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Valve distribution and selection recommendations for urban drainage systems
Drainage valves are indispensable water industry products in urban drainage systems. Among them, the most widely used are various types of medium and low pressure valves, including various butterfly valves and gate valves. Others include ball valves, check valves, exhaust valves, plug valves, and diaphragms. Valves, pressure reducing valves, flow regulating valves, mud discharge valves, etc.
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2023.11
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Analysis of causes of gate valve leakage
Gate valve is the most common industrial valve and is widely used in industrial fields such as petroleum, petrochemicals, power stations, long-distance pipelines and shipbuilding. As a kind of fluid control equipment, the opening and closing part of the gate valve is a gate plate. Through the up and down movement of the gate plate, the open and closed states are switched, thereby realizing the function of cutting off or connecting the medium in the pipeline. If the gate valve leaks, it can easily cause hidden dangers to pipelines, equipment and facilities, and even affect the safety of personnel and equipment.
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2023.11
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What are the key points and taboos of gate valve installation?
During the installation process of gate valves, butterfly valves and other valves, the quality of the installation will directly affect the normal operation in the future, so you must pay attention to it. Installation taboo 1: Taboo: The main materials, equipment and products used in construction lack technical quality appraisal documents or product certificates that comply with current national or ministerial standards. Consequences: The quality of the project is unqualified, there are hidden dangers of accidents, it cannot be delivered on time, and must be reworked and repaired; resulting in delays in the construction period and increased investment in labor and materials. Measures: The main materials, equipment and products used in water supply, drainage and heating and sanitation projects should have technical quality appraisal documents or product certificates that comply with current standards issued by the state or the ministry; their product names, models, specifications, and national quality standards should be marked. Code number, date of manufacture, manufacturer’s name and location, factory product inspection certificate or code number. Installation taboo 2: Taboo: Failure to carry out necessary quality inspections according to regulations before valve installation. Consequences: During system operation, the valve switches are inflexible, closed tightly and water (steam) leaks...
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2023.11
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What are the installation and contraindications for valves such as gate valves and butterfly valves?
During the installation process of gate valves, butterfly valves and other valves, the quality of the installation will directly affect the normal operation in the future, so you must pay attention to it. So, how to install gate valves and butterfly valves? Five key points for installing the five major valves: 1. Direction and location Many valves are directional: For example, stop valves, throttle valves, pressure reducing valves, check valves, etc., if installed upside down, will affect the use effect and life (such as throttle valves), or will not work at all (such as pressure reducing valves), or even Causing hazards (e.g. check valves). Generally, valves have direction marks on the valve body. If not, it should be correctly identified based on the working principle of the valve. The valve cavity of the stop valve is asymmetrical from left to right, and the fluid must pass through the valve port from bottom to top. In this way, the fluid resistance is small (determined by the shape), and it is labor-saving to open (because the medium pressure is upward). After closing, the medium does not press the packing, which is convenient for maintenance. , this is why the stop valve cannot...
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2023.11
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What is the difference between soft seal gate valve and hard seal gate valve?
Soft seal is the seal between metal and non-metal, and hard seal is the seal between metal and metal. Both soft seal gate valves and hard seal gate valves are made of sealing materials. The hard seal is precision machined from the valve seat material to ensure the accuracy of matching with the valve core (ball), usually stainless steel and copper. Soft seal means that the sealing material embedded on the valve seat is non-metallic material. Since the soft sealing material has a certain elasticity, the processing accuracy requirements will be lower than that of a hard seal.
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2023.11
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How to choose butterfly valves and gate valves under different circumstances?
Butterfly valves are suitable for pipelines transporting various corrosive and non-corrosive fluid media in engineering systems such as generators, coal gas, natural gas, liquefied petroleum gas, city gas, hot and cold air, chemical smelting and power generation environmental protection, building water supply and drainage, etc. Used to regulate and cut off the flow of media.
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2023.11
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14 taboos in gate valve installation! But be careful!
Installing a gate valve is not an easy task. Do you know there are fourteen major taboos? What will be the consequences if these taboos are violated? How to solve it?
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2023.11
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How should knife gate valves be maintained?
Knife gate valves are used to shut off a variety of solid-containing media applications, including oil sand slurries, pulp feedstocks, mines, wastewater treatment, power stations, and more. Routine maintenance and repairs are also very important to ensure normal use.
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2023.10
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Top 10 international valve brands
WESDOM Group specializes in pipeline fluid systems: R&D, production and sales of valves, pipe fittings, water meters, flow meters, etc. The products cover cast iron, cast steel, stainless steel, copper, plastics and other materials, which are widely used in hydropower stations, heat, buildings, Water supply and drainage, petroleum, chemical industry, electric power, medical and other fields.
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2023.10
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You still don’t know much about pneumatic butterfly valves!
Pneumatic flange butterfly valve, pneumatic flange butterfly valve, this product is composed of rubber seal butterfly valve, carbon steel or stainless steel valve plate and valve stem. It is suitable for regulating flow and intercepting media in water supply, drainage and gas pipelines with temperatures ≤80~120℃ such as food, chemical industry, petroleum, electric power, textile, papermaking, etc.
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2023.10
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How to determine internal leakage of valve?
4-6 hours after the valve is closed, use an infrared thermometer to measure the temperature of the valve stem (near the valve body) or the metal temperature 150mm downstream of the valve body. If it is greater than 70°C, it is considered "internal leakage". This judgment method is applicable to most internal leakage valves.
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2023.10
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How to select materials for valves in chloride ion corrosion environment?
Stainless steel produces stress corrosion in a corrosive medium environment containing oxygen and chloride ions. The proportion of stress corrosion failure is as high as about 45%.
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2023.10
