouse: used to adjust the opening and closing of vents and sunshades.
3. Construction field
Heating system: used to adjust the flow of hot water and control the indoor temperature.
Water supply and drainage system: used to control water flow, such as faucets, shut-off valves, etc.
4. Family Field
Gas pipeline: used to cut off or regulate gas flow.
Faucet: used to control the water flow.
4. Advantages and characteristics
Simple operation: no external power source is required, manual operation is convenient and fast.
Low cost: Simple structure, low manufacturing and maintenance costs.
High reliability: Manual operation is not affected by power supply or air source, suitable for harsh environments.
Wide application range: from small diameter to ultra-large diameter, from low pressure to high pressure, can be used.
Manual operation valve is a valve that controls the flow of fluids (such as liquids and gases) through manual methods, and is widely used in industries, agriculture, construction and home fields. The following is an introduction from the aspects of definition, classification, application, advantages and purchasing suggestions:
1. Definition and Basic Principles
Definition: Manually operated valves are to directly control the opening, closing or adjust the opening of the valve core through manual devices such as handles, handwheels or levers, thereby achieving adjustments to the fluid flow, pressure and direction.
Basic Principles:
Opening and closing control: Change the valve spool position by rotating or pushing the handle to achieve full opening or closing of the valve.
Flow adjustment: By adjusting the valve core opening, the cross-sectional area of fluid passing through the valve is controlled, thereby adjusting the flow magnitude.
2. Main types and structures
1. Classify by function
Stop valve: used to completely cut off or connect fluid, with good sealing performance.
Throttle valve: used to regulate flow, the valve core is usually needle-shaped or conical.
Ball valve: Turning the ball into a fast opening and closing, and the sealing is reliable.
Butterfly valve: The flow is controlled through a rotating disc (butterfly plate). It has a simple structure and light weight.
Gate valve: Opening and closing through lifting gate plate, suitable for large-diameter pipelines.
2. Classify by drive method
Handle type: The valve is controlled by rotating the handle, suitable for small-diameter valves.
Handwheel type: The valve stem is driven by rotating the handwheel, suitable for large diameter or high pressure valves.
Lever type: Amplifies the operating force through the lever principle, suitable for occasions where large torque is required.
III. Application scenarios
1. Industrial field
Pipeline system: used to control the flow of media such as water, steam, oil and other media.
Chemical equipment: used to adjust the flow rate of the medium in reactors, storage tanks and other equipment.
Energy industry: In gas pipelines and thermal systems, it is used to cut off or regulate the medium.
2. Agricultural field
Irrigation system: used to control water flow and realize partitioned irrigation.
Greenhouse: used to adjust the opening and closing of vents and sunshades.
3. Construction field
Heating system: used to adjust the flow of hot water and control the indoor temperature.
Water supply and drainage system: used to control water flow, such as faucets, shut-off valves, etc.
4. Family Field
Gas pipeline: used to cut off or regulate gas flow.
Faucet: used to control the water flow.
4. Advantages and characteristics
Simple operation: no external power source is required, manual operation is convenient and fast.
Low cost: Simple structure, low manufacturing and maintenance costs.
High reliability: Manual operation is not affected by power supply or air source, suitable for harsh environments.
Wide application range: from small diameter to ultra-large diameter, from low pressure to high pressure, can be used.
